Any idea where the pressure regulator valve is ? I'm guessing sump near oil pump and a bypass valve in filter housing ? .. I ask as I think I'm geting valve jack when cold so I've flushed oil and changed to vag spec 5 30w vut if this doesn't fix the prob Il have to strip and clean it the hard way .

Jim

I believe I've sorted the fault . Il keep an update on how we get on . Going to run it now and flush again after its got some miles under its belt . Need to clean engine down and check over for leeks now its on better oil

Jim

Got my fingers crossed.