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Have recently purchased 1992 M 5 with full service history and 150,000k on the clock.
Very loud o/h noise but all valve clearances come up ok. I can see some play in the cam buckets and am considering over boring the cam carrier but not sure if oversize cam buckets are available or even if the carrier can be machined.
Am I looking in the right direction or should something else be tried first. Do the cam buckets wear and if so could I try new buckets first. Thanks if you guys have any suggestions.
 

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I'd recommend registering and re-asking this question at the M5board.com E34 section - much more active with E34 M5 folks, some of whom have hands on experience rebuilding the S38.
 
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