Alternator Mounts - Part #-less ???

[Black2002]

Here's the reality..

Each of my alternator mounts look like this.  Melted.....maybe some cleaner I shouldn't have used????!!!!!!!

BMW has no part numbers for the mounting. 

Nothing in the white parts books and the electronic versions.

So, I Google search Bosch parts catalog pdf etc.

I find the short 25mm bushing and rubber (Pelican Parts)

I'm not finding the longer bushing and rubber.

Haven't called BNR and don't want to rebuild just for mounts.

 

What strikes me I can't find parts diagrams or numbers ....Seems like there should be a Bosch parts catalog...I find nothing.

Any HELP out there?????

Patts Diagram, Part Number and supplier.

 

Thanks in Advance.

 

 

[Simeon]

I think a few suppliers provide urethane replacements that are considered a worthwhile upgrade. 

 

Try Blunt. He will have what you need. 

[halboyles]

Try this for part numbers and pics:  https://www.wallothnesch.com/en/zuendung-motorelektrik/bmw-1502-2002-turbo/katalogbild-12-13.html

[Roundeie]

RealOem has this

 

 

Ireland Engineering has these

http://www.iemotorsport.com/bmw/item/02altbushings.html

 

Sent from my iPhone using Tapatalk Pro

 

[02Pilot]

Urethane is the way to go here. The rubber has no real advantages and several disadvantages (one of which you have discovered).

[Einspritz]

As an early adopter of the urethane on all my 4 cylinder BMWs  I took them all out.

 

I found them to disintegrate into a myriad of little pieces over time. Perhaps it was because it was the first generation and not of the quality of today.

 

The problem is vibration and the urethane does not allow as much as a "rubber" mount, though the alternator has less tendency to "angle" if you tighten the belt too tight.

 

Some have advocated the white bosch pieces, but I have found that the 90 shore from BMW are best. BMW offers a 75 shore for the S14 but those are too soft.

 

Another bane of my existence is using a bolt as a pivot. There is just too little tolerance creating too much slop. I now use a ground shoulder screw from McMaster which takes up a bit of that slop. If you are really detail oriented, you can make new center pieces which allow for only 0.001" tolerance, which is enough to just be able to grease the pivot.

[dlacey]

The M10 seems to suffer from serious vibration at certain revs... I have changed to a hard mounted ex-Volvo alternator and the vibration regularly shears the mounting bolt.

So, advise to find the proper mounting rubbers...seems Bosch/BMW knew what they were doing when they specced it this way.

[02Pilot]

I'm only a single data point here I know, but I've had the same urethane bushings in my alternator for well over a decade at this point and they're fine. This on a 300 Motorsport cammed, dual Webered motor that regularly sees its redline. I'm not sure what's different about my setup, but clearly something is. How much tension are you guys putting on your belts?

[Black2002]

Eureka! Roundel you nailed it. Thanks!! I gotta wonder the origin of that illustration .......perhaps early 320?  

I agree with going urethane. 

Full disclosure, Sunday with unused rubber sway bar bushings, 50 grit grinder and drill press I "turned" the bushings till they fit with lube and cut the spacers to use as internal sleeves. New for both mounts. Installed. Alternator hangs tightly with the M10.

Fabrication in a pinch, but urethane  will be ordered.

Thanks All.

[Conserv]

I’m confused, once again. ? Are you guys having to replace the factory rubber alternator bushings every 5,000 miles, 10,000 miles, 25,000 miles?  Are you overtightening your alternator belts? Showing me a totally shot bushing, freshly removed from a 45-year-old car, doesn’t tell me much about the viability or lifespan of the original bushings. How old is that bushing? How many miles has that bushing seen?

 

When we overhauled my ‘76’s engine in 2011-12, the alternator bushings were shot, not nearly as badly as Black2002’s bushing, but undoubtedly in need of replacement. But they were my ‘76’s original bushings, 35 years old and with 100,000 miles on them. In my book, bushings that go 35 years and 100,000 miles between replacements are....damned good bushings!

 

So...how often are you changing these bushings?

 

Regards,

 

Steve

 

Edited September 18, 2018 by Conserv

[Mike Self]

On 9/18/2018 at 6:38 AM, Andrej said:

I'm only a single data point here I know, but I've had the same urethane bushings in my alternator for well over a decade at this point and they're fine.

+1 and two data points--the urethane bushings on both my 02s have been on since the early 80s (or maybe even the late 70s--so long ago I've forgotten); they don't disintegrate or turn to black goo (average life of the rubber ones was about 3 years).  And both alternators are original, so haven't had any problems there either...

 

IMHO

mike