Clean the crankcase ventilation oil drain tube and crankcase ventilation filter housing support bracket with hot soapy water.
Dry with compressed air.
Inspect the crankcase ventilation filter support bracket for cracks and corrosion. Replace the support bracket if any
damage is found.
Inspect the crankcase ventilation oil drain tube check valve for correct operation.
The check valve should:
โข Allow oil to drain from the crankcase ventilation filter housing to the oil pan
โข Prevent crankcase gases from traveling up to the crankcase ventilation filter housing.
A small amount of air can be blown through the line (less than 34 kPa [5 psi]) to test the check valve operation. If
the check valve does not hold pressure, replace the crankcase ventilation oil drain tube .
Clean the exterior surface of the crankcase ventilation filter housing with hot soapy water.
Dry with compressed air.
Inspect the crankcase ventilation filter housing for cracks.
Replace the whole assembly if any damage is found.
