Don,
I recently did away with my original engine fan and installed a 16 inch
electric "puller" fan from J.C.Whitney on the back of the radiator. It
has an adjustable thermostat and a sensor that is mounted close to the
upper radiator hose. I added an illuminated manual switch as an
override, mainly to use after shutting the 455 down to cool off the
engine compartment. So far it does a grand job. Leaving the fan
running for about 5 min. after shutdown cools the compartment so much
that I no longer have the "dragging starter" syndrome when attempting to
re-start a hot engine. You'll find no add-on side vents on my coach, as
they are not needed.
I paid about $100 for the fan, but Whitney has lowered the price $11!
I'll let everyone know if I have any problems, but so far so good.
Norm
'76 Glenbrook
>
> Date: Mon, 7 Dec 1998 00:47:01 -0000
> From: "Donald W. Miller"
> Subject: Re: GMC: Radiator Cores and Fans
>
> Our 75 Glennwood only has 26,000 miles, but like me, it's age is certainly
> showing.
>
> The radiator has a minor leak. Several days ago, I cut the radiator support
> sides near the bottom and dropped the radiator out the bottom.
>
> Both rusty transmission cooling lines ruptured when I moved them SLIGHTLY to
> take out the fan shroud.
>
> The engine oil cooler lines were brittle too, both the steel tubing and the
> rubber portions.
>
> I am really lucky they didn't fail on the delivery trip home.
>
> I probably could patch up the old radiator core, but considering it's age,
> I'll probably have a new core installed.
>
> Are better cores available than this original type?
>
> Also, I know Heinz and others are using electric fans to supplement
> cooling.
>
> Has anyone removed the engine driven fan and replaced it with multiple large
> electric fans?
>
> Don
> Shenandoah Valley of Virginia
>
I recently did away with my original engine fan and installed a 16 inch
electric "puller" fan from J.C.Whitney on the back of the radiator. It
has an adjustable thermostat and a sensor that is mounted close to the
upper radiator hose. I added an illuminated manual switch as an
override, mainly to use after shutting the 455 down to cool off the
engine compartment. So far it does a grand job. Leaving the fan
running for about 5 min. after shutdown cools the compartment so much
that I no longer have the "dragging starter" syndrome when attempting to
re-start a hot engine. You'll find no add-on side vents on my coach, as
they are not needed.
I paid about $100 for the fan, but Whitney has lowered the price $11!
I'll let everyone know if I have any problems, but so far so good.
Norm
'76 Glenbrook
>
> Date: Mon, 7 Dec 1998 00:47:01 -0000
> From: "Donald W. Miller"
> Subject: Re: GMC: Radiator Cores and Fans
>
> Our 75 Glennwood only has 26,000 miles, but like me, it's age is certainly
> showing.
>
> The radiator has a minor leak. Several days ago, I cut the radiator support
> sides near the bottom and dropped the radiator out the bottom.
>
> Both rusty transmission cooling lines ruptured when I moved them SLIGHTLY to
> take out the fan shroud.
>
> The engine oil cooler lines were brittle too, both the steel tubing and the
> rubber portions.
>
> I am really lucky they didn't fail on the delivery trip home.
>
> I probably could patch up the old radiator core, but considering it's age,
> I'll probably have a new core installed.
>
> Are better cores available than this original type?
>
> Also, I know Heinz and others are using electric fans to supplement
> cooling.
>
> Has anyone removed the engine driven fan and replaced it with multiple large
> electric fans?
>
> Don
> Shenandoah Valley of Virginia
>
