rebuilt 350, burning oil just like the engine I replaced? - Page 2 - Hot Rod Forum : Hotrodders Bulletin Board
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Old 07-16-2012, 04:36 PM
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Originally Posted by JesseShredd View Post
Amy suggestions on what to do about the engine running hot would be appreciated. I let all the air out of the system yesterday, which didn't make a difference.
You need more radiator.

What thermostat are you using.

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Old 07-16-2012, 04:42 PM
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180 degree thermostat. Radiator looks identical to my 89 305 camaro
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Old 07-16-2012, 05:01 PM
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you definately need a v8 rad. also. if you don't have info on the rebuild, check to see if there is a rebuild tag or work order number stamped somewhere on the block. ask around who might have that kind of stamp. you may be able to get some info from the builder. when you take the manifold off to replace the gaskets, check to see if the intake fits the heads. sometimes the head gasket surfaces get machined and that makes the mating angles to the intake manifold wrong. it can leak oil or air. both could cause the problem you are having. a lean running engine will run hot, also oil sucked into the manifold plenums will cause smoke. it happened to a friend of mine who had an olds engine. the shop had to plane the heads a bunch and put them on anyway. mostly because they couldn't find another set to fit. it ran hot and smoked, aspecially when hot because the oil got thinner maybe.
just a thought.
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Old 07-16-2012, 05:31 PM
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Thanks for your word, I will make sure everything aligns up while installing the edelbrock intake gaskets. Looks like I'll be purchasing a new radiator! Found a 4th gen camaro
dual fan also...anyone heard of making them fit a thirdgen?
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Old 07-16-2012, 07:03 PM
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make sure to check the intake without a gasket so you know for sure about any spaces etc. also, make sure the gasket is installed right becaus those rear ports are sometimes covered so the coolant flow goes the right way without short cutting.
other things to check
-pcv valve and baffled cavity in valve cover under the pcv to make sure it isn't sucking oil in that way. some aftermarket covers don't have much for baffles under there.
-auto trans vacuum hose (if equipped) to modulator valve. if modulator valve is leaking the engine can suck up trans oil.
-document how much oil is being used. check it the same way every time-like if it is hot and just shut off or, if it is hot and has sat for several minutes so the oil has had a chance to find it's way back to the oil pan- making the level higher than if checked right after shut down.
-make sure it is engine oil and not trans fluid or coolant.
-pressure test the cooling system to make sure you are good to go there. did you flush the rad etc before assembly was finished? is the core clean on the inside?
-are all the plugs burning the same as far as what colour they are when you take them out? a dark plug can tell you that cyl is getting oiled or fueled more than the rest. make sure to have the proper reach on the plug and correct heat range. too long of a reach can cause hot running, as can too hot of a heat range.
keep us posted.
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Old 07-17-2012, 03:57 PM
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Getting an aluminum v8 radiator, should I go 2 core or 3?
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Old 07-17-2012, 04:10 PM
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go with the 3 core rad. you know what they say, go big or go home. also have a new thermostat installed at the same time, and not one of those knock offs, a real gm thermostat. I have had lots of trouble with the cheap thermostats and then finally put in a gm one and problem is solved.
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Old 07-17-2012, 04:16 PM
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Wouldn't be a chance of it running too low of a temapture? and kinda skeptical about the price difference. Don't wanna pay more for the more I don't need Haha.
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