04-23-2008, 07:41 PM
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CC Member
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Join Date: Dec 2000
Location: Broken Arrow. OK ( South Tulsa), USA,
OK
Cobra Make, Engine: 66 COBRA FE 427 /4SP. (HCS Coupe w/ 408 Stroker and TKO 600 -sold)
Posts: 5,595
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Notice the torque is measured in INCH POUNDS up to the 5/16" bolts (to arrive at foot pounds divide the torque by 12) and I think these are for grade 5 bolts. Even if you are bolting down aluminium heads you still need about 105 ft lbs of torque but you MUST use the special washers (I just bought some for about $65.00) that go with the ARP Bolts.
Bolt Torque Specifications
BOLT SIZE TORQUE
1/4-20 85 in-lb
1/4-28 103 in-lb
5/16-18 180 in-lb
5/16-24 198 in-lb
3/8-16 22 ft-lb
3/8-24 30 ft-lb
7/16-14 42 ft-lb
7/16-20 47 ft-lb
1/2-13 65 ft-lb
1/2-20 77 ft-lb
9/16-12 95 ft-lb
9/16-18 105 ft-lb
5/8-11 110 ft-lb
5/8-18 120 ft-lb
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Last edited by Clois Harlan; 04-23-2008 at 07:46 PM..
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Torque Specs
Linear Mode
