C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Muffler Clamp Bolt Torque Spec ????

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Old Apr 3, 2013 | 04:53 PM
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Default Muffler Clamp Bolt Torque Spec ????

Does anyone have an exact torque spec for basic steel muffler clamps ?

Seems every time i try to tighten the bolts either they are too loose and get exhaust leaks or i over tighten them and bend the pipes.

Thanks!
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Old Apr 3, 2013 | 05:53 PM
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According to Google ...... 40 to 80 ft. lbs. -- varies per manufacturer of clamp (not much help).

My experience has been to torque until you see the pipe indent, then
grab a beer.
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Old Apr 3, 2013 | 08:36 PM
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I believe there has never been a muffler clamp that has been torqued in the past 20 years. They are not supposed to be torqued; just tightened.
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Old Apr 4, 2013 | 01:40 PM
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Originally Posted by 383vett
I believe there has never been a muffler clamp that has been torqued in the past 20 years. They are not supposed to be torqued; just tightened.
What about the muffler bearings? I hear they can squeak if over tightened.
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Old Apr 4, 2013 | 01:41 PM
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That's just a myth.
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Old Apr 4, 2013 | 01:56 PM
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Thanks everyone i googled it also but the torque specs were all over the place i figured someone on here would have had a more accurate idea !

I'll start again at 20 and work my way up

Thanks !
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Old Apr 4, 2013 | 02:20 PM
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Dude , April fools was a few days ago...Your to late....WW
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Old Apr 4, 2013 | 02:53 PM
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Originally Posted by WW7
Dude , April fools was a few days ago...Your to late....WW
Not an aprils fools day question i was serious !

It seems rebuilding an engine is easier than something as simple as not over tightening a muffler clamp bolt !
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Old Apr 4, 2013 | 03:19 PM
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Originally Posted by GQ-ROD
Not an aprils fools day question i was serious !

It seems rebuilding an engine is easier than something as simple as not over tightening a muffler clamp bolt !
Then weld them instead of using a clamp...WW
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Old Apr 4, 2013 | 06:02 PM
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Originally Posted by GQ-ROD
Not an aprils fools day question i was serious !

It seems rebuilding an engine is easier than something as simple as not over tightening a muffler clamp bolt !


Maybe the guy at the local muffler shop can help.
I'm wondering what he sets his air impact at?
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Old Apr 4, 2013 | 06:21 PM
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Originally Posted by JrRifleCoach


Maybe the guy at the local muffler shop can help.
I'm wondering what he sets his air impact at?
2 clicks from the left.
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