I want to thank those individuals who helped me with an oil leak on my 87 325is. It was the pressure relief mechanism on the oil filter housing. An hours worth of work (and a face full of Mobil 1) to replace a $0.35 o-ring. BTW, the tapered, cross drilled, hollow bolt that holds the housing against the block is a work of art. Steve Fox 87 325is 86 R65