Question about 1999 Pontiac Grand Am GT
Odds are that the thermostat is stuck in the closed position. Replace it with a new one with a new gasket. Its easy to do and will cost around 10 bucks. Also watch the exhaust to see if it is making a lot of steam and dripping greenish water. If it is then you have a more serious problem like a blown head gasket or cracked head. Don't continue to drive with a overheating engine because it can cause the head to crack or warp.
Posted on Feb 16, 2014
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Posted on Jan 02, 2017
Check the catalytic converter. If it is clogged, it will reduce your your power and increase the temp of the car, especially on steep inclines.
Posted on Aug 31, 2008
SOURCE: overheating 2001 pontiac aztek
remove coolant.remove thermostat remove bottom radiator hose to water pump.put a empty container under the radiator.take a water hose put it where thermostat goes flush out the rust in block.watch the water as it come out the water pump .if stream water is small keep flushing until you get a study sream of clear water. also flush out radiator. lower water pressure dont flush radiator it with high water pressure you could burst it. make clean the over flow jug .make sure it not stopped up.put in a new thermostat and radiator pressure cap. fill radiator with half antifreeze and half water.bleed the coolant system.
Posted on Apr 20, 2009
SOURCE: Overheating, no coolant loss
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.
Posted on May 14, 2009
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