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Old 12-16-2012, 02:42 PM   #1
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97 4.0 belt tensioner stripped

I went to adjust my belt tension-er and found the bolt on my idler pulley loose. I tried to tighten it and it seemed stripped or stripping. I pulled the bolt and examined it, it's a grade 8 and yes the threads have minor damage. I am concurred that the traveling adjuster nut is also damaged.

Is this a Jeep only part? is the traveling nut sold separately or as an assembly?

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Old 12-16-2012, 03:10 PM   #2
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if the bolt is the same for a 2000 40L id like to know as well, i just stripped the head of the bolt trying to get mine out for my 2000 4.0 waiting to get it drilled out.

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Old 12-17-2012, 02:48 PM   #3
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I can't believe it, Auto Zone, Advanced Auto, O'Rilies and Fastenal don't stock a 10mm x 1.5 x 50 bolt. It's a dealer item.

My dealer says he need the serial number to look it up. I need to replace the bolt, the adjusting or traveling nut, I could just weld a common nut on the back.
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Old 12-17-2012, 07:49 PM   #4
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I was able to get mine out with some vice grips after which Filed two sides down so could get better grip if I have to undo again. I was thinking bout welding a nut to. It don't have a welder might be a wise investment
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Old 12-18-2012, 05:03 PM   #5
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I recently broke the adjustment bolt on my 98 4.0 and I had to go through the dealer to get a replacement. I did not have to give any serial number, just the model and year. I got a new bolt and nut for about $20.
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Old 12-18-2012, 07:36 PM   #6
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Try McMaster.com they are the best. Click here: McMaster-Carr
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Old 12-19-2012, 03:15 PM   #7
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I ordered the bolt and traveling nut from Jeep yesterday and picked them up today,I figured if I damaged the bolt thread I needed to replace the nut too.

For those interested,
The bolt PN 34202029 cost $7.16
The nut PN 53010149 cost $11.51

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