My 99 volvo xc is blowing thick white, bluish

white smoke indicates a coolant burning problem. most likely a head gasket and when it gets warmed up the expansion of the mating components seals off most of the leak. have a head gasket check done. burning of oil is a bluish colour not white.

Blown head gasket. Pull the spark plugs. The cleanest one is where it is blowing or sucking coolant. Sorry. White is water/coolant. black is gas. bluish is oil.

There are several causes for this, including the above.
Check the spark plugs and coils/wires. Lose or worn parts can cause this. If the spark plugs have thick black residue, you have an oil leak. A flat black powdery residue is too much air. A thick crusty white/yellowish residue would be a coolant leak.
If it is blowing blue or white smoke when running, the you have an oil (blue) coolant (white) leak that needs to be fixed. Normal smoke is grayish in color.
Check all the vacuum lines as a leak may be the problem.

Thats oil caused by "blow by" it means your piston rings are wearing out or you have scratches in the cylinder walls, causing oil to "blow by" the rings and burn during spark. Only way to permanantly fix is to rebuild. You may get temp fix by using a product called restore. It is sold at autoparts stores.

A LOT OF WHITE BLUISH SMOKE ON START UP.VALVE SEALS LEAKING OIL AND OIL RETURN HOLES COULD BE STOPPED UP CAUSING OIL POOLING UNDER THE VALVE COVER OIL LEAKING DOWN BY VALVE SPRINGS AND VALVE SEALS CAUSING ENGINE TO SMOKE A LOT.CHECK A SPARK PLUG SEE IF ITS OIL SOAKED.

If its bluish smoke coming out of the exhaust, then engine oil is leaking past the piston's oil rings. You'll need an engine rebuild, or give its last rites before sending to the salvage yard. If it's white, it should clear up as the engine warms up. White smoke is caused by lack of heat temperature in the combustion chamber. If the engine is warm, and its still smoking (black smoke), then too much fuel is entering one (or more) of the cylinders, which is often caused by a faulty fuel injector. To diagnose which injector is faulty, remove and inspect each spark plug. Any Haynes or Chilton manual has a spark plug section showing what a normal spark plug should look like, versus one caused by faulty injectors.

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Replace the head gasket.

black smoke is fuel white smoke is oil. change your spark plugs to a hotter plug and run with some hpr 50 engine oil or somrthing nice and thick

Is there a question here ?
Are you refering to smoke coming out of the exaust ? Engine compartment ?

Please clairafy..

Thank you..