overheating the c 2 crate

[John H.]

Re: overheating the c 2 crate

There are two different water pumps for 350 crate engines - one with conventional CW rotation, and one with CCW rotation for use with the single-belt system; which one does your engine have?

[Francis F.]

Re: overheating the c 2 crate

John,the new water pump came from ZIP.prod stated orig.to 327 /350 hp.shohld be correct.
Francis

[Francis F.]

Re: overheating the c 2 crate

Keith,yes .."I R gun"confirms gauge is within a 5*range.
last test fill intake manifold before re installing t-stat,run eng with cap off,uep she dumped some fluid while seeking the proper level.rad.inlet temp 195,outlet temp.135*.
on the way to get a better dial back timming lite.
note:temp better but running @ 205/210*
Francis

[Ralph E.]

Re: overheating the c 2 crate

Francis, sounds like you have some kind of restriction in the cooling system.
You said it was fine before. Is that with the other engine or with the crate engine.
How is the lower radiator hose, is it collapsing, could it be restricting the coolant flow.
Just my $.02

[Francis F.]

Re: overheating the c 2 crate

Ralph,yes seemed to be ok with other eng.,,rad hoses are new and look ok,I am now considering a radiator up-grade.checking B T U capacities a ainst exist copper/brass unit from the 90's.
I also noted in order to hold the temp between 200-225* the use of the cars heater on hi was necessary.
Francis

[Francis F.]

Re: overheating the c 2 crate

John,yes you are correct,the eng.I purchased came without a water pump,i got one from our friends at Zip prod.#M-100..to be correct for S/B eng.C W rotation.and that is the way she is rotating..I beginning to feel tha slightly larger HP eng. has added a BTU load to the cooling system that the existing radiator can not deal with.Now comes the fork in the road again,which replacement unit to get.
Dewitts exact repo. rated_________ BTU's
or the less expensive direct fit alum.offered by ZIP,rated ????? ______BTU.
any suggestions,originality has fallen out of the picture,funcitio is parimont,but that Dewitts sure looks great,does it have enough BTU ability :??
Francis Yougie said "when you come to a fork in the road TAKE IT "

[Donald O.]

Re: overheating the c 2 crate

John,yes you are correct,the eng.I purchased came without a water pump,i got one from our friends at Zip prod.#M-100..to be correct for S/B eng.C W rotation.and that is the way she is rotating..I beginning to feel tha slightly larger HP eng. has added a BTU load to the cooling system that the existing radiator can not deal with.Now comes the fork in the road again,which replacement unit to get.
Dewitts exact repo. rated_________ BTU's
or the less expensive direct fit alum.offered by ZIP,rated ????? ______BTU.
any suggestions,originality has fallen out of the picture,funcitio is parimont,but that Dewitts sure looks great,does it have enough BTU ability :??
Francis Yougie said "when you come to a fork in the road TAKE IT "

The Dewitt's restoration aluminum radiator for a C2 has a heat rejection rating of 4600 BTUs
The Dewitt's Direct fit aluminum radiator has a heat rejection rating of 4100 BTUs

A brass/copper generic replacement radiator has a heat rejection rating of about 2700 BTUs

A Dewitt's is THE only one to buy and use. The higher the heat rejection BTU rating the better.

DonO

[Ed S.]

Re: overheating the c 2 crate

Francis,
As I read your initial comment at the beginning of this thread I understand that your new crate engine was operating at normal temps for some time then began to overheat. Having read all the comments, recommendations above I'll take the liberty to offer my 2 cents. Might there be a small head gasket leak that is allowing hot compression gasses into the cooling system. Is there any - any evidence of fluid loss - a reduction in the volume of coolant in the system after the engine completely cools down or... are you seeing any white smoke (actually water vapor) out of the exhaust? If the answer to either or both of these is yes, then you might have a bad head gasket. I can tell you from experience it doesn't have to be a catastrophic failure - a small "leak" is enough to boil coolant fast.

[Jim T.]

Re: overheating the c 2 crate

Francis is your clutch fan operating really good? Some clutch fans are better at moving air through the radiator for cooling.

[Francis F.]

Re: overheating the c 2 crate

Jim, I believe it is workink properly,bought it last summer.
Francis.

[Francis F.]

Re: overheating the c 2 crate

Duke,vac is full time,initial timing is 10*,w/vac connected timing goes to 27*. @ 850 rpm idle neutral,and 18" of vacuum
is this good info?
Francis note:withengine in neut.and car heater on high my temp gauge operates at 200* rises to about 230*,then rolls back to the 200*

seems to operate like that on a regular basis..any thoughts?

[Joe R.]

Re: overheating the c 2 crate

Francis, refer back to the 6th suggestion and end your problems!

JR

[Francis F.]

Re: overheating the c 2 crate

Joe,..got it thanks.
Francis

[Duke W.]

Re: overheating the c 2 crate

Duke,vac is full time,initial timing is 10*,w/vac connected timing goes to 27*. @ 850 rpm idle neutral,and 18" of vacuum
is this good info?

That sounds okay. It doesn't appear that lack of total idle advance is the problem, so it's back to radiator heat transfer capacity and fan function.

The water pump is also suspect... possibly an incorrect or corroded impeller that does not circulate coolant fast enough.

Duke

[Kenneth B.]

Re: overheating the c 2 crate

Are you using a 180 degree fan clutch fan? A lot of the new ones are set at 200 degree which is too high. That was the problem with my 67 BB.