Cylinder Head Assembly: Specifications

CYLINDER HEAD BOLT RE-USABILITY:

Engine cylinder head bolts should be reused only once. Replace the head bolts if they were used before or if they have a paint dab on the top of the bolt.

CYLINDER HEAD SURFACE VARIATION:

Checking Cylinder Head Flatness:

Maximum Allowable Surface Variation .008"

Use a straightedge and feeler gauge to check the flatness of the engine cylinder head and block mating surfaces.

CYLINDER HEAD BOLT TORQUE/SEQUENCE:

NOTE: Coat the threads of bolt No.7, only, with Loctite PST sealant or equivalent.

CAUTION: During the final tightening sequence, bolt No.7 will be tightened to a lower torque than the rest of the bolts. DO NOT overtighten bolt No.7.





Tighten the engine cylinder head bolts in sequence according to the following procedure:
a. Tighten all bolts in sequence (1 through 10) to 30 Nm (22 ft. lbs.) torque.
b. Tighten all bolts in sequence (1 through 10) to 61 Nm (45 ft. lbs.) torque.
c. Check all bolts to verify they are set to 61 Nm (45 ft. lbs.) torque.
d. Tighten bolts (in sequence):
^ Bolts 1 through 6 to 149 Nm (110 ft. lbs.) torque.
^ Bolt 7 to 136 Nm (100 ft. lbs.) torque.
^ Bolts 8 through 10 to 149 Nm (110 ft. lbs.) torque.
e. Check all bolts in sequence to verify the correct torque.
f. If not already done, clean and mark each bolt with a dab of paint after tightening. Should you encounter bolts that were painted in an earlier service operation, replace them.

INTAKE/EXHAUST MANIFOLD BOLT TORQUE/SEQUENCE:






1. Tighten bolt No.1 to 41 Nm (30 ft. lbs.) torque.
2. Install the intake manifold on the cylinder head dowels.
3. Install bolts 2 through 5. Tighten these bolts to 31 Nm (23 ft. lbs.) torque.
4. Install new engine exhaust manifold spacers over the engine exhaust manifold mounting studs in the cylinder head.
5. Tighten nuts 6 and 7 to 31 Nm (23 ft. lbs.) torque.

CAMSHAFT GEAR/SPROCKET SPECIFICATIONS:

Camshaft Sprocket Bolt 108 Nm (80 ft. lbs.)