[Azines]

My friend/indy shop owner told me that based on his previous n55 335i experience, it's necessary to replace the timing chain tensioner at around 60-70k because it most likely might become loose and might be the cause of skipping timing,

I tried searching but had no luck on this particular issue, what are your opinions?

[xxMike61]

Any signs of having a loose chain? I hear this light rattling sound at low rpms but no codes and oil was clean of any rod bearing material.

[Azines]

Originally Posted by xxMike61

Any signs of having a loose chain? I hear this light rattling sound at low rpms but no codes and oil was clean of any rod bearing material.

No signs of a loose chain or any other issues Mike, this was thought of as a preventive maintenance item to replace, which kind of got me thinking as there isn't much of this issue going around from what I've searched

[weehe126]

Well your friend/indy would be the only one who has heard that. Serpentine belt and tensioner, sure that sounds right for preventative maintenance.

[Pladi]

unheard of.. at least for BMW. Other makes yes. At least BMW doesnt have that issue.

[juld0zer]

First sign of a loose tensioner would be an oil leak on the turbo side of the engine. A pretty big oil leak! I've also not heard of this one before.