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Fig. 171: Cylinder Head Bolt Tightening Sequence (Right)
Courtesy of GENERAL MOTORS CORP.
10. Tighten the first design cylinder head bolts.
Tighten:
1. Tighten the first design M11 cylinder head bolts a first pass in sequence to 30 N.m (22 lb ft).
2. Tighten the first design M11 cylinder head bolts a second pass in sequence to 90 degrees using the
J 45059
.
3. 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
.
4. 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.
11. Tighten the second design cylinder head bolts.
Tighten:
1. Tighten the second design M11 cylinder head bolts (1-10) a first pass in sequence to 30 N.m (22 lb
ft).
2. Tighten the second design M11 cylinder head bolts (1-10) a second pass in sequence to 90 degrees
using the
J 45059
.
3. Tighten the second design M11 cylinder head bolts (1-10) a final pass in sequence to 70 degrees
using the
J 45059
.
4. 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.
NOTE:
Refer to Fastener Notice .
2004 Chevrolet Corvette
2004 ENGINE PERFORMANCE Engine Mechanical (Repair Instructions 1 Of 3) - 5.7L - Corvette
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