Question about 1997 Oldsmobile Eighty Eight
There are many possibilities for car overheating. But as per what you have mentioned in your question ,You have ruled out most of the possibilities by replacing the possible parts for overheating. But one thing is very common that coolant is leaking.And this is the reason of car overheating.If coolant is leaking then you replace all parts the car will overheat till the coolant leak is not stopped. It must be leaking from under the valve cover.''the timing cover is leaking coolant''--engines water pump is behind the cover and it is failing.Other possible location from where coolant can leak are, timing gasket $40, valve cover gasket $140, oil pan gasket set $70, and coolant flush pan. It has to be checked at every location and the leak has to be stopped.Also you can get the coolant pressure test done.With that the exact position of the leak will be identified.At local car auto stores they conduct coolant pressure test.Its not too costly.
Other possibilities for overheating are :--
Overheating can also be caused by an overly-lean fuel to air mixture, or overly advanced ignition timing. Check these or have them checked. This should be part of any major tune-up.
Your water pump may have gone south, as well, which would mean coolant isn't circulating through the engine. And not to sound patronizing (I don't know the reader's level of automotive knowledge) but just to be thorough, if the water pump is belt driven, the belt might be loose, broken or missing.
Lastly, and worst, one or both of the heads or the block might be cracked, or the head gaskets might be blown.
Any overheating will lead to loss in power, as the engine is just not designed to run at such temperatures. The last and worst case, though, will cause severe and increasing power loss.
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Posted on Jul 06, 2010
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Posted on Jan 02, 2017
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