Cylinder Head Assembly: Service and Repair

Cylinder Head And Valve Train:

Fig. 6 Cylinder head bolt torque sequence:

REMOVE OR DISCONNECT
1. Negative battery cable.
2. Intake manifold.
3. Exhaust manifold.
4. Valve covers.
5. Front (Left) Cylinder Head:
^ C3I and spark plug wires.
^ Alternator bracket.
^ One A/C compressor bracket bolt.
6. Rear (Right) Cylinder Head:
^ Power steering pump.
^ Belt tensioner assembly.
^ Fuel line heat shield.
5. Rocker arm assemblies, guide plate and pushrods.
6. Cylinder head bolts and cylinder head.
7. Clean all gasket mating surfaces, cylinder head bolt holes in block and bolts.

INSTALL OR CONNECT
1. Cylinder head gasket on block.

CAUTIONS:
^ This engine uses special torque to yield head bolts. This design bolt requires a special tightening procedure. Failure to follow the given procedure will cause head gasket failure and possible engine damage.

^ Should you reach 81 Nm (60 lbs ft) at any time in Steps 3 and 4, you should STOP. Do NOT complete the balance of the 90° turn on this bolt.

2. Apply GM P/N 1052080 sealant to cylinder head bolt threads and tighten to 34 Nm (25 lbs ft) in sequence shown in figure 6.
3. Tighten each bolt 1/4 turn (90°) in sequence.
4. Tighten each bolt an additional 1/4 turn (90°) in sequence.
5. Pushrods, guide plate and rocker arm assemblies. Apply GM P/N 1052624 to rocker arm pedestal bolts before assembly and tighten to 38 Nm (28 lbs ft).
6. Intake manifold.
7. Valve covers.
8. Exhaust manifold.
9. Front (Left) Cylinder Head:
^ A/C compressor bracket bolt and tighten to 70 Nm (52 lbs ft).
^ Alternator support bracket to cylinder head and alternator.
^ C3I and spark plug wires.
10. Rear (Right) Cylinder Head:
^ Belt tensioner assembly.
^ Power steering pump.
^ Fuel line heat shield.
11. Negative battery cable.

Inspect For
^ Correct oil and coolant levels.
^ Fluid leaks.