My 91 300D is a bit sluggish, though not horribly so. (Frankly it annoys me that my 92 with 231,000 miles is quicker than my 91 with 99,000 miles!) When I described my situation to GSXR a while back, he thought that an ALDA adjustment is my best bet. From all the reading I've done, I think I'm afraid to touch the set screw (though I admire the courage of those who go this route) and will try shimming instead.

I imagine I would start with a 1.0mm shim and go from there. Ideally, I would like to have a bunch of shims on hand so I could fine tune.

Can anyone tell me how/where to get exactly the shims I need? Rather than just eyeballing various washers, it would be nice if I could find a variety of washers that would be exactly the right size and fit. Perhaps such info is buried in one of the many ALDA threads....forgive me if I missed it.

I was going to use the following thread as my guide for the procedure:

http://www.peachparts.com/shopforum/diesel-discussion/69422-om603-alda-removal-instructions.html

Any other advice would certainly be appreciated....I must admit touching the thing at all makes me nervous!

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14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 154k miles
06 E320 CDI "Rutherford", Black on Tan, 172k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 142k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

There tends to be a stock shim in there. Fish it out and find similar ones at the hardware store. The ones I found were still off by a fraction of a mm but some sanding took care of it.

Oh, and as to diameter there is this:

http://www.w124performance.com/images/OM603_injection/ALDA_shim.jpg

Didn't know if I could walk into a hardware store and simply give those dimensions.

__________________
14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 154k miles
06 E320 CDI "Rutherford", Black on Tan, 172k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 142k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife

What's the thickness of the one that's in there?

__________________
14 E250 Bluetec 4Matic "Sinclair", Palladium Silver on Black, 154k miles
06 E320 CDI "Rutherford", Black on Tan, 172k mi, Stage 1 tune, tuned TCU
91 300D "Otis", Smoke Silver on Tan, 142k mi, wastegate conversion, ALDA delete

19 Honda CR-V EX 61k mi
Fourteen other MB's owned and sold
1961 Very Tolerant Wife