SOURCE: White smoke coming out of exhaust even when engine is warmed up.
on the 3.8 ussaualy not the head gasket but the upper intake gasket . antifreeze leaks inside intake and into the cylinder. very common. the new gaskets are much thicker.or the plastic plenum the black plastic part on top of the engine goes bad around the water inlet and need to be replaced . when i do either job itell the person to replace both at same time saves money and headaches in the near future. hopes this helps .....and cost for a shop to do this $1100 to $1500
SOURCE: 96 Deville Overheating....TroubleShooting
did you run a compression check? if so and its good then you have a blockage in the water jacket
if not then you have a head gasket leaking
SOURCE: 2000 cadillac deville check coolant message comes on but coolant
the sensor in the anti freeze bottle some times it sticks some times a light tap will loosen it up but some times you need to replace it
SOURCE: car is hard to start, keeps stalling, white smoke coming out of tail pipe
It sounds to me like you have a head gasket leaking. See if you can get a gauge and check each cylinder. Are you using alot of anti freeze?
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