Thread: Timing Chain Guides - time to failure
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Old 05-13-2013, 09:55 PM
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Location: Illinois
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Quote:
Originally Posted by GT3Jeff View Post
I am trying to decide when to replace my timing chain guides - the so called weak link of the E53 X5 4.4i.

Please post the mileage at which you had a failure or when you did you preventative maintenance.

My 2002 is currently at 175,000 km.

Thanks!
Doing mine at 135,000 miles. After taking of the covers, I can see that the rails have not yet disintegrated, but show some chipping. Good time to do the rails now. Also, considering replacing the VANOS seals with the Beisan kit, plus the tensioner and the check valves.
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