torqueing down gsr head pattern....
ok i went and looked up the pattern and saw that there was two ways on how to do it.
1) the spiral pattern.
intake------------------------9-5-1-3-7
exhaust----------------------8-4-2-6-10
2 theres this one.
intake--------------------9-5-1-3-7
exhaust-----------------10-6-2-4-8
which one should i use???
oh yeah and i have eagle head studs going in too.
1) the spiral pattern.
intake------------------------9-5-1-3-7
exhaust----------------------8-4-2-6-10
2 theres this one.
intake--------------------9-5-1-3-7
exhaust-----------------10-6-2-4-8
which one should i use???

oh yeah and i have eagle head studs going in too.
Last edited by dk=gsr; Jan 3, 2011 at 12:20 PM.
Joined: Jan 2002
Posts: 29,940
Likes: 59
From: Nowhere and Everywhere
Number 1, most definitely. #2 will likely result in uneven torque application. DO NOT use #2.
Where exactly did you find that #2 pattern?
Where exactly did you find that #2 pattern?
Number 1 for sure.
Do it in steps. Start with 20lbs run through all ten of them then jump to 40lbs then 65lbs.
I usually torque my ARP studs to 68lbs.
Do it in steps. Start with 20lbs run through all ten of them then jump to 40lbs then 65lbs.
I usually torque my ARP studs to 68lbs.
CYLINDER HEAD BOLT TORQUE SPECS (tightening) / (loosening)
8, 4, 2, 6, 10 <---intake order 3, 7, 9, 5, 1
7, 3, 1, 5, 9 <---exhaust order 4, 8, 10, 6, 2
Torque in steps: 22ft-lbs (264in-lbs), Then to 63ft-lbs (756in-lbs) (final spec) 94+ Teg
Torque in steps: 22ft-lbs (264in-lbs), Then to 61ft-lbs (732in-lbs)(final spec) 90-93 Teg / B16's
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his pattern may be the opposite of mine but its similar.
8, 4, 2, 6, 10 <---intake order 3, 7, 9, 5, 1
7, 3, 1, 5, 9 <---exhaust order 4, 8, 10, 6, 2
Torque in steps: 22ft-lbs (264in-lbs), Then to 63ft-lbs (756in-lbs) (final spec) 94+ Teg
Torque in steps: 22ft-lbs (264in-lbs), Then to 61ft-lbs (732in-lbs)(final spec) 90-93 Teg / B16's
-
-
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his pattern may be the opposite of mine but its similar.
Joined: Jan 2002
Posts: 29,940
Likes: 59
From: Nowhere and Everywhere
meh neither of those orders are as good as the first order you posted in your OP. That's really the only TRUE criss-cross tightening sequence that will ensure the most evenly applied torque on the bolts/studs.
Image from the "how to build a reliable LSVTEC/B20VTEC" thread, same as the first sequence you posted in the OP:

The other orders you described sound more like the cam place cover sequence, but those have 14 bolts each.
Image from the "how to build a reliable LSVTEC/B20VTEC" thread, same as the first sequence you posted in the OP:

The other orders you described sound more like the cam place cover sequence, but those have 14 bolts each.
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