I need an opinoin. I recently blew a head gasket on my 2002 Pontiac Grand Prix with 140,000 miles on it. Right until I then the car was giving me excellent peformance. I'm not sure if my lower block needs a re-build, but I think now might be a smart time to do it.
My question is:
Since I have to pull off the heads to fix my car anyway, is it a WISE thing to pull the rest of the engine out and re-build it, or a waste of money? It cost $1200 to do a complete rebuild, and about $600 just to fix the heads. This difference in cost means a lot, but I plan to keep this car.
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Re: Rebuild All or just Fix Heads
It is best to rebuild the whole thing, just the heads will put more pressure on the bottom end ,with that many miles and start leaks and could lead to bearings going out, it did happen to me in the past and a hard way to learn
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Replace your coolant temperature switch,it's screwed into block by oil filter.Here's a picture of what it look's like.Your water pump working properly.Are your spark plugs burning clean,not oily from bad piston rings?
Sorry to inform you of the bad news but the white smoke is engine coolant burning off and the rough running condition is also associated with coolant leaking into the combustion chambers.This will be a head gasket repair, basically a head job where you will need to machine the heads down and install new gaskets from the heads up.Get back to me if you have any more questions, thanks and I hope I could help!!!
I have a 1996 Pontiac Firebird with the 3.8 L V6, and have had problems until I replaced the DexCool (it's never ran so good!) However relating to your problem, there was a class action lawsuit regaurding the 1996 GMC/BUICK/PONTIAC 3.1 L engine, due to DexCool destroying the engine/heads/etc. Follow the link - I do not know all of the details, but it may be worth checking out. 1996 was the first year that DexCool was used at GM.
Hope it helps. http://www.dexcoolsettlement.com/