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Crankcase Breather Ejects Oil
The crankcase breather canister includes a pressure
relief valve that prevents a build-up of excessive
pressure in the breather canister.
In normal operation of the engine, the pressure relief
valve remains closed. If there is evidence of oil
staining on the cylinder head behind the breather
canister, perform the following procedure in order to
diagnose the fault.
Probable Causes
• Breather filter
• Breather hoses
• Excessive blow-by
Recommended Actions
Illustration 34 g03758596
Typical breather canister
(1) Breather canister cap
(2) Filter element
(3) Breather canister
Note: The procedures have been listed in order of
probability. Complete the procedures in order.
UENR4469-36 91
Symptom Troubleshooting
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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