Has anyone had the oil pump check valve replaced? As I understand it, it's an updated item that can cause some of these symptoms.

My car, when stone cold, clatters for about half a second. I'm going to do the check valve first and see where that gets me.

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"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss

Michael
2014 E63S Estate
2006 SLK55
1995 E500
1986 Porsche 944 turbo