cam and crank cover bolt rubbers? - K-Bikes.com - Excellence in Motion
 
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post #1 of 3 (permalink) Old Sep 10th, 2010, 9:34 am Thread Starter
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Join Date: Nov 2009
Location: Lisbon, (previously Colorado), Portugal
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cam and crank cover bolt rubbers?

so I know I should check my valve clearances soon, but the rubber that is around the bolts on the covers is old and cracking. Is it a critical part of the seal, and should I try to find replacements for them? are they specially molded, or simply a viton O-ring?

just trying to prepare before I tear anything apart ;-)

===================
/1957 BSA A10 Spitfire Scrambler
/1960 BSA A10 Super Rocket (basket)
/1981 Suzi GS650
/1988 BMW K100LT (in Lisbon)
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post #2 of 3 (permalink) Old Sep 10th, 2010, 6:23 pm
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They are part of the seal, and not a generic 0-ring. The bolts holding the covers on are shouldered, and pressure from the grommets is what holds the covers tight to the block. Good idea to replace them every 20 years or so.

1987 RED K75S
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post #3 of 3 (permalink) Old Sep 11th, 2010, 5:15 am Thread Starter
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cool, maybe I'll take it to a shop I found that used to maintain the Portuguese Police K's, they still have stocks, but are no longer an official BMW dealer.

Thanks!

===================
/1957 BSA A10 Spitfire Scrambler
/1960 BSA A10 Super Rocket (basket)
/1981 Suzi GS650
/1988 BMW K100LT (in Lisbon)
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