The reality of cooling timing in keeping your engine cooled better under heavier load condisions.

[Bob Dunahugh]

One big advantage. Is that these Benz units are PROACTIVE as far as when to=
engage. As they react to your engine block temps as the water comes out =
of the cylinder heads. And is heading TO the radiator. With the REACTIVE =
OEM unit. (1) First you have to get the engine block hotter then normal. (=
2) Then this hotter then normal water needs to get the radiator. (3) Next =
this hotter then normal water needs to heat up our very large radiator. (4=
) Then the hotter then normal radiator needs to heat up all the air going t=
rue it to hotter then normal temps. (5) Next all this hotter then normal a=
ir needs to heat up the fan clutch. So that the fan clutch finally finds o=
ut that there's an over heating problem that started sometime ago. That's h=
ow our antiquated OEM fan clutch works. So is the Benz unit a good idea.=
And not just another gig it? YOU BET. Then on top of that. You can turn i=
t on as YOU want. Then there's a light to tell you when it's on. I love my =
403. And want to keep it as healthy as possible. Thus helping to keep us f=
rom ending up at the side of the road. Bob Dunahugh 78 Royale __=
______________________________ From: Bob Dunahugh =
Sent: Saturday, February 24, 2018 4:27 PM To: gmclist=
Subject: Anyone install the Mercedes Benz electrically controlled fan cl=
utch on a 403 yet? I know Matt Collie has. And he has this answer.=
The Benz unit locates the back of it's fan at the front of were the stock=
fan is located. It's looking to me that this puts the Benz fan well into t=
he stock fan shroud's cone area. Thus I'm thinking that I don't have to cu=
t my now two piece plastic fan shroud. The Benz fan has about a 1" large=
r dia. Bob Dunahugh 78 Royale

 

[Jim Hupy]

Bob, the advantages you speak about are very specific and real life. I ONLY
question the reliability of the Benz setup. Unproven by time is my major
concern. I have had enough of the Hayden fan clutches fail on the road, to
be more than a little bit interested in an alternative to them. But, I have
been snakebit by alternative fan systems as well. One involved changing the
water pump, fan clutch, thermostat and fan by the side of the road on a
customer's coach. Draining hot anti freeze, wrestling wet slippery radiator
hoses, scraping gaskets, etc is not my idea of a fun time, all on my
nickel, although this particular customer compensated me for time and
travel. Please keep us posted on the Benz system, it sounds like it might
be some of the solution for the Hayden failures.
Jim Hupy
Salem, Or
78 GMC ROYALE 403

> One big advantage. Is that these Benz units are PROACTIVE as far as when
> to engage. As they react to your engine block temps as the water comes
> out of the cylinder heads. And is heading TO the radiator. With the
> REACTIVE OEM unit. (1) First you have to get the engine block hotter then
> normal. (2) Then this hotter then normal water needs to get the radiator.
> (3) Next this hotter then normal water needs to heat up our very large
> radiator. (4) Then the hotter then normal radiator needs to heat up all
> the air going true it to hotter then normal temps. (5) Next all this
> hotter then normal air needs to heat up the fan clutch. So that the fan
> clutch finally finds out that there's an over heating problem that started
> sometime ago. That's how our antiquated OEM fan clutch works. So is the
> Benz unit a good idea. And not just another gig it? YOU BET. Then on top
> of that. You can turn it on as YOU want. Then there's a light to tell you
> when it's on. I love my 403. And want to keep it as healthy as possible.
> Thus helping to keep us from ending up at the side of the road. Bob
> Dunahugh 78 Royale
>
>
> ________________________________
> From: Bob Dunahugh
> Sent: Saturday, February 24, 2018 4:27 PM
> To: gmclist
> Subject: Anyone install the Mercedes Benz electrically controlled fan
> clutch on a 403 yet?
>
>
> I know Matt Collie has. And he has this answer. The Benz unit locates
> the back of it's fan at the front of were the stock fan is located. It's
> looking to me that this puts the Benz fan well into the stock fan shroud's
> cone area. Thus I'm thinking that I don't have to cut my now two piece
> plastic fan shroud. The Benz fan has about a 1" larger dia. Bob Dunahugh
> 78 Royale
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

 

[jim kanomata1]

This unit is used by most trucks ad the reliabiliy is mainly on the engine
coolent temp.
I have couple people that are Electrial Engineers and also a very seasoned
electrical technician working to even improve the overall reliability and
performance.
The fan is mounted on the water pump shaft, about 1 1/2 " ahead of the
original as an adapter need to be used to work with this advanced fan
design that pulles in more air than stock and quiter.
Tom Pryor has been working on this for coupler years and finally have
released the package to us to market.
Only modification needed is at the fan shroud as the adapter mount and the
adapters and electrical cotrol ad temp sensor are all part of the kit.
One must see the new fan design to appreciate its pulling capacity and the
sound control.

> Bob, the advantages you speak about are very specific and real life. I ONLY
> question the reliability of the Benz setup. Unproven by time is my major
> concern. I have had enough of the Hayden fan clutches fail on the road, to
> be more than a little bit interested in an alternative to them. But, I have
> been snakebit by alternative fan systems as well. One involved changing the
> water pump, fan clutch, thermostat and fan by the side of the road on a
> customer's coach. Draining hot anti freeze, wrestling wet slippery radiator
> hoses, scraping gaskets, etc is not my idea of a fun time, all on my
> nickel, although this particular customer compensated me for time and
> travel. Please keep us posted on the Benz system, it sounds like it might
> be some of the solution for the Hayden failures.
> Jim Hupy
> Salem, Or
> 78 GMC ROYALE 403
>

>
> > One big advantage. Is that these Benz units are PROACTIVE as far as when
> > to engage. As they react to your engine block temps as the water comes
> > out of the cylinder heads. And is heading TO the radiator. With the
> > REACTIVE OEM unit. (1) First you have to get the engine block hotter
> then
> > normal. (2) Then this hotter then normal water needs to get the radiator.
> > (3) Next this hotter then normal water needs to heat up our very large
> > radiator. (4) Then the hotter then normal radiator needs to heat up all
> > the air going true it to hotter then normal temps. (5) Next all this
> > hotter then normal air needs to heat up the fan clutch. So that the fan
> > clutch finally finds out that there's an over heating problem that
> started
> > sometime ago. That's how our antiquated OEM fan clutch works. So is
> the
> > Benz unit a good idea. And not just another gig it? YOU BET. Then on top
> > of that. You can turn it on as YOU want. Then there's a light to tell you
> > when it's on. I love my 403. And want to keep it as healthy as possible.
> > Thus helping to keep us from ending up at the side of the road. Bob
> > Dunahugh 78 Royale
> >
> >
> > ________________________________
> > From: Bob Dunahugh
> > Sent: Saturday, February 24, 2018 4:27 PM
> > To: gmclist
> > Subject: Anyone install the Mercedes Benz electrically controlled fan
> > clutch on a 403 yet?
> >
> >
> > I know Matt Collie has. And he has this answer. The Benz unit locates
> > the back of it's fan at the front of were the stock fan is located. It's
> > looking to me that this puts the Benz fan well into the stock fan
> shroud's
> > cone area. Thus I'm thinking that I don't have to cut my now two piece
> > plastic fan shroud. The Benz fan has about a 1" larger dia. Bob
> Dunahugh
> > 78 Royale
> >
> > _______________________________________________
> > GMCnet mailing list
> > Unsubscribe or Change List Options:
> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
> >
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502

 

[jim kanomata1]

This Electric fan clutch is what the newer vans and trucks are employing,
so you might say were updating the old technology as the Old fan clutches
are not very reliable.
John Bush our Electrical Engineer working on improving the unit has
researched this unit to where we know Borg Warner did it initially.

On Sun, Feb 25, 2018 at 10:58 AM, Jim Kanomata
wrote:

> This unit is used by most trucks ad the reliabiliy is mainly on the engine
> coolent temp.
> I have couple people that are Electrial Engineers and also a very seasoned
> electrical technician working to even improve the overall reliability and
> performance.
> The fan is mounted on the water pump shaft, about 1 1/2 " ahead of the
> original as an adapter need to be used to work with this advanced fan
> design that pulles in more air than stock and quiter.
> Tom Pryor has been working on this for coupler years and finally have
> released the package to us to market.
> Only modification needed is at the fan shroud as the adapter mount and the
> adapters and electrical cotrol ad temp sensor are all part of the kit.
> One must see the new fan design to appreciate its pulling capacity and the
> sound control.
>

>
>> Bob, the advantages you speak about are very specific and real life. I
>> ONLY
>> question the reliability of the Benz setup. Unproven by time is my major
>> concern. I have had enough of the Hayden fan clutches fail on the road, to
>> be more than a little bit interested in an alternative to them. But, I
>> have
>> been snakebit by alternative fan systems as well. One involved changing
>> the
>> water pump, fan clutch, thermostat and fan by the side of the road on a
>> customer's coach. Draining hot anti freeze, wrestling wet slippery
>> radiator
>> hoses, scraping gaskets, etc is not my idea of a fun time, all on my
>> nickel, although this particular customer compensated me for time and
>> travel. Please keep us posted on the Benz system, it sounds like it might
>> be some of the solution for the Hayden failures.
>> Jim Hupy
>> Salem, Or
>> 78 GMC ROYALE 403
>>

>>
>> > One big advantage. Is that these Benz units are PROACTIVE as far as when
>> > to engage. As they react to your engine block temps as the water comes
>> > out of the cylinder heads. And is heading TO the radiator. With the
>> > REACTIVE OEM unit. (1) First you have to get the engine block hotter
>> then
>> > normal. (2) Then this hotter then normal water needs to get the
>> radiator.
>> > (3) Next this hotter then normal water needs to heat up our very large
>> > radiator. (4) Then the hotter then normal radiator needs to heat up all
>> > the air going true it to hotter then normal temps. (5) Next all this
>> > hotter then normal air needs to heat up the fan clutch. So that the fan
>> > clutch finally finds out that there's an over heating problem that
>> started
>> > sometime ago. That's how our antiquated OEM fan clutch works. So is
>> the
>> > Benz unit a good idea. And not just another gig it? YOU BET. Then on
>> top
>> > of that. You can turn it on as YOU want. Then there's a light to tell
>> you
>> > when it's on. I love my 403. And want to keep it as healthy as possible.
>> > Thus helping to keep us from ending up at the side of the road. Bob
>> > Dunahugh 78 Royale
>> >
>> >
>> > ________________________________
>> > From: Bob Dunahugh
>> > Sent: Saturday, February 24, 2018 4:27 PM
>> > To: gmclist
>> > Subject: Anyone install the Mercedes Benz electrically controlled fan
>> > clutch on a 403 yet?
>> >
>> >
>> > I know Matt Collie has. And he has this answer. The Benz unit locates
>> > the back of it's fan at the front of were the stock fan is located. It's
>> > looking to me that this puts the Benz fan well into the stock fan
>> shroud's
>> > cone area. Thus I'm thinking that I don't have to cut my now two piece
>> > plastic fan shroud. The Benz fan has about a 1" larger dia. Bob
>> Dunahugh
>> > 78 Royale
>> >
>> > _______________________________________________
>> > GMCnet mailing list
>> > Unsubscribe or Change List Options:
>> > http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>> >
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
>
>
>
> --
> Jim Kanomata
> Applied/GMC, Newark,CA
> jimk
> http://www.appliedgmc.com
> 1-800-752-7502
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502

 

[Bob Dunahugh]

James. Reliability will not be an issue with these fan clutches. This tech=
nology maybe new in our GMC world. But GM has had a fan clutch similar to t=
hese for about the last 15 years on their trucks. And I think Benz has been=
doing it for about the same length of time. I'm not totally sure on the Be=
nz time. The point here is that it's a well proven system. I can't think of=
a down side. Bolts to our stock water pump. Then connect some wires. Look=
s like I don't even have to modify my fan shroud. Tom Pryor did a great job=
. And my thanks to Tom. Bob Dunahugh 78 Royale ____________________=
____________ From: Bob Dunahugh Sent: Sunday, Fe=
bruary 25, 2018 11:39 AM To: gmclist Subject: The reali=
ty of cooling timing in keeping your engine cooled better under heavier loa=
d condisions. One big advantage. Is that these Benz units are PROAC=
TIVE as far as when to engage. As they react to your engine block temps a=
s the water comes out of the cylinder heads. And is heading TO the radiato=
r. With the REACTIVE OEM unit. (1) First you have to get the engine block=
hotter then normal. (2) Then this hotter then normal water needs to get th=
e radiator. (3) Next this hotter then normal water needs to heat up our ve=
ry large radiator. (4) Then the hotter then normal radiator needs to heat =
up all the air going true it to hotter then normal temps. (5) Next all thi=
s hotter then normal air needs to heat up the fan clutch. So that the fan c=
lutch finally finds out that there's an over heating problem that started =
sometime ago. That's how our antiquated OEM fan clutch works. So is the =
Benz unit a good idea. And not just another gig it? YOU BET. Then on top o=
f that. You can turn it on as YOU want. Then there's a light to tell you wh=
en it's on. I love my 403. And want to keep it as healthy as possible. Thus=
helping to keep us from ending up at the side of the road. Bob Dunahugh=
78 Royale ________________________________ From: Bob Dunahugh Sent: Saturday, February 24, 2018 4:27 PM To: gmc=
list Subject: Anyone install the Mercedes Benz electrical=
ly controlled fan clutch on a 403 yet? I know Matt Collie has. And=
he has this answer. The Benz unit locates the back of it's fan at the fro=
nt of were the stock fan is located. It's looking to me that this puts the =
Benz fan well into the stock fan shroud's cone area. Thus I'm thinking tha=
t I don't have to cut my now two piece plastic fan shroud. The Benz fan =
has about a 1" larger dia. Bob Dunahugh 78 Royale

 

[bdub1]

What about fan belt installation? Does the fan have to come off to replace
a belt?

bdub

-----Original Message-----
From: Gmclist On Behalf Of Bob Dunahugh
Sent: Sunday, February 25, 2018 9:12 PM
Subject: Re: [GMCnet] The reality of cooling timing in keeping your engine
cooled better under heavier load condisions.

James. Reliability will not be an issue with these fan clutches. This
technology maybe new in our GMC world. But GM has had a fan clutch similar
to these for about the last 15 years on their trucks. And I think Benz has
been doing it for about the same length of time. I'm not totally sure on the
Benz time. The point here is that it's a well proven system. I can't think
of a down side. Bolts to our stock water pump. Then connect some wires.
Looks like I don't even have to modify my fan shroud. Tom Pryor did a great
job. And my thanks to Tom.

 

[jim kanomata1]

Billy,
The belts will not be effected as we do not tenickly touch the pully.

> What about fan belt installation? Does the fan have to come off to replace
> a belt?
>
> bdub
>
>
> -----Original Message-----
> From: Gmclist On Behalf Of Bob Dunahugh
> Sent: Sunday, February 25, 2018 9:12 PM
> Subject: Re: [GMCnet] The reality of cooling timing in keeping your engine
> cooled better under heavier load condisions.
>
> James. Reliability will not be an issue with these fan clutches. This
> technology maybe new in our GMC world. But GM has had a fan clutch similar
> to these for about the last 15 years on their trucks. And I think Benz has
> been doing it for about the same length of time. I'm not totally sure on
> the
> Benz time. The point here is that it's a well proven system. I can't think
> of a down side. Bolts to our stock water pump. Then connect some wires.
> Looks like I don't even have to modify my fan shroud. Tom Pryor did a great
> job. And my thanks to Tom.
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Jim Kanomata
Applied/GMC, Newark,CA
jimk
http://www.appliedgmc.com
1-800-752-7502

 

[bdub1]

So if I break a belt, I can install a new one just as easily as before?

bdub

> Billy,
> The belts will not be effected as we do not tenickly touch the pully.
>

>
> > What about fan belt installation? Does the fan have to come off to
> replace
> > a belt?
>

 

[les burt]

I have no experience with the specific fan clutch being used, but I do know that the Ford powerstroke diesels came with a similar fan clutch, and they are known to fail, but not with excessive regularity. IMO the upgrade is still leaps ahead of the old fan clutch technology. I’ll be doing this upgrade at some point in the future.

Les Burt
Montreal
'75 Eleganza 26'

>
> So if I break a belt, I can install a new one just as easily as before?
>
> bdub
>

>>
>> Billy,
>> The belts will not be effected as we do not tenickly touch the pully.
>>

>>>
>>> What about fan belt installation? Does the fan have to come off to
>> replace
>>> a belt?
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org

 

[Matt Colie]

> So if I break a belt, I can install a new one just as easily as before?
>
> bdub

Billy,

That will be installation dependent.
As built, I could not service any FEAD belt without removing at least the fan blade. Nowhere was there tip clearance to get a belt through.
As none of my belts are too small to go over the fan, you should be able to do a belt service.

Matt
--
Matt & Mary Colie - '73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan
OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Twixt A2 and Detroit

 

[Bob Dunahugh]

I read James e-mail at 11:16 CST on the digest posting. I went out, and pu=
lled the Benz fan out by 11:28 CST. Grabbed the stock GMC unit. Then checke=
d the weights. Stock 6.8 lbs. The Benz came in at 8.1 lbs. Thus about 22 o=
z. Bob Dunatugh ________________________________ From: Bob Dunah=
ugh Sent: Sunday, February 25, 2018 9:12 PM To: =
gmclist Subject: RE:The reality of cooling timing in keep=
ing your engine cooled better under heavier load condisions. James.=
Reliability will not be an issue with these fan clutches. This technology=
maybe new in our GMC world. But GM has had a fan clutch similar to these f=
or about the last 15 years on their trucks. And I think Benz has been doing=
it for about the same length of time. I'm not totally sure on the Benz tim=
e. The point here is that it's a well proven system. I can't think of a dow=
n side. Bolts to our stock water pump. Then connect some wires. Looks like=
I don't even have to modify my fan shroud. Tom Pryor did a great job. And =
my thanks to Tom. Bob Dunahugh 78 Royale __________________________=
______ From: Bob Dunahugh Sent: Sunday, February=
25, 2018 11:39 AM To: gmclist Subject: The reality of =
cooling timing in keeping your engine cooled better under heavier load cond=
isions. One big advantage. Is that these Benz units are PROACTIVE a=
s far as when to engage. As they react to your engine block temps as the =
water comes out of the cylinder heads. And is heading TO the radiator. Wit=
h the REACTIVE OEM unit. (1) First you have to get the engine block hotte=
r then normal. (2) Then this hotter then normal water needs to get the radi=
ator. (3) Next this hotter then normal water needs to heat up our very lar=
ge radiator. (4) Then the hotter then normal radiator needs to heat up all=
the air going true it to hotter then normal temps. (5) Next all this hott=
er then normal air needs to heat up the fan clutch. So that the fan clutch =
finally finds out that there's an over heating problem that started someti=
me ago. That's how our antiquated OEM fan clutch works. So is the Benz u=
nit a good idea. And not just another gig it? YOU BET. Then on top of that=
. You can turn it on as YOU want. Then there's a light to tell you when it'=
s on. I love my 403. And want to keep it as healthy as possible. Thus helpi=
ng to keep us from ending up at the side of the road. Bob Dunahugh 78 R=
oyale ________________________________ From: Bob Dunahugh Sent: Saturday, February 24, 2018 4:27 PM To: gmclist=
ist.gmcnet.org Subject: Anyone install the Mercedes Benz electrically con=
trolled fan clutch on a 403 yet? I know Matt Collie has. And he ha=
s this answer. The Benz unit locates the back of it's fan at the front of =
were the stock fan is located. It's looking to me that this puts the Benz f=
an well into the stock fan shroud's cone area. Thus I'm thinking that I do=
n't have to cut my now two piece plastic fan shroud. The Benz fan has ab=
out a 1" larger dia. Bob Dunahugh 78 Royale

 

[Bob Dunahugh]

I checked the fan with a Hayden fan clutch. So I just checked the weight o=
f the stock fan, and original GM fan clutch. That came in at 8.7 lbs. That=
's a half pound more then the Benz unit. I see this Benz unit as a well te=
sted piece that has been on their trucks for over 10 years. So it's not an =
after market product designed in China. I just don't see it going into =
the radiator by how heavy it's construction. Bob Dunahugh _________=
_______________________ From: Bob Dunahugh Sent:=
Monday, February 26, 2018 11:38 AM To: gmclist Subject=
: RE: RE:The reality of cooling timing in keeping your engine cooled better=
under heavier load condisions. I read James e-mail at 11:16 CST o=
n the digest posting. I went out, and pulled the Benz fan out by 11:28 CST.=
Grabbed the stock GMC unit. Then checked the weights. Stock 6.8 lbs. The =
Benz came in at 8.1 lbs. Thus about 22 oz. Bob Dunatugh __________=
______________________ From: Bob Dunahugh Sent: =
Sunday, February 25, 2018 9:12 PM To: gmclist Subject: =
RE:The reality of cooling timing in keeping your engine cooled better under=
heavier load condisions. James. Reliability will not be an issue w=
ith these fan clutches. This technology maybe new in our GMC world. But GM=
has had a fan clutch similar to these for about the last 15 years on their=
trucks. And I think Benz has been doing it for about the same length of ti=
me. I'm not totally sure on the Benz time. The point here is that it's a we=
ll proven system. I can't think of a down side. Bolts to our stock water p=
ump. Then connect some wires. Looks like I don't even have to modify my fan=
shroud. Tom Pryor did a great job. And my thanks to Tom. Bob Dunahugh 78 R=
oyale ________________________________ From: Bob Dunahugh Sent: Sunday, February 25, 2018 11:39 AM To: gmclist=
st.gmcnet.org Subject: The reality of cooling timing in keeping your engi=
ne cooled better under heavier load condisions. One big advantage. =
Is that these Benz units are PROACTIVE as far as when to engage. As they r=
eact to your engine block temps as the water comes out of the cylinder hea=
ds. And is heading TO the radiator. With the REACTIVE OEM unit. (1) Firs=
t you have to get the engine block hotter then normal. (2) Then this hotter=
then normal water needs to get the radiator. (3) Next this hotter then no=
rmal water needs to heat up our very large radiator. (4) Then the hotter t=
hen normal radiator needs to heat up all the air going true it to hotter th=
en normal temps. (5) Next all this hotter then normal air needs to heat up=
the fan clutch. So that the fan clutch finally finds out that there's an =
over heating problem that started sometime ago. That's how our antiquated =
OEM fan clutch works. So is the Benz unit a good idea. And not just anoth=
er gig it? YOU BET. Then on top of that. You can turn it on as YOU want. T=
hen there's a light to tell you when it's on. I love my 403. And want to ke=
ep it as healthy as possible. Thus helping to keep us from ending up at th=
e side of the road. Bob Dunahugh 78 Royale _____________________=
___________ From: Bob Dunahugh Sent: Saturday, F=
ebruary 24, 2018 4:27 PM To: gmclist Subject: Anyone in=
stall the Mercedes Benz electrically controlled fan clutch on a 403 yet? =
I know Matt Collie has. And he has this answer. The Benz unit locat=
es the back of it's fan at the front of were the stock fan is located. It's=
looking to me that this puts the Benz fan well into the stock fan shroud'=
s cone area. Thus I'm thinking that I don't have to cut my now two piece =
plastic fan shroud. The Benz fan has about a 1" larger dia. Bob Dunahugh=
78 Royale

 

[Bob Dunahugh]

There are owners out there that would fine this water pump info interest=
ing, and of value. But may miss this. As the subject changed. But not the s=
ubject heading. Bob Dunahugh ________________________________ From: =
Bob Dunahugh Sent: Monday, February 26, 2018 1:52 =
PM To: gmclist Subject: RE:The reality of cooling timin=
g in keeping your engine cooled better under heavier load condisions. =
I checked the fan with a Hayden fan clutch. So I just checked the weigh=
t of the stock fan, and original GM fan clutch. That came in at 8.7 lbs. T=
hat's a half pound more then the Benz unit. I see this Benz unit as a well=
tested piece that has been on their trucks for over 10 years. So it's not =
an after market product designed in China. I just don't see it going int=
o the radiator by how heavy it's construction. Bob Dunahugh ______=
__________________________ From: Bob Dunahugh Se=
nt: Monday, February 26, 2018 11:38 AM To: gmclist Subj=
ect: RE: RE:The reality of cooling timing in keeping your engine cooled bet=
ter under heavier load condisions. I read James e-mail at 11:16 CS=
T on the digest posting. I went out, and pulled the Benz fan out by 11:28 C=
ST. Grabbed the stock GMC unit. Then checked the weights. Stock 6.8 lbs. T=
he Benz came in at 8.1 lbs. Thus about 22 oz. Bob Dunatugh _______=
_________________________ From: Bob Dunahugh Sen=
t: Sunday, February 25, 2018 9:12 PM To: gmclist Subjec=
t: RE:The reality of cooling timing in keeping your engine cooled better un=
der heavier load condisions. James. Reliability will not be an issu=
e with these fan clutches. This technology maybe new in our GMC world. But=
GM has had a fan clutch similar to these for about the last 15 years on th=
eir trucks. And I think Benz has been doing it for about the same length of=
time. I'm not totally sure on the Benz time. The point here is that it's a=
well proven system. I can't think of a down side. Bolts to our stock wate=
r pump. Then connect some wires. Looks like I don't even have to modify my =
fan shroud. Tom Pryor did a great job. And my thanks to Tom. Bob Dunahugh 7=
8 Royale ________________________________ From: Bob Dunahugh Sent: Sunday, February 25, 2018 11:39 AM To: gmclist=
@list.gmcnet.org Subject: The reality of cooling timing in keeping your e=
ngine cooled better under heavier load condisions. One big advantag=
e. Is that these Benz units are PROACTIVE as far as when to engage. As the=
y react to your engine block temps as the water comes out of the cylinder =
heads. And is heading TO the radiator. With the REACTIVE OEM unit. (1) F=
irst you have to get the engine block hotter then normal. (2) Then this hot=
ter then normal water needs to get the radiator. (3) Next this hotter then=
normal water needs to heat up our very large radiator. (4) Then the hotte=
r then normal radiator needs to heat up all the air going true it to hotter=
then normal temps. (5) Next all this hotter then normal air needs to heat=
up the fan clutch. So that the fan clutch finally finds out that there's =
an over heating problem that started sometime ago. That's how our antiquate=
d OEM fan clutch works. So is the Benz unit a good idea. And not just an=
other gig it? YOU BET. Then on top of that. You can turn it on as YOU want=
. Then there's a light to tell you when it's on. I love my 403. And want to=
keep it as healthy as possible. Thus helping to keep us from ending up at=
the side of the road. Bob Dunahugh 78 Royale __________________=
______________ From: Bob Dunahugh Sent: Saturday=
, February 24, 2018 4:27 PM To: gmclist Subject: Anyone=
install the Mercedes Benz electrically controlled fan clutch on a 403 yet?=
I know Matt Collie has. And he has this answer. The Benz unit lo=
cates the back of it's fan at the front of were the stock fan is located. I=
t's looking to me that this puts the Benz fan well into the stock fan shro=
ud's cone area. Thus I'm thinking that I don't have to cut my now two pie=
ce plastic fan shroud. The Benz fan has about a 1" larger dia. Bob Dunah=
ugh 78 Royale

 

[Jim Hupy]

Bob, I am sorry. It looks like I de-railed the subject again with my
comments about water pumps. It kind of grew wings and flew off in a
different direction. All good, but hard to find. I noticed that there were
several separate threads going at the same time on the Benz fan clutch.
That added to the confusion, I think.
Jim Hupy
Salem, Or

>
> There are owners out there that would fine this water pump info
> interesting, and of value. But may miss this. As the subject changed. But
> not the subject heading. Bob Dunahugh
>
> ________________________________
> From: Bob Dunahugh
> Sent: Monday, February 26, 2018 1:52 PM
> To: gmclist
> Subject: RE:The reality of cooling timing in keeping your engine cooled
> better under heavier load condisions.
>
>
> I checked the fan with a Hayden fan clutch. So I just checked the weight
> of the stock fan, and original GM fan clutch. That came in at 8.7 lbs.
> That's a half pound more then the Benz unit. I see this Benz unit as a
> well tested piece that has been on their trucks for over 10 years. So it's
> not an after market product designed in China. I just don't see it going
> into the radiator by how heavy it's construction. Bob Dunahugh
>
>
> ________________________________
> From: Bob Dunahugh
> Sent: Monday, February 26, 2018 11:38 AM
> To: gmclist
> Subject: RE: RE:The reality of cooling timing in keeping your engine
> cooled better under heavier load condisions.
>
>
> I read James e-mail at 11:16 CST on the digest posting. I went out, and
> pulled the Benz fan out by 11:28 CST. Grabbed the stock GMC unit. Then
> checked the weights. Stock 6.8 lbs. The Benz came in at 8.1 lbs. Thus
> about 22 oz. Bob Dunatugh
>
>
> ________________________________
> From: Bob Dunahugh
> Sent: Sunday, February 25, 2018 9:12 PM
> To: gmclist
> Subject: RE:The reality of cooling timing in keeping your engine cooled
> better under heavier load condisions.
>
>
> James. Reliability will not be an issue with these fan clutches. This
> technology maybe new in our GMC world. But GM has had a fan clutch similar
> to these for about the last 15 years on their trucks. And I think Benz has
> been doing it for about the same length of time. I'm not totally sure on
> the Benz time. The point here is that it's a well proven system. I can't
> think of a down side. Bolts to our stock water pump. Then connect some
> wires. Looks like I don't even have to modify my fan shroud. Tom Pryor did
> a great job. And my thanks to Tom. Bob Dunahugh 78 Royale
>
>
> ________________________________
> From: Bob Dunahugh
> Sent: Sunday, February 25, 2018 11:39 AM
> To: gmclist
> Subject: The reality of cooling timing in keeping your engine cooled
> better under heavier load condisions.
>
>
> One big advantage. Is that these Benz units are PROACTIVE as far as when
> to engage. As they react to your engine block temps as the water comes
> out of the cylinder heads. And is heading TO the radiator. With the
> REACTIVE OEM unit. (1) First you have to get the engine block hotter then
> normal. (2) Then this hotter then normal water needs to get the radiator.
> (3) Next this hotter then normal water needs to heat up our very large
> radiator. (4) Then the hotter then normal radiator needs to heat up all
> the air going true it to hotter then normal temps. (5) Next all this
> hotter then normal air needs to heat up the fan clutch. So that the fan
> clutch finally finds out that there's an over heating problem that started
> sometime ago. That's how our antiquated OEM fan clutch works. So is the
> Benz unit a good idea. And not just another gig it? YOU BET. Then on top
> of that. You can turn it on as YOU want. Then there's a light to tell you
> when it's on. I love my 403. And want to keep it as healthy as possible.
> Thus helping to keep us from ending up at the side of the road. Bob
> Dunahugh 78 Royale
>
>
> ________________________________
> From: Bob Dunahugh
> Sent: Saturday, February 24, 2018 4:27 PM
> To: gmclist
> Subject: Anyone install the Mercedes Benz electrically controlled fan
> clutch on a 403 yet?
>
>
> I know Matt Collie has. And he has this answer. The Benz unit locates
> the back of it's fan at the front of were the stock fan is located. It's
> looking to me that this puts the Benz fan well into the stock fan shroud's
> cone area. Thus I'm thinking that I don't have to cut my now two piece
> plastic fan shroud. The Benz fan has about a 1" larger dia. Bob Dunahugh
> 78 Royale
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

 

[Bob Dunahugh]

Not a problem James. We've all done it. The water pump bearing info was =
great. I certainly learned something. We have maybe 12 to 15 that post. Bu=
t I understand there are a lot out there that don't. I try to post somethin=
g to them at times. Some may have missed the pump bearing info. Bob Dunah=
ugh ________________________________ From: Bob Dunahugh Sent: Tuesday, February 27, 2018 12:26 PM To: gmclist=
mcnet.org Subject: RE:The reality of cooling timing in keeping your engin=
e cooled better under heavier load condisions. There are owners =
out there that would fine this water pump info interesting, and of value. B=
ut may miss this. As the subject changed. But not the subject heading. Bob =
Dunahugh ________________________________ From: Bob Dunahugh Sent: Monday, February 26, 2018 1:52 PM To: gmclist=
t.gmcnet.org Subject: RE:The reality of cooling timing in keeping your en=
gine cooled better under heavier load condisions. I checked the fan=
with a Hayden fan clutch. So I just checked the weight of the stock fan, =
and original GM fan clutch. That came in at 8.7 lbs. That's a half pound m=
ore then the Benz unit. I see this Benz unit as a well tested piece that h=
as been on their trucks for over 10 years. So it's not an after market pro=
duct designed in China. I just don't see it going into the radiator by h=
ow heavy it's construction. Bob Dunahugh __________________________=
______ From: Bob Dunahugh Sent: Monday, February=
26, 2018 11:38 AM To: gmclist Subject: RE: RE:The real=
ity of cooling timing in keeping your engine cooled better under heavier lo=
ad condisions. I read James e-mail at 11:16 CST on the digest post=
ing. I went out, and pulled the Benz fan out by 11:28 CST. Grabbed the stoc=
k GMC unit. Then checked the weights. Stock 6.8 lbs. The Benz came in at 8=
.1 lbs. Thus about 22 oz. Bob Dunatugh ___________________________=
_____ From: Bob Dunahugh Sent: Sunday, February =
25, 2018 9:12 PM To: gmclist Subject: RE:The reality of=
cooling timing in keeping your engine cooled better under heavier load con=
disions. James. Reliability will not be an issue with these fan clu=
tches. This technology maybe new in our GMC world. But GM has had a fan cl=
utch similar to these for about the last 15 years on their trucks. And I th=
ink Benz has been doing it for about the same length of time. I'm not total=
ly sure on the Benz time. The point here is that it's a well proven system.=
I can't think of a down side. Bolts to our stock water pump. Then connect=
some wires. Looks like I don't even have to modify my fan shroud. Tom Pryo=
r did a great job. And my thanks to Tom. Bob Dunahugh 78 Royale ___=
_____________________________ From: Bob Dunahugh =
Sent: Sunday, February 25, 2018 11:39 AM To: gmclist=
Subject: The reality of cooling timing in keeping your engine cooled bet=
ter under heavier load condisions. One big advantage. Is that these=
Benz units are PROACTIVE as far as when to engage. As they react to your =
engine block temps as the water comes out of the cylinder heads. And is h=
eading TO the radiator. With the REACTIVE OEM unit. (1) First you have to=
get the engine block hotter then normal. (2) Then this hotter then normal =
water needs to get the radiator. (3) Next this hotter then normal water ne=
eds to heat up our very large radiator. (4) Then the hotter then normal ra=
diator needs to heat up all the air going true it to hotter then normal tem=
ps. (5) Next all this hotter then normal air needs to heat up the fan clut=
ch. So that the fan clutch finally finds out that there's an over heating =
problem that started sometime ago. That's how our antiquated OEM fan clutc=
h works. So is the Benz unit a good idea. And not just another gig it? Y=
OU BET. Then on top of that. You can turn it on as YOU want. Then there's a=
light to tell you when it's on. I love my 403. And want to keep it as heal=
thy as possible. Thus helping to keep us from ending up at the side of the=
road. Bob Dunahugh 78 Royale ________________________________=
From: Bob Dunahugh Sent: Saturday, February 24,=
2018 4:27 PM To: gmclist Subject: Anyone install the M=
ercedes Benz electrically controlled fan clutch on a 403 yet? I kno=
w Matt Collie has. And he has this answer. The Benz unit locates the back=
of it's fan at the front of were the stock fan is located. It's looking to=
me that this puts the Benz fan well into the stock fan shroud's cone area=
. Thus I'm thinking that I don't have to cut my now two piece plastic fa=
n shroud. The Benz fan has about a 1" larger dia. Bob Dunahugh 78 Royale=