325i M20 alternator

[digger]

Does anyone know a good source for an alternator?

Bosch have a 90A p/n AL49X as a re manufactured unit but based on the pictures it appears that some OE one are isolated with rubber bushes and this isnt? can anyone confirm?

[Kershaw]

I have noticed that some have bushings and some don't. I don't know which models came with which, it seemed random to me.

[digger]

It seems that it may be the 80A or ones from e30 m3 with bushings.

[E30SPDFRK]

M10, S14, and M20 up to 11/85 have rubber mounted 80A alternators. The solid mounted one is 90/95A and a direct bolt on replacement.

[digger]

thanks, i started to come to that conclusion myself after enough googling of part numbers.

[zaq123]

Does anyone know a good source for an alternator?

Bosch have a 90A p/n AL49X as a re manufactured unit but based on the pictures it appears that some OE one are isolated with rubber bushes and this isnt? can anyone confirm?

don't get one with bushings....it's a common mod to install solid alum. bushings to replace stock as they fail. No bushing...no failures....BMW finally figured it out later on...there is no need for them in the alt.

[digger]

yeah the bushed are the 80A variants buylooks of it. bought a AL49x solid connection. was more concerned about the OE being bushed and the el cheapo solid.

[digger]

new pulley has no keyway. anyone elase encountered the issue?

https://www.ecstuning.com/b-genuine-bmw-parts/alternator-pulley-66mm/12311288238/

surely im not upposed to removed the key and run alternator on friction grip?

[zaq123]

new pulley has no keyway. anyone elase encountered the issue?

https://www.ecstuning.com/b-genuine-...m/12311288238/

surely im not upposed to removed the key and run alternator on friction grip?

I remember reading about it. Bosch had a few different pulleys, 2 piece, keyed and non-keyed. The consensus is it will be fine without a key. Install/torque the pulley correctly and belt will slip way before the pulley will.

[digger]

I'll probably just reuse the pulley and if the original in non keyed I'll just replicate that.

[ForcedFirebird]

The bushing and non-bushed alternators are almost identical - save the front cover. If you have a used non-bushed alternator and a new bushed unit, just remove the bolts and swap covers.

Honestly, it's been a bit since I have seen a bushed reman alternator - almost a decade to be less than exact.