Car is smoking need help PLEASE

[Turbo_Shae]

Hello,

I have an '87 Buick Grand National and I need some help fast. My car is emitting white smoke from the rear when its engine is ignited and during driving. The problem just started recently. I have taken the vehicle to two authorized Buick repair shops; both, state the vehicle is fine and cannot diagnosis a problem. Does this sound like an engine or exhaust problem?
The engine was overhauled this year and a new tubo-charger was installed. The car has an aftermarket fuel pump and exhaust system. The car only has 38K original miles. COuld some please offer some advice on the matter.

Thanks

 

[John Larkin]

Watch your coolant level in the radiator and overflow tank. It could just be condensation but with a rebuild, who knows? Make sure the fluid level isn't dropping over time.

 

[GN ERGY]

Maybe turbo seals?
Check your turbo on both sides for any oil.
Tarey D.

 

[.38 special]

white smoke usually means you're burning water/antifreeze. You can keep an eye on it like mentioned before, or remove your radiator cap and look for bubble while someone revs. This will tell you if you have a blown head gasket.

 

[turbofrank]

any head work done? After head porting my car smokes at idle
sometime.