hot water engine heater hoses

C

chris izzig

New member
Dec 7, 1998
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my hoses to the hot water heater from the engine are missing. can anyone tell me where they run from the hot water haeter and connect into the engine

thanx chris 75 gb

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The hoses on my Eleganza???? ran down the outside of the frame attached to the
bottom of the floor down the passenger side. They entered the coach just in front
of the rear fender well through two holes surrounded by rubber grommets. Down the
top of the fender and into the water tank under the sink. I sure am glad I don't
have them any more. Darren

>
> tell me where they run from the hot water heater and connect into the engine
>
> thanx Chris 75 gb >>
>
> Chris -- First, not all hot water heaters have the heating loop built into
> them. If your heater does, then the hoses go from a tee in the hose going to
> the front heater (placed by the passenger side front top of the engine) and
> from a tee placed by the heater return line at the passenger side rear top of
> the engine. The hoses go down from the engine and along the bottom of the
> flooring outside of the frame then up through the floor by the wheel housing,
> behind the sink cabinet and to the heater (assuming you have the side wet
> bath module). This puts the water heater in parallel with the engine heater.
> I forget where they go up through the floor but can get measurements for you
> if you need it. A suggestion: if you don't want to have heat to the water
> heater, for example in the hot summer time, put a valve in the line. A
> small globe valve with a lever handle works fine.
>
> Emery Stora
> 77 Kingsley
> Santa Fe, NM
 
If possible, you could look at another coach. It would show clearly where the
hoses go. Do you have a hot water tank behind the bathroom? If you are coming
to Albuq for the Oct Rally, I would be glad to show you.
Al

>
> tell me where they run from the hot water heater and connect into the engine
>
> thanx Chris 75 gb >>
>
> Chris -- First, not all hot water heaters have the heating loop built into
> them. If your heater does, then the hoses go from a tee in the hose going to
> the front heater (placed by the passenger side front top of the engine) and
> from a tee placed by the heater return line at the passenger side rear top of
> the engine. The hoses go down from the engine and along the bottom of the
> flooring outside of the frame then up through the floor by the wheel housing,
> behind the sink cabinet and to the heater (assuming you have the side wet
> bath module). This puts the water heater in parallel with the engine heater.
> I forget where they go up through the floor but can get measurements for you
> if you need it. A suggestion: if you don't want to have heat to the water
> heater, for example in the hot summer time, put a valve in the line. A
> small globe valve with a lever handle works fine.
>
> Emery Stora
> 77 Kingsley
> Santa Fe, NM
 
As I have senior moments, I would like to offer the following: From the power
that goes to the heater, I installed a 120v mini light that goes on when the
heater is on. In the event that you do not have water in the tank, you will
burn out the element. I have a visual way to tell when the heater is on. If
the light is on and no water, I have a way to turn it off before damage occurs.
I mounted the light just above the height of the stove on the wall to the left
of the stove top. It is visible from the front through the rear view mirror.
Also when the Gen set is on, I don't want or need to have the heater on.
al

>
> with this puppy shutting down because the water from the engine
> gets the water heater water to hot? Thanks.
>
> Take Care
> Arch >>
>
> Hi Arch -- mine has a reset button on it but I've never had a problem with
> the heat from the engine tripping it. In fact, the heat from the engine is
> not really as hot as the water in the heater when its on electric. The hoses
> running under the floor outside of the frame transfer a lot of heat to the
> air before it reaches the heater. I suspect that the reason for the reset
> button is just in case someone turns on the water heater without any water in
> it.
>
> Emery Stora
> 77 Kingsley
> Santa Fe, NM
 
I believe that the switch can only be tripped when the Onan is running (you
are operating the house A/C while on the road).

>Emery
>
>Thanks so much for your reply. I know some things but I sure dont know
>what you guys who have lived with these ladies KNOW. Thanks.
>
>Take Care
>Arch 76 GB IL
>
>In a message dated 4/10/99 9:15:23 PM Central Daylight Time,

>
>>
>> Hi Arch -- mine has a reset button on it but I've never had a problem with
>> the heat from the engine tripping it. In fact, the heat from the engine
>is
>>
>> not really as hot as the water in the heater when its on electric. The
>> hoses
>> running under the floor outside of the frame transfer a lot of heat to the
>> air before it reaches the heater. I suspect that the reason for the reset
>> button is just in case someone turns on the water heater without any water
>> in
>> it.
>>
>
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach
 
Just adding my .02 to your heater hose question. I used Gates green stripe
HD hose, you can find out more here:

http://www.gates.com/coolanthose.htm

Also see this interesting piece on why coolant hoses die. It may be pure
bull, but interesting.

http://www.gates.com/hosefail.html

Previously, I had used Insulon (that's the product name) hose, but I don't
think that it's made anymore.

You might also consider putting a valve on the supply line that feeds the HW
heat exchanger. It will help keep the rear of the coach cooler in the
summer. That water heater (unless you insulate it the way Arch did) will
throw off a lot of heat into the bathroom.

Mark
'77 Kingsley

mailto:mgrady

- - - - - - - - - - - - -
Original message:

> In a message dated 4/10/99 9:06:08 AM Central Daylight Time,

>
> my hoses to the hot water heater from the engine
> are missing.
> can anyone tell me where they run from the hot
> water heater and connect into the engine
>
> thanx chris 75 gb
 
Hey Arch,
I'm in the same boat. I thought I would
have mine on the road last fall. No such
luck. I have much to do..Planning on
driving it to the Keys in May. Times
running out.Heading to Home Depot in a
few minutes.
See Ya,
Rob Teed 74 Painted Desert

> -----Original Message-----
> From: owner-gmcmotorhome
> [mailto:owner-gmcmotorhome]On Behalf Of Gcbr
> Sent: Sunday, April 11, 1999 9:38 AM
> To: gmcmotorhome
> Subject: Re: GMC: hot water engine heater hoses
>
>
> Thanks all
>
> I know a lot of the theory----but it sure is nice to hear from the PROS.
> Thanks to all of you who took a shot at this one. From what all of you
> have said think I will look at putting in a valve in the line.
> Darn aint on
> the road yet and I am fixing what I have already fixed. Thanks all.
>
> Take Care
> Arch 76 GB IL
>
> In a message dated 4/11/99 5:37:23 AM Central Daylight Time, HLBF

>
> >
> > The reset button is for electrical short or overload - there's
> a pop-off
> > relief valve to take care of overheating the water (and you
> won't need a
> > light to know when it goes off). I left mine turned on while
> traveling
> last
> >
> > summer, stopped for gas, and after filling up, checking
> everything, and
> > stretching the old legs, all hell broke loose outside the
> passenger-side
> > bogie - screaming steam for 10 -15 minutes. Gotta put a valve on that
> dude,
> > mine gets so hot, even the cold water tap runs hot when first
> turned on.
> >
> > Lanier
> >
>
>
 
Isn't there supposed to be a check valve to keep the hot water from going back
to the cold water side?

I think mine has one and someplace I read about the check valve.

I used to have problems with the water heater, but they all went away when I
replaced the element, relief valve and the thermostat. I got all the parts from
Home Depot and they were pretty cheap!

I'm going to add the "heater control valves from an early Cadillac application
('60-63)
to control the motor-aid heat exchanger" that Mark mentioned.

Richard Waters, 76 PB, Troy, MI

> In a message dated 4/10/99 11:02:44 PM Central Daylight Time, Gcbr

>
> >
> > > Hi Arch -- mine has a reset button on it but I've never had a problem
> > with
> > > the heat from the engine tripping it. In fact, the heat from the
> engine
> >
> > is
> >
>
> The reset button is for electrical short or overload - there's a pop-off
> relief valve to take care of overheating the water (and you won't need a
> light to know when it goes off). I left mine turned on while traveling last
> summer, stopped for gas, and after filling up, checking everything, and
> stretching the old legs, all hell broke loose outside the passenger-side
> bogie - screaming steam for 10 -15 minutes. Gotta put a valve on that dude,
> mine gets so hot, even the cold water tap runs hot when first turned on.
>
> Lanier
 
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