Thread: Pulley bearing?

Will do. Always helpful when others do this and i'm searching for info years down the line

Picking up pulley and tools this morning

Well, that seems to have fixed it.

The issue, as far as I can tell, is caused by the tensioner 'bounce' at idle, which is normal from what others have said, but causes the upstream pulley (the alternator one) cyclic under-rotation, i.e. repeated on/off engagement of the over-run mechanism, and which goes away when engine revved. Noise might appear to be caused by tensioner bouncing but is actually a fault in the alt. pulley overrun mechanism - mine was clicky in reverse.

Might've lasted a fair bit longer... but why risk it.

No pics (I was in too much of a rage trying to get the alternator back on anyway ), but some tips for other novices like myself:

- you dont have to take the alternator off to remove the pulley (I wish I'd left mine on)
- you need the tool - M10 inner spline and 33T outer spline for Bosch alt. on my Puma.
- You hold the inner spline steady (its the alt. spindle), and undo the outer one... not the other way around, as I only found out from this video: 7052 | Alternator Pulley Tool Kit - YouTube
- its a regular right-handed thread; the one in the video above is reverse-threaded

I replaced the tensioner (un-necessary) and one of the idler pulleys (which i accidentally damaged) discovering the problem... a treat for the Defender.

Hope this helps,

Sam