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wsimhiser
Novice
Aug 18, 2014, 9:24 AM
Post #1 of 5
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Engine over heating
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I have a 2001 Cadillac Devil 4.6, I put an engine in it and it was over heating. So I replaced the water pump and thermostat. The car runs great but still over heats. When the temp gauge is at mid point I removed the drain plug from radiator and the coolant wasn't hot but the coolant at the reservoir was. Can some one please give me some help with what may be wrong. I thought maybe an air pocket but don't know.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 18, 2014, 10:14 AM
Post #2 of 5
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Re: Engine over heating
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What killed the first engine? Is this a used engine now? It may have serious problems and was sold anyway so more testing and know it's really full of coolant first then I think I'd begin testing for a head gasket type issue on this especially if used the engine could have been the reason it was available!
T
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wsimhiser
Novice
Aug 18, 2014, 11:48 AM
Post #3 of 5
(1448 views)
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Re: Engine over heating
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Thanks. It is full of coolant. It just acts like it has an air pocket. It isn't fogging and it isn't putting coolant into the oil.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Aug 18, 2014, 12:02 PM
Post #4 of 5
(1442 views)
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Re: Engine over heating
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You need to answer some of the questions sport. What happened to the old engine and why did this one overheat right out of the gate?
Head gaskets don't need to fog out tail pipe or mix with oil but can put exhaust gasses into cooling system and you'll overheat all the time with a never ending air (vapor) problem that can't cool an engine.
If air pocket just normal and a pest to get out vacuum fill system and know it's full.
Just do testing and things on this one while it's intact. Pressure test, test for fumes in coolant which is iffy, fans working and blowing the right way, all of everything you can do to nail it down.
If used (must be) it was probably already like that if head gasket and another gave up on it. You have to say how and where you got the engine and what tests were done to save that one at all if known. Good salvage yards should have info all over the thing including miles and a compression test as they don't want it back either but most would give you another but nothing for labor if bad. Used is used and there are risks,
T
(edit) Just to add if head gasket just gaskets and bolts + misc like another oil change and more over $500 in parts and think this one is tons of listed hours never mind if head check out OK or NG and that too on top. Check first as said)
(This post was edited by Tom Greenleaf on Aug 18, 2014, 12:31 PM)
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