240 L4-2127cc 21L SOHC B21F (1982) Emission Control Systems - Positive Crankcase Ventilation
Positive Crankcase Ventilation: Testing and Inspection
Fig. 64 FLAME GUARD AND P.C.V. NIPPLE
Check hoses, nipple and flame guard (where applicable) for condition and clogging. This can be performed by visual inspection of each individual
component. Fig. 64.
Fig. 105 BLOCKED P.C.V. SYSTEM (NON TURBO ONLY)
(except turbo)
A blocked flame trap will cause the crankcase ventilation system to malfunction and result in high crankcase pressure. Fig. 105.
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 or not.
- the engine knocking (change to a new flame trap if necessary, see "COMPONENT REPLACEMENT AND REPAIR PROCEDURES")