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non vette question

 
Old 01-31-2010, 03:25 PM
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jetmech09
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I have a friend that has a 72 Olds 442 . recently rebuilt 455 . all stock with W-30 heads and stock cam. car runs great except it overheats in idle ok while driving. timming is at "0" compression check and blow by check are good. new 4 core radiator. replaced rad cap , no fan clucth . car does not come with a fan shroud but put one in from a 1971 with no help. also removed all air in coolant system . I see no vapor smoke out of the exhaust. please let me here your ideas. thanks
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Old 01-31-2010, 03:34 PM
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Did you check the T-stat?
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Old 01-31-2010, 03:36 PM
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oh yeah :: removed Tstat no help
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Old 01-31-2010, 03:49 PM
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You'd better work a C5 into this or it's gone in a hurry!
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Old 01-31-2010, 03:56 PM
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lol hes a big C -5 fan!!!!!!!:thumb s:
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Old 01-31-2010, 04:59 PM
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Originally Posted by jetmech09 View Post
lol hes a big C -5 fan!!!!!!!:thumb s:
Well, it started out in C5 General!
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Old 01-31-2010, 09:38 PM
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bob guzzy
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Try an electric fan set up, measure the radiator and see if you can find a setup at the junkyard, wire it direct to see if it cools OK, after you get the car to cool then you can address the on off with a bi metal switch like they use for the c-4's.

The switch screws into the water jacket on a head or the water section of the intake manifold, when the coolant reaches the correct temp it starts the fans by createing a ground.

old style mechanical fans are so last century, elect is the way to go with any cooloing problem.
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Old 02-01-2010, 08:49 AM
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Originally Posted by jetmech09 View Post
oh yeah :: removed Tstat no help
I would suggest putting the proper T-Stat back in, the coolant may not be spending enough time in the radiator to effectively cool off, once the coolant in the whole system becomes too hot (especially at idle since fan speed and air passing over the radiator and engine area is very low) the car will overheat.

If that doesnt work I would suggest getting the best mechanical fan you can find (something with large blades that moves alot of air), make sure its fitted into the shroud and then I would suggest a good fan on the front of the radiator to push air through it...... ran this setup on my supercharged small block second generation Camaro Z-28 after battling with the overheating issues myself.... I was also running a new 4 core radiator.

Good luck on getting it worked out
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Old 02-01-2010, 09:26 PM
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thanks for the suggestions I will try getting a new fan and thermostate.
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Old 02-02-2010, 11:42 AM
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Are you saying that the initial timing is at Zero?
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Old 02-15-2010, 04:41 AM
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yes initial timming is "0"
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Old 02-25-2010, 08:05 PM
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You need to kick that up a little the engine is fighting itself, slightly loosen the dist. and just bump it about a 1/4" if you do it with the engine running you will hear the engine speed up, then drop the idel down to where it was and try it.

None of those crank marks were right
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