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Fig. Cylinder head bolt tightening sequence-4.8L, 5.3L and 6.0L engines (click for zoom)
Install the cylinder head bolts in sequence to 22 ft. lbs. (30 Nm). The bolts must be tightened once, then be tightened again in sequence in the following order:
Fig. Cylinder head bolt tightening sequence-5.0L and 5.7L engines
Removal & Installation
5.7L Engine
To Remove:
To Install:
Right Side
NOTE: Clean all dirt, debris, and coolant from the engine block cylinder head bolt holes. Failure to remove all foreign material may result in damaged threads, improperly tightened fasteners or damage to components.
NOTE: Do not use any type of sealant on the cylinder head gasket (unless specified).
Left Side
To Install:
NOTE: Clean all dirt, debris, and coolant from the engine block cylinder head bolt holes. Failure to remove all foreign material may result in damaged threads, improperly tightened fasteners or damage to components.
NOTE: Do not use any type of sealant on the cylinder head gasket (unless specified).
NOTE: Clean all dirt, debris, and coolant from the engine block cylinder head bolt holes. Failure to remove all foreign material may result in damaged threads, improperly tightened fasteners or damage to components.
NOTE: Do not use any type of sealant on the cylinder head gasket (unless specified).
SOURCE: what r the torque specifications on installing a head on 2000 sierra 5.3 and the tightening sequence
You must use new bolts, failure to do so will result in redoing the job.
Tightening sequences
intakes side 15 13 11 12 14
center 10 3 1 5 9
exhaust side 7 6 2 4 8
Step 1
all 11mm bolts 22 ft lbs
Step 2
all 11mm bolts turn add 90deg
Step 3
11mm bolts 1-8 turn add 90 deg
11mm bolts 9 and 10 turn add 50deg
Step 4
all 8mm bolts 22 ft lbs
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