I had a similar knocking sound. I replaced the passenger side timing chain tensioner first because it was easy to get to. That helped for a while. Then the sound came back. Then I replaced the solenoid check valves that help keep oil properly flowing to the VANOS system. That helped too. But ultimately I did the full timing chain and chain guide replacement. All the knocking sound went away.


Flatlander

__________________
**************************
2002 BMW X5 4.4i
Metallic Gray
**************************