Club 80-90 Forums

Hi all,

I've been having issues with my alternator and believe the bearings are shot. It makes a screeching noise when idling or sometimes at higher revs and I don't believe it's the belt (I've tightened it, loosened it and all sorts!).

I can't find what bearings to order and was wondering if anyone could help, or point me in the right direction please? Have looked on justbearings, but no idea what size i need.

It's from a 1.7d, Bosch 068 903 031 D

I'd rather try fix it even though you can get new ones on ebay for under £50.

Thanks, J

Not the water pump then?

If you have taken the bearings out and go to your local bearing factors they will be able to sort you, or measure them and then get a quote online from a supplier.Digital measuring calipers are cheap enough.
They could well be part nos. BEARING - S.R.E 1 120 905 102 & BEARING - D.E 1 120 905 533 but that exact alternator no. doesn't appear in the Bosch parts catalogue that I have. The closest is 068 903 029 N / ( 0 120 469 734 ) / ( BX469734 ).

I have just replaced the bearings in my alternator, when you take the bearings out you can measure them easily, mine still had the code numbers on. When ordering Specify 'C-3' clearance

Cool, thanks all.

I've eliminated the water pump as it's fine when I take the alternator pulley off. Will take bearings off and measure,


Thanks again, Jamie

Hi,

Did my bearings recently but cant remember sizes, but whilst its apart check the carbon brushes and slip-rings. My slip rings were very grooved and almost worn through so replaced as they can only be done after splitting the alternator and removing the bearing. Cheap part but a bit fiddly to do.

My bearings were very tight and required both heat and a puller to remove

Cheers.. Phil