Removal

Fig. 6 Cylinder Head Assembly:

DESCRIPTION
The aluminum alloy cylinder heads shown in Fig. 6 are held in place by 9 bolts. The spark plugs are located in peak of the wedge between the valves.

REMOVAL
1. Drain cooling system and disconnect negative battery cable. Remove intake manifold, and throttle body. Refer to Engine/Intake Manifold/Service and Repair.
Service and Repair

2. Disconnect coil wires, sending unit wire, heater hoses and by-pass hose.
3. Remove closed ventilation system, evaporation control system and cylinder head covers.
4. Remove exhaust manifolds.
5. Remove rocker arm and shaft assemblies. Remove push rods and identify to insure installation in original locations.

Fig. 7 Cylinder Head Bolts Location:

6. Remove the 9 head bolts from each cylinder head and remove cylinder heads Fig. 7.

INSPECTION
1. Before cleaning, check for leaks, damage and cracks.
2. Clean cylinder head and oil passages.

Fig. 8 Check Cylinder Head:

3. Check cylinder head for flatness Fig. 8.
4. Inspect all surfaces with a straightedge if there is any reason to suspect leakage. If out of flatness exceeds 0.019 mm (0.00075 inch). times the span length in inches in any direction, either replace head or lightly machine the head surface. As an example, if a 12 inch span is 1 mm (0.004 inch) out of flat, allowable is 12 x 0.019 mm (0.00075 inch) equals 0.22 mm (0.009 in.). This amount of out of flat is acceptable.

NOTE: Maximum of 0.2 mm (0.008 inch) for grinding is permitted.

CAUTION: This is a combined total dimension of stock removal from cylinder head and block top surface.