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 Post subject: manifold torque
PostPosted: Thu Dec 14, 2006 2:42 pm 
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2 BBL ''SuperSix''

Joined: Mon Oct 24, 2005 4:59 am
Posts: 23
Location: northern virginia
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i was assembling my '61 225 the other day. when checking the torque specs for the manifold, it reads 20 ft. lbs. for manifold studs. bolting the intake to exhaust is 25 ft. lbs. that seems a little wimpy. is that right?


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 Post subject:
PostPosted: Thu Dec 14, 2006 3:02 pm 
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Turbo EFI
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Joined: Sun Nov 03, 2002 1:49 pm
Posts: 2445
Location: Lubbock, TX
Car Model:
The two outboard bolts and inner stud nut (or bolt, whatever you have) should be 20-25ft-lbs of torque. The nuts that hold the manifolds to the head studs should only be 10-12ft-lbs. It dosn't take much because the manifolds expand and contract. If the fasteners are to tight, its not a question of if but when the exhaust manifold will crack.


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 Post subject:
PostPosted: Wed Jan 31, 2007 11:17 am 
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3 Deuce Weber
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Joined: Mon Feb 13, 2006 1:23 pm
Posts: 69
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Quote:
The two outboard bolts and inner stud nut (or bolt, whatever you have) should be 20-25ft-lbs of torque. The nuts that hold the manifolds to the head studs should only be 10-12ft-lbs. .
Eric, can I torque these with the smaller 3/8 drive torque ratchet? I believe it does in./lbs instead of ft./lbs?

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 Post subject:
PostPosted: Wed Jan 31, 2007 8:14 pm 
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Turbo EFI
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Joined: Sun Nov 03, 2002 1:49 pm
Posts: 2445
Location: Lubbock, TX
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You could use an inch-pounds torque wrench, so long as it goes to 300 in-lbs (25ft-lbs is 300in-lbs). Heck, I use my 1/4" sockets to tighten the manifold to head nuts, just use adapters so I can use my 1/2" drive ft-lb torque wrench.


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 Post subject:
PostPosted: Thu Feb 01, 2007 4:53 am 
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3 Deuce Weber

Joined: Wed Nov 01, 2006 12:01 pm
Posts: 67
Location: North Jersey
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Quote:
Heck, I use my 1/4" sockets to tighten the manifold to head nuts, just use adapters so I can use my 1/2" drive ft-lb torque wrench.
Yeah, I did mine the same way, much easier with 1/4" socket / extension than adapt to your torque wrench drive size...

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'71 Swinger /6-225
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