K75 CamChain

[37071]

I have an 87 K75 with only about 100k miles on it (odometer died about 10k ago). It runs great but a new noise is getting gradually louder. I checked the tappets last winter and the gap was in spec. The tappet gap hasn't changed in about 75k. The noise is loudest when the engine is cold, but doesn't go away completely. What is your experience with the cam chain and its tensioner and the guide rails ?

 

[BUDDINGGEEZER]

The cam chain tensioner is controlled by a spring and oil pressure. It might be partially clogged, hense the louder noise with cold thick oil.

Ralph Sims

 

[randykling]

k75 noise

[ive heard that the chain guides,tensioner needs replacments,as mine has the same sounds but not the tappets randy

 

[35634]

not to hi jack the thread, but i bet the odometer problem is the plastic gears MotoMeter used. They magically turn to applesauce or something given enough time
http://forums.bmwmoa.org/showthread.php?t=5036