[DieselAndRust]

In Passat or jetta TDI chirping in cold weather and cold start- how to solve,
you list Protective Cap #028 145 291 A (optional) which I purchased.

It appears to be the cap for the alternator pulley and is way too big to go on the serp tensioner pulley. I see that some replacement tensioner pulleys come with a cap, but mine didn't. What could be going on here? (Anybody want an alternator pulley cap?)

 

[Fluid]

Try classifieds.

 

[chittychittybangbang]

I'll check the part number. Posts moved.

 

[chittychittybangbang]

This shows "PROTECTIVE CAP FOR SERP BELT ROLLER"

http://www.worldimpex.com/parts/genuine-part-protective-cap-for-serp-belt-roller_41052.html

Not sure exactly what that is but it's possible that it's for the alternator since it's run off the serp belt. In addition, the serp belt tensioner pulley has no cap.