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Four bolt main torque and tightening sequence

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Old 02-12-2006, 11:59 AM
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Car: 1991 Z28 Vert
Engine: 383 single plane efi
Transmission: T-56
Axle/Gears: 8.8 with 3.73s
Four bolt main torque and tightening sequence

I am measuring clearences/tolerances in my 355 4-bolt main and need to know the torque sequence and torque. The manuals I have only tell for a 2 bolt.
Old 02-12-2006, 06:07 PM
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Car: '88 IROC-Z medium orange metallic
Engine: L98
Transmission: 700R4
Axle/Gears: 3.27
Stock bolts, arp bolts or studs?
Old 02-14-2006, 08:20 AM
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Car: 1991 Z28 Vert
Engine: 383 single plane efi
Transmission: T-56
Axle/Gears: 8.8 with 3.73s
They are new bolts, but not arp bolts or studs.
Old 02-14-2006, 09:26 AM
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Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
IIRC it's 65 ft-lbs on the inners and 55 on the outers. Inners first, then outers, in a couple of stages; like 35-35, then 45-45, then 65-55, then whap the cap with a hammer and re-check.
Old 02-14-2006, 12:57 PM
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Car: Z28
Engine: Sb2.2 406
Transmission: Jerico 4 speed
Axle/Gears: Ford 9" 3.60
For the 7/16" inner/outer, my specs sheet shows 70/65, respectivly.
Old 02-14-2006, 02:23 PM
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Car: trans am
Engine: sbc350, afr 180cc head, comp full roller, xtrem 276,comp 1.6 roller rockers,weiand142
Transmission: tremec tko
Axle/Gears: 8.5 3.73 gear, moser 30 spline axles,eaton posi
i am also showing 70 inners/65 outers on my torque sheet.
Old 02-15-2006, 12:18 PM
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Car: 1991 Z28 Vert
Engine: 383 single plane efi
Transmission: T-56
Axle/Gears: 8.8 with 3.73s
Originally posted by slapi01
i am also showing 70 inners/65 outers on my torque sheet.
Where did you get a torque sheet? I want one.
Do the bolts at the #1 main and #5 main (the mains with only 2 bolts) get 70 as well?
Thanks for the info.
Old 02-15-2006, 12:54 PM
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Car: Z28
Engine: Sb2.2 406
Transmission: Jerico 4 speed
Axle/Gears: Ford 9" 3.60
I no longer have the 2 bolt front and rear caps - are they 7/16? 3/8"?

Try a google search for small block chevy torque specs. Heck, I think they're even on summit's website.
Old 02-15-2006, 01:12 PM
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Axle/Gears: 9 Bolt 3:27
Originally posted by Tibo
Where did you get a torque sheet? I want one.
Do the bolts at the #1 main and #5 main (the mains with only 2 bolts) get 70 as well?
Thanks for the info.
Yes.
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