In Reply to: Timing chain posted by Chris Flener on December 18, 1999 at 18:24:40:
: I have an '89 M3 with 150,000 miles. I'm assuming the timing chain was replaced. How can I tell? What kind of wear should I look for?
Why would you assume the timing chain has been replaced? They are not a standard replacement part as is a timing belt. If you are getting any instances of timing chain noise on startup (you'll know when) then it might be time. My car has 131k and I've been getting a little timing chain noise one in about every fifty starts. I think when the cars probably get around this mileage it might be best to replace the timing chain, guide plates, tensioner, and oil pump chain just as a precaution. The chain probably has stretched some over the years.