Cylinder head bolt question
Thread Starter
Racer
Joined: Feb 2003
Posts: 332
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From: McHenry IL
Cylinder head bolt question
I need to put my cylinder head back on with GM bolts tonight but I am not sure how to torque it. Mine is a later 04 after they switched to shorter head bolts (the 10 main bolts are all they same size, the same length as the 2 medium length bolts with the older setup). I do not know if I should use the same torque procedure for the bolts in those positions (90 & 90) or use the procedure for the same length bolts (90 & 50)? Anyone have a manual for an 04 that might have that info? My 02 manual is not helping me hear.
Thanks, Scott
Thanks, Scott
Team Owner
Joined: Sep 2001
Posts: 23,283
Likes: 906
From: Lake Elsinore, CA
Here's what the 2004 manual says:
Tighten the first design cylinder head bolts. (This is the 155mm/100mm bolt head setup.)
>Tighten the first design M11 cylinder head bolts a first pass in sequence to 30 N·m (22 lb ft).
>Tighten the first design M11 cylinder head bolts a second pass in sequence to 90 degrees using the J 45059 .
>Tighten the first design M11 cylinder head bolts (1, 2, 3, 4, 5, 6, 7, 8) to 90 degrees and the M11 cylinder head bolts (9 and 10) to 50 degrees a final pass in sequence to using the J 45059 .
>Tighten the M8 cylinder head bolts (11, 12, 13, 14, 15) to 30 N·m (22 lb ft). Begin with the center bolt (11) and alternating side-to-side, work outward tightening all of the bolts.
Tighten the second design cylinder head bolts. (This is the 100mm-only bolt head setup.)
>Tighten the second design M11 cylinder head bolts (1-10) a first pass in sequence to 30 N·m (22 lb ft).
>Tighten the second design M11 cylinder head bolts (1-10) a second pass in sequence to 90 degrees using the J 45059 .
>Tighten the second design M11 cylinder head bolts (1-10) a final pass in sequence to 70 degrees using the J 45059 .
>Tighten the M8 cylinder head bolts (11, 12, 13, 14, 15) to 30 N·m (22 lb ft). Begin with the center bolt (11) and alternating side-to-side, work outward tightening all of the bolts.
Tighten the first design cylinder head bolts. (This is the 155mm/100mm bolt head setup.)
>Tighten the first design M11 cylinder head bolts a first pass in sequence to 30 N·m (22 lb ft).
>Tighten the first design M11 cylinder head bolts a second pass in sequence to 90 degrees using the J 45059 .
>Tighten the first design M11 cylinder head bolts (1, 2, 3, 4, 5, 6, 7, 8) to 90 degrees and the M11 cylinder head bolts (9 and 10) to 50 degrees a final pass in sequence to using the J 45059 .
>Tighten the M8 cylinder head bolts (11, 12, 13, 14, 15) to 30 N·m (22 lb ft). Begin with the center bolt (11) and alternating side-to-side, work outward tightening all of the bolts.
Tighten the second design cylinder head bolts. (This is the 100mm-only bolt head setup.)
>Tighten the second design M11 cylinder head bolts (1-10) a first pass in sequence to 30 N·m (22 lb ft).
>Tighten the second design M11 cylinder head bolts (1-10) a second pass in sequence to 90 degrees using the J 45059 .
>Tighten the second design M11 cylinder head bolts (1-10) a final pass in sequence to 70 degrees using the J 45059 .
>Tighten the M8 cylinder head bolts (11, 12, 13, 14, 15) to 30 N·m (22 lb ft). Begin with the center bolt (11) and alternating side-to-side, work outward tightening all of the bolts.
