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Old 01-01-2011, 09:21 PM
JEBalles's Avatar
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Cross-threaded Motor Mount Arm

I'm not sure if this belongs here or not since it's more of a general question, but I figured I'd find the answer nonetheless. Moderators, feel free to move.

Well, I've gone and cross-threaded what looks like maybe the first four or five threads in the drivers side motor mount arm. I already have a tap of the right dimensions, should I just use that or should I go out and buy a real thread chaser? Do I have to get a new arm?

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Old 01-01-2011, 09:32 PM
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What is the part # on the arm? I have a set that are not for a 126 and have no use for them.
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Old 01-01-2011, 09:37 PM
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It's 615 223 13 04, but these are my 616 arms that I'm using with a 617. The 617 arm probably has a different number cause it needs a place to mount the shock. If it has 617 as the first three numbers, it's probably for a W123 300D. Either will do.
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Old 01-01-2011, 09:49 PM
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no better place for this thread than here on Diesel Discussion!

I'd not try to clean the threads, I'd either put in a helicoil or the like, or replace the arm. heck, if you have a 617 in a 240, I'd get a set of 617 arms, and drill a place for the shocks!

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