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Old 12-13-2009, 11:49 AM
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wilson009 wilson009 is offline
Officially Welcomed to the 'Fest
Location: Buckeye Country (Cincy)
 
Join Date: Sep 2009
Posts: 440
Mein Auto: 2002 745i 116k
tic tic tic tic

OK heres the reason i decided to go through the trouble of removing the lower timing cover.

After i removed the valve covers i noticed the timing chain was shiny on the top.

This is a sign of the chain hitting the block an grooving it. makes a tic tic sound.

Our chains are guided by sliderails which become brittle over time

Sure enough i found grooves on both sides. one rail was cracked. So i will be replacing these rails. See pics for location of grooves and cracks, couldnt get actual pic of grooves due to cams.

http://www.realoem.com/bmw/showparts...68&hg=11&fg=25
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