<!-- from fixya rte -->How to replace volvo xc90 5t turbo O ring - 2005 Volvo XC90

Burning oil may be the cause of the rest. Bad PCV system? Worn rings? Bad valve guide seals? Fully describe how and when it burns oil.

Does the smoke smell like burnt antifreeze or motor oil?

Still sounds like the turbo. Unless you got it from a reputable place I would go back and get another.

1. Most likely.
2. Unbolt 9/10/11mm.

tHIS WILL TURN ON AND KEEP THE CHECK ENGINE LIGHT ON, MOST OF THE ENGINE BLOCKS ARE THE SAME BUT ARE BUILT A LITTLE STRONGER TO WITHSTAND THE TURBO, IF HE CONNECTS THE TURBO AND YOU DONT BEAT ON THE MOTOR I THINH YOU WILL BE OKAY, HAVE HIM USE ALL THE OLD PARTS LIKE INTAKE INJECTORS OIL PAN EXHAUST MANIFOLD AND I THINK IT WILL BE FINE, HOPE THIS IS HELPFUL,

its a sqare o ring. only use a dealer [vovlo] one, they have been revised to reduce the leaking problem

much less power, much less speed, and much less mpg, now was that realy worth it?

Go to an auto supply store like PEP boys or Advance Auto, etc., and buy a Haynes Repair Manual for the 740. You may be able to consult one at your local library for free. Even if it doesn't cover your model year, the replacement instructions are pretty much the same for all years. in fact even a 240 Volvo manual would be essentially the same. Pay particular attention to the installation instructions....you have to slide the pump on, and then rotate it a few degrees clockwise to make the upper o-ring seal. Good luck!

U will have to play with it and move it back and forth and wiggle it at the same time, other than that I have no easy fix.

if you clean it at the block and put on some sealer it helps,the only way to fix it if your asking this ? would be to pay a VOLVO tech to do it correct or live with it it is very common and is normally not a big leak