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Old 07-20-2021, 04:16 PM
Russianblue Russianblue is offline
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Join Date: Jul 2010
Location: Charlotte, NC
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it's absolutely happening on quick decel. it does NOT ever happen on Accel or of there is any load on the motor. sometimes you can BARELY hear something when idling after first startup but it soon goes away. it also happens when i turn the car off.

pulling the serp belt would be a good test for sure. that one is pretty easy.

i did NOT install a new tensioner. i used the kit tool to pre-load the timing old chain tensioner. if the spring in the tensioner is just weak, then that might explain why i'm hearing it at idle, first start and decel....when oil pressure is lowest.

heck, maybe i just try a new tensioner. that's a super easy install on the Xer with my big 32mm water pump wrench.
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2005 X5 3.0i - 71k mi (9.2018) -> 81k (9.19) -> 100k 9.21
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