U-bolt torque spec? - Team Camaro Tech
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post #1 of 7 (permalink) Old Mar 13th, 10, 08:32 PM Thread Starter
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Mike
 
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U-bolt torque spec?

Recently installed a Hotchkis TVS on my '67. On the rear u-bolts they(Hotchkis) says to torque them to factory specs. Well not many had multi-leafs, in my chassis manual there is not a option/spec for a multi leaf, so without overtightening what is the spec? Thx in advance for help.
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post #2 of 7 (permalink) Old Mar 13th, 10, 09:08 PM
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john
 
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Re: U-bolt torque spec?

Tight!

I never used a torque wrench on mine....

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post #3 of 7 (permalink) Old Mar 14th, 10, 04:50 AM
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Jim
 
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Re: U-bolt torque spec?

I just used a 1/2" impacted on mine
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post #4 of 7 (permalink) Old Mar 14th, 10, 09:02 AM
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Re: U-bolt torque spec?

45lbs is what I recall. You can actually bend the shock plates if you get carried away.

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post #5 of 7 (permalink) Old Mar 14th, 10, 12:39 PM
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Re: U-bolt torque spec?

Those are 5/8" they will take way more than 45 lbs and I think the stock spec would have been closer to 100 ft/lbs
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post #6 of 7 (permalink) Old Mar 14th, 10, 01:22 PM
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Al
 
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Re: U-bolt torque spec?

Quote:
Originally Posted by 400bird View Post
Those are 5/8" they will take way more than 45 lbs and I think the stock spec would have been closer to 100 ft/lbs
They're actually 7/16-20. Really tight with a flat washer and a lock washer is good. They're not grade 8. Lube the threads and use tall nuts. Too tight you could concievably begin to crush the axle tube.

Edit - Oops my bad - Hotchkis does give you some big honkin' 5/8 U-bolts. The factory bolts are 7/16-20. I just used 4 of the factory size. Sorry.


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post #7 of 7 (permalink) Old Mar 14th, 10, 03:39 PM Thread Starter
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Mike
 
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Re: U-bolt torque spec?

Currently I have them so that the poly spring plate bushings have a slight "deflection", seems tight enough but not sure if it should be tighter.
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