Left Handed thread on tensioner pulley Bolt? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 10-23-2012, 10:54 PM   #1
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Default Left Handed thread on tensioner pulley Bolt?

Can anyone confirm that on my 3.8 PA 1997 base, not super charged, that when I remove the singular 3" smooth idler pulley BOLT...is it a Left handed bolt, or clockwise to loosen it?
Does 37 ft/lbs sound about right for torque?
Thanks for help on this one.
This is where a FSM would be helpful!
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Old 10-23-2012, 11:24 PM   #2
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RIGHTY LOOSEY, LEFTY TIGHTY.

I tried looking up the torque specs on AllData, but I can't seem to find it.
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Old 10-23-2012, 11:26 PM   #3
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And I don't know how well the torque would work. When you tighten it, it will actually move the whole arm assembly.
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Old 10-24-2012, 09:53 AM   #4
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Thanks Mike, Left handed thread!
Ya one will have to hold arm with a gripper of some sort or bar, while torque is applied.
I guess some thread locker would be a good idea as well on this bolt?
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Old 10-24-2012, 11:36 AM   #5
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It sure wouldn't hurt!
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Old 10-25-2012, 09:01 AM   #6
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Now you have me wanting to change mine Art, the tensioner is fine, and it stills has the right tension, but I not mind replacing that idler pulley, let me know how hard of a job it was for you when done.

Some day I plan to replace the whole idler assembly, and put the aluminum coolant elbow on, but it will be a while before I can afford to do all that, I still have so much other stuff I need to do.
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Old 10-28-2012, 03:25 AM   #7
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Quote:
Originally Posted by Soft Ride View Post
Thanks Mike, Left handed thread!
Ya one will have to hold arm with a gripper of some sort or bar, while torque is applied.
I guess some thread locker would be a good idea as well on this bolt?
I've never needed to hold the arm or use any thread locker, but I don't think blue Loc-tite would hurt. Just tighten it as you normally would. Being reverse threaded, it kind of takes care of itself; you won't be able to move the tensioner arm until the bolt is torqued.
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Old 10-28-2012, 04:02 PM   #8
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From what I've read in various write ups on the 'net, 37 lb ft is the correct torque spec, and a little blue Loc-Tite wouldn't hurt. At least my PA didn't seem to mind..
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