Positive Crankcase Ventilation: Service and Repair

POSITIVE CRANKCASE VENTILATION SYSTEM

Important Servicing

Fig. 87 POSITIVE CRANKCASE VENTILATION SYSTEM:

Oil Trap And Flame Guard System:

Check hoses, nipple and flame guard for condition and clogging. This can be performed by visual inspection of each individual component.

Fig. 105 BLOCKED P.C.V. SYSTEM (NON TURBO ONLY):

A blocked flame trap will cause the crankcase ventilation system to malfunction and result in high crankcase pressure.

Symptoms Are:
-Oil dipstick "jumps out" of the pipe.
-Oil leakage at the seals in the cylinder block.
-Seals must not always be replaced if they are leaking due to a blocked flame trap.
-Fix the flame trap, clean the engine and check if seals are still leaking.
-The engine knocking (change to a new flame trap if necessary.

Reasons for a blocked flame trap may be:
-Too long intervals between engine oil changes
-The engine oil used is of poor quality