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Fig. 111: 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 (1-10) a first pass in sequence to 30 N.m (22 lb ft).
2. Tighten the first design M11 cylinder head bolts (1-10) 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 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 engine block 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 in Cautions and Notices.
2004 Chevrolet Corvette
2004 ENGINE PERFORMANCE Engine Mechanical (Repair Instructions 3 Of 3) - 5.7L - Corvette
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