Torqe Sequences - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 03-25-2004, 05:43 PM   #1
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Default Torqe Sequences

I am in the process of doing a full valve job on my car. I need to know two different torque sequences and specifications. First I need to know the torque specifications for tightening down the intake manifold. Second What is the sequence in which i tighten down the head bolts, and to what torque? OH yeah I just thought of another question... Are the rockers the adjustable kind, and if so how do I adjust them?
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Old 03-25-2004, 05:46 PM   #2
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The one time I could really use the factory manuals and they're in the trunk of the car at work....
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Old 03-25-2004, 07:55 PM   #3
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Intake Manifold to Cylinder Head (Lower) 88 LB. In. or 10 N-m
Intake Manifold Upper To Lower 22 Ft. Lb. or 30 N-m
Cylinder Heads to to Block 35 Lb. Ft. or 47 N-m

Cylinder Head Bolt Tightening Sequence (from the exhaust side of the head)

6 1 3 7
8 4 2 5

Intake Manifold Bolt Tightening Sequence

7 3 1 5 9
8 4 2 6 10
FRONT

Enjoy
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Old 03-25-2004, 11:55 PM   #4
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What about the rocker question?
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Old 03-26-2004, 01:05 AM   #5
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They don't look adjustable from the diagram in the book, although the L27 got roller rockers while the L67 didn't...
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Old 03-26-2004, 03:26 PM   #6
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Quote:
Originally Posted by Damemorder
Cylinder Head Bolt Tightening Sequence (from the exhaust side of the head)
Also be sure that the bolt threads are clean, and apply a drop of oil to each to ensure an accurate torque reading.
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Old 03-27-2004, 01:44 AM   #7
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i am buying new head bolts anyway, and i will probably spray them with a little WD-40, and put on some thread lock.
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Old 03-27-2004, 02:51 AM   #8
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You need new bolts. They're stretch-torque, and only good for one use.
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Old 03-27-2004, 02:53 AM   #9
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i know i need new bolts... i had planned on getting them...
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Old 03-29-2004, 11:36 AM   #10
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Quote:
Originally Posted by Ryan2Dope
i am buying new head bolts anyway, and i will probably spray them with a little WD-40, and put on some thread lock.
At the risk of sounding totally anal about this, I would do it exactly as the manual dictates, which is a drop or two of clean oil on clean threads, and that'* that. No WD-40; no thread lock. You want to get accurate torque readings and an accurate torque-to-yield turn at the end, and I wouldn't say that WD-40 or thread lock are going to help there; the thread lock in particular may give you a false reading on the wrench.
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