Removal and Installation

NOTE: The alloy aluminum cylinder head shown is held in place by 12, 1/2 inch bolts and 8, 1/4 inch bolts. The spark plugs are located in peak of the chamber between the valves.

REMOVAL
1. Drain cooling system and disconnect negative battery cable.
2. Remove intake manifold, and throttle body assemblies. Refer to Powertrain Management.
3. Disconnect coil wires, sending unit wire, heater hoses.
4. Remove closed ventilation system and cylinder head covers.
5. Remove coolant tube from engine.
6. Remove exhaust manifold heat shields and remove exhaust manifolds.
7. Remove rocker arm and pedestal assemblies. Remove push rods.

NOTE: Identify to insure installation in original locations.

8. Remove the 12 head bolts and 8 valley seal bolts from each cylinder head and remove cylinder heads.

INSTALLATION
1. Clean all surfaces of cylinder block and cylinder heads.

NOTE: A multi-layer steel head gasket is used.





2. Install new gaskets on cylinder block.





3. Tighten the cylinder head bolts 1 thru 12 in the sequence shown in the illustration 2 Step Torque Sequence:
^ First to 47 Nm (35 ft. lbs.).
^ Second to 122 Nm (90 ft. lbs.).
4. Tighten valley bolts A thru H in sequence shown in the illustration to 11 Nm (95 inch lbs.) after head bolts 1 thru 12 have been tightened to specifications.
5. Inspect push rods and replace worn or bent rods.
6. Install push rods, rocker arm and pedestal assemblies into position, tighten to 41 Nm (30 ft. lbs.).





7. Place new cylinder head cover gaskets in position and install cylinder head covers. Tighten bolts in sequence shown in the illustration to 11 Nm (95 inch lbs.).