- We are installing a new crankcase pressure relief valve, not the one on the motor, the little plastic piece that's against the firewall. Where's this plastic pressure relief valve you're talking about? I didn't know that even exsisted. The one on the motor; you mean the AOS?
- What would cause an excessive amount of crankcase pressure? Under load at high RPMs it sprays oil out of the dipstick tube, pushing the dipstick out an inch or so to relieve the pressure. This of course causes oil to spray outward onto the fenderwell and firewall.
I also had a PCV fault code and I understand that this combined with the excessive vacuum are signs of a faulty PCV system. The fault code has gone but I still experience the high vacuum pressure in the crankcase.Jun 20, 2007 · I seem to be having a problem with excessive crankcase pressure coming from my engine. I can hear the oil pan either implode a small amount or get pushed out because when i turn the car off and about 5secs afterward you hear it, plus it will puke a small amount of oil out of the pass side breather filter. Narcissistic abuse quotesI also had a PCV fault code and I understand that this combined with the excessive vacuum are signs of a faulty PCV system. The fault code has gone but I still experience the high vacuum pressure in the crankcase..
- I've just had the head pressure tested - all ok. Head has been skimmed and new gaskets n bolts fitted. Thinking the lot will have to come off again and fit a set if new rings to each piston. Unless anybody can steer me in another direction (apart from the brick wall that I always seem to be headed)... Cheers. 2006 110 CSW Td5 2004 D3 HSE