Tightening Sequence for LS Main Bolts???
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Tightening Sequence for LS Main Bolts???
I will soon be assembling my engine.
When tightening the M10 main bolts, do you fully tighten the 10 inner bolts including the torque angle step, before tightening the outer bolts any at all?
or
Do you torque the inner bolts to 15 ft-lbs and then tighten the outer to 15 ft-lbs, before you torque angle the inner and then torque angle the outer?
When tightening the M10 main bolts, do you fully tighten the 10 inner bolts including the torque angle step, before tightening the outer bolts any at all?
or
Do you torque the inner bolts to 15 ft-lbs and then tighten the outer to 15 ft-lbs, before you torque angle the inner and then torque angle the outer?
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I have the book shown above by Chris Werner
It says(pg 112) to COMPLETELY TIGHTEN all of the inner bolts before touching the outer bolts.
I also have "How to Build and Modify GM LS-Series Engines" by Joseph Potak.
It says(pg 107) to:
1. torque inner to 16
2. torque outer to 16
3. TTA inner
4. TTA outer
5 Torque side bolts to 18
Which is correct?
It says(pg 112) to COMPLETELY TIGHTEN all of the inner bolts before touching the outer bolts.
I also have "How to Build and Modify GM LS-Series Engines" by Joseph Potak.
It says(pg 107) to:
1. torque inner to 16
2. torque outer to 16
3. TTA inner
4. TTA outer
5 Torque side bolts to 18
Which is correct?
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Thanks, I have Googled it many times.
I know the order 1-30, but what I am uncertain about is if 1-10 are fully tightened including TTA, before touching the 11-20 bolts.
Can someone with a Genuine GM Service Manual please confirm what it says about this?
Thanks, Joel
I know the order 1-30, but what I am uncertain about is if 1-10 are fully tightened including TTA, before touching the 11-20 bolts.
Can someone with a Genuine GM Service Manual please confirm what it says about this?
Thanks, Joel
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From the FSM:
1.Tighten the inner bolts (1-10) a first pass in sequence to 15lb ft.
2.Tighten the inner bolts (1-10) a final pass in sequence to 80 degrees.
3.Tighten the outer studs (11-20) a first pass in sequence to 15lb ft.
4.Tighten the outer studs (11-20) a final pass in sequence to 53 degrees.
5.Tighten the side cap bolts to 18 lbft Tighten the bolt on one side of the bearing cap and then tighten the bolt on the opposite side of the same bearing cap
1.Tighten the inner bolts (1-10) a first pass in sequence to 15lb ft.
2.Tighten the inner bolts (1-10) a final pass in sequence to 80 degrees.
3.Tighten the outer studs (11-20) a first pass in sequence to 15lb ft.
4.Tighten the outer studs (11-20) a final pass in sequence to 53 degrees.
5.Tighten the side cap bolts to 18 lbft Tighten the bolt on one side of the bearing cap and then tighten the bolt on the opposite side of the same bearing cap
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from the fsm:
1.tighten the inner bolts (1-10) a first pass in sequence to 15lb ft.
2.tighten the inner bolts (1-10) a final pass in sequence to 80 degrees.
3.tighten the outer studs (11-20) a first pass in sequence to 15lb ft.
4.tighten the outer studs (11-20) a final pass in sequence to 53 degrees.
5.tighten the side cap bolts to 18 lbft tighten the bolt on one side of the bearing cap and then tighten the bolt on the opposite side of the same bearing cap
1.tighten the inner bolts (1-10) a first pass in sequence to 15lb ft.
2.tighten the inner bolts (1-10) a final pass in sequence to 80 degrees.
3.tighten the outer studs (11-20) a first pass in sequence to 15lb ft.
4.tighten the outer studs (11-20) a final pass in sequence to 53 degrees.
5.tighten the side cap bolts to 18 lbft tighten the bolt on one side of the bearing cap and then tighten the bolt on the opposite side of the same bearing cap
Thanks!!