12-13-2009, 11:49 AM
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Officially Welcomed to the 'Fest
Location: Buckeye Country (Cincy)
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Join Date: Sep 2009
Posts: 438
Mein Auto: 2002 745i 116k
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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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