> Wrong oil filter fitted? Fit one with a non-return valve, so the hydraulic > lifters stay full of oil when you switch off. Unfortunately, I do have an oil filter with a one-way valve, and I use Valvoline Syntech. I was hoping this was the case also, but I didn't get off that easy... Found out the hard way there is piston-valve interferance. -Mike 87 5000CS TQ