85 240d 616.192
great info here, but i still am having a hard time finding the aluminum bracket that is in between the block and the steel adjuster bracket.
one of the lobes broke off of mine, and i don't trust a weld. should i?

sorry for the blurry picture, but the break is clean.

thanks for any help!

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Can you put up a picture of the whole bracket? Lots of us have stuff like that laying around, you might get lucky and someone will recognize the part, or one so close that it could be modified to work.
A weld done by a pro would work fine, but guys who can work with aluminum alloy aren't plentiful. You could try drilling 2 holes to insert heavy wire as a reinforcement, like rebar in concrete, then JB Weld it.

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1986 560SL
2002 Toyota Camry
1993 Lexus

I had my cracked alternator bracket welded and it's been working for 2 years now.

You have nothing to lose.

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1991 190e 2.6 190,000mi