Quote:
Originally Posted by GSTE34
I hear a loud rattle, crank sound. I’ve heard it could be that vanos oil check valve or timing chain guides. Some days it’s louder than others but it’s been going on for 3 days in a row now on cold start. Anyone ever experienced this?
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The cold start clunk (rattle) noise is normal for the S65 engine .
When *NOT DD* during cold start we can hear the loud rattle crank noise (same situation here)
Over the years I saw it fixed , but only once . It was the *Vanos-Gears* and it was a PUMA-case fixed under BMW warranty.
In this thread (with videos of the noise in #15) you can read pretty much everything about the S65 cold start clunk noise =>
https://www.m3post.com/forums/showthread.php?t=996069
Note: Keep in mind the S65 Vanos-Gears are not cheap !
