Having problems with your Mini Cooper Clubman ?

Pressure building in crankcase & blowing oil out the dipstick pipe and other weak seals. Appears that parts off the breather are missing although the diaphram seems to be complete. Idling and low revs = very rough. Travels well at 100kph except for blowing oil every where.

Posted / edited by AnonymousUser on : 17-01-2022

Answers :

Change the PCV positive crank case ventilation valve.
This may be due to the breather system being restricted. Have the system checked by a specialist as some systems are hard to diagnose.

It could be the engine is worn. If too much combustion pressure gets by the piston rings this will cause pressure to eject engine oil.

If the breather is fine then an engine leak down test is called for. This involves pressurising each cylinder and measuring how much air escapes. This involves using a Leak Down tool...consists of two pressure gauges and an air line and someone who knows how to use one.

A compression test will not tell you how worn your engine is. Compressions of 140 to 160 psi are possible even on a worn motor.

Leak Down readings should be below 12%...ideal would be 2% to 6%.... if higher than 20% it means you don't have an engine in there !
Repair Help & Product Troubleshooting for Mini Cooper Clubman

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