Cylinder Head Replacement - Right
Cylinder Head Replacement - RightRemoval Procedure
1. Drain the cooling system.
2. Remove the intake manifold.
3. Remove the valve rocker arms and pushrods.
4. Disconnect the Engine Coolant Temperature (ECT) sensor electrical connector.
5. Remove the ECT sensor connector from the indicator tube.
6. Remove the indicator tube bolt.
7. Remove the ECT sensor.
8. Remove the heater inlet and outlet hoses from the hose bracket.
9. Remove the heater hose bracket bolts and bracket from the cylinder head.
10. Remove the water crossover.
11. Remove the exhaust manifold.
12. Remove and discard the cylinder head bolts (1, 2, and 3).
Important: Place the cylinder head on two wood block to prevent damage to the sealing surface.
13. Remove the cylinder head.
14. Remove and discard the cylinder head gasket.
15. Clean and inspect the cylinder head.
Installation Procedure
Important: Make sure the threaded holes in the engine block are clean and not damaged. Do not use sealer on any engines that use a composition type gasket. Align the cylinder head gasket locating mark to face up. Ensure that the head gasket tabs are located over the numbers 1 and 2 cylinders for correct installation.
1. Install a NEW cylinder head gasket.
2. Install the cylinder head.
Notice: Do not reuse the cylinder head bolts. NEW cylinder head bolts must be used. The cylinder head bolts are torque-to-yield bolts and cannot be reused once the initial torque is applied. During the initial torque of the cylinder head bolt the cylinder head bolt is stretched to achieve proper clamp load. Proper clamp load will not be achieved if a used cylinder head bolt is torqued again. A stretched cylinder head bolt can also break when torqued. Failure to replace the used cylinder head bolts with NEW cylinder head bolts can lead to improper clamp loads and extensive engine damage.
Important: The sealer must be applied to a minimum of eight threads starting at the point of the cylinder head bolt.
3. If not pre-applied to the new cylinder heads bolts, apply sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent to the cylinder head bolts.
4. Install the cylinder head bolts. (1, 2, and 3).
Notice: Refer to Fastener Notice in Service Precautions.
Fastener Notice
Important: The long bolts are used in locations 1, 2, 3, 6, 7, 8, 9,10, 11,14, 16, and 17. The medium length bolts are used in locations 15 and 18. The short bolts are used in locations 4, 5, 12, and 13.
5. Tighten the cylinder head bolts.
5.1. Tighten the bolts in sequence a first pass to 30 Nm (22 ft. lbs.).
5.2. Tighten the bolts in sequence a second pass to 30 Nm (22 ft. lbs.) then an additional 120 degrees using J36660-A.
5.3. Tighten bolts (1, 2, 3, 6, 7, 8, 9, 10, 11, 14, 16, and 17) an additional 60 degrees, bolts (15, and 18) an additional 45 degrees, and bolts (4, 5, 12, and 13) an additional 30 degrees a final pass using J36660-A.
6. Install the exhaust manifold.
7. Install the water crossover.
8. Install the heater hose bracket and bolts to the cylinder head.
Tighten the bolts to 50 Nm (37 ft. lbs.).
9. Install the heater inlet and outlet hoses to the hose bracket.
10. Apply sealant GM P/N 12346004 (Canadian P/N 10953480), or equivalent to the threads of the ECT sensor.
11. Install the ECT sensor to the cylinder head.
Tighten the ECT sensor to 20 Nm (15 ft. lbs.).
12. Install the indicator tube bolt.
Tighten the bolt to 25 Nm (18 ft. lbs.).
13. Install the ECT sensor connector to the indicator tube.
14. Connect the ECT sensor electrical connector.
15. Install the valve rocker arms and pushrods.
16. Install the intake manifold.
17. Drain the cooling system.