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Old 02-01-2004, 05:13 PM
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300 td alt mount tensioner rod Help

I hope some one responds who is familliar with this alternator mount system.Even if I remove the whole mount bracket with the alternator,the alternator bracket will have to be bent somehow to release tensioner rod that is pressed into the side of the top bolt head...freakish
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Old 02-02-2004, 01:06 PM
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Location: Evansville, Indiana
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That's a clamp bolt, I believer. Loosen it, and the tensioner rod nut should release.

Some of them have a star wheel on a bolt head -- release the nut on the BACK, then use the star head to tighten/loosen.

Make sure you're turning it the correct direction, too -- I stripped the one on the 280 attempting to remove the alternator belt going the wrong way -- it may not work exactly the way it looks.

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Old 02-02-2004, 04:15 PM
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If you're talking about the bolt shown below, it will come out. Make sure both the top and bottom mount bolts are very loose, and the alternator will rotate back in there more than you think. When mine broke, I bought a new one but cut a few threads off the adjusting rod just to make it easier to put in.
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300 td alt mount tensioner rod Help-f400121335.jpg  
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Old 02-02-2004, 05:42 PM
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I hate that freaky bolt mutation!

Thats the one though.I think part of my mount bracket must have gotten bent because even with everything completly loose the rod was trapped in the bracket.
thanks for your help
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Old 02-02-2004, 07:12 PM
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Location: Millville, NJ
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I am far more familiar with this problem than I'd like to be, having replaced several alternators in the past two years. One problem is that you MUST loosen all the bolts on the top bracket plate because the alternator has an eccentric swing (not a contant radius arc) - that means if the plate bracket can't move freely, the nut on the adjusting bolt eventually binds and the rod begins to bend. Another thing to watch is that after many years of use (my car has 320k miles on it), the through-bolt wears down so that the part going through the bracket gets slotted, trapping the rod in the bracket and making it very difficult to pull out. You really have to fiddle with it, wiggling while you're pulling. It helps if you know some German cuss words and can hurl invectives at it in its native tongue. Sorry I don't have any pictures, but it's too damned cold out.

Best Regards,
Rob Fini

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