Corrective Action/Reconditioning
Corrective actionIf the problem is assumed to be in the crankcase ventilation, this should be carefully examined and, if necessary, remedied before the cylinder head is reconditioned or replaced.
If the problem is in the piston, piston ring or cylinder liner surface, the engine should be reconditioned according to "Reconditioning" or, if necessary, replaced.
Reconditioning
Replace piston rings
Piston-ring replacement applies only to cars with engine numbers below 396323.
The first measure is to replace the two lower piston rings. If the upper piston ring is undamaged, it should not be replaced. If the upper piston ring is replaced, this can result in increased oil consumption.
Important:
Check that the oil control ring is facing up!.
The P/N for piston ring kits with the new piston rings is 272270-0 (dia. 81.0 mm = 3-3/16") and 272271-8 (dia. 83.0 mm = 3-17/64").
Note:
The upper piston ring should be replaced only in exceptional cases.
Installing piston rings:
It is important that the upper and middle rings are installed facing up. The lower ring can be installed either way.