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Valve Retainers: any opinions? (archive)

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Posted by jslick on February 12, 2000 at 16:35:46:

Can anyone validate this claim, about valve retainers?

www.racepad.com says this, regarding 1995 M3:

"Early production (pre 10/95) versions used softer valve retainers. These should be checked around 50K miles. BMW underestimated the wear on these and the softer metal is prone to wear. A worn valve retainer will result in catastrophic engine failure. The valve will drop through into the cylinder and whack the piston to bits and bend the valve stems."



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