White smoke


Asked by Feb 13, 2014 at 10:37 PM about the Cadillac DeVille

Question type: Maintenance & Repair

Got a 1999 Cadillac Deville from a friend. Changed fuel pump , water pump , thermostat , alternator and now it's putting out white smoke from the tail pipe. Does anyone know what this might be? Thanks for any help, I'm about ready to give up !!!

7 Answers


Sounds like a blown head gasket.


Check for coolant lose. Also a pressure test on the cooling system with the spark plugs out will confirm if this is your issue. Some auto parts stores will loan you the test equipment.

1 of 1 people found this helpful.

Thank you

1 of 1 people found this helpful.

Those Northstar engines are notorious for head gasket failure! HTH. -Jim

I have a 2002 DTS Cadillac I just my thermostat put in but my car still overheating then I got a new radiator and the car is still overheating but it's no white smoke coming out the tailpipe. I have no mix oil with water! Still thinking it's not a blown head gasket so can someone answer the question for me what's wrong with it?


Northstar engines fail due to head bolts pulling loose from their threaded holes. There is a fix but it is expensive.

2 of 2 people found this helpful.

Exactly! You're looking at upwards of $3500! Not worth fixing, in my opinion. The vehicle is 16 years old. -Jim

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