One question. Might be dumb but just want to know before I do anything. Are the stock 8 gauge looking cables all positive and the smaller one positive?

Yep. Grounding is done through the housing/physical mounts to the engine.

__________________
Cruise Control not working? Send me PM or email (jamesdean59@gmail.com). I might be able to help out.
Check here for compatibility, diagnostics, and availability!

(4/11/2020: Hi Everyone! I am still taking orders and replying to emails/PMs/etc, I appreciate your patience in these crazy times. Stay safe and healthy!)


82 300SD 145k
89 420SEL 210k
89 560SEL 118k
90 300SE 262k RIP 5/25/2010
90 560SEL 154k
91 300D 2.5 Turbo. 241k
93 190E 3.0 235k
93 300E 195k

I'm about to do this swap on my 190D 2.0, I got the al0162x 143 amp, hope it fits..

For the wiring, I got 2x 16mm2 (6gauge?) cable from B+ on the alternator to the stock distribution block, and then to the battery. Does this seem right, and is there anything else I need to upgrade?

update:
I replaced the battery terminal with a better one, it's the first time I do something like this so I want to make sure it's right.


Some pictures.. maybe I should replace the stock distribution block

http://i.imgur.com/7zjZlZN.jpg
http://i.imgur.com/ljnIjBj.jpg

Do these recommended models have a 25mm or 35mm shaft length? If upgrading to an ORP, does it matter?

Looking at doing some level of this upgrade on my 350sd.

__________________
Current Diesels:
1981 240D (73K)
1982 300CD (169k)
1985 190D (169k)
1991 350SD (116k)
1991 350SD (206k)
1991 300D (228k)
2008 ML320 CDI (199k)
1996 Dodge Ram CTD (442k)
1996 Dodge Ram CTD (267k)

Past Diesels:
1983 300D (228K), 1985 300D (233K), 1993 300D 2.5T (338k), 1993 300SD (291k)

The 143A and 150A units being discussed for serpentine-belt pulleys have a shaft protrusion of approximately 20mm from the face of the pulley seat.

For your 1991 350SD with OM603 engine, just swap the pulley over from the old alternator.

__________________
Check out my website photos, documents, and movies!

I did this for my E320 when it hit 100K and it's been fine for several years. One of these days I'll get around to upgrading the wiring, but so far so good and other issues have popped up. Had to drive four hours at 10 mph on one occasion, unexpected snowstorm, and it handled the full electrical load (including rear window heater) without issues. Highly recommended, and another hat tip to gsxr.