Cylinder Head Replacement - Left

Cylinder Head Replacement - Left

Removal Procedure





1. Drain the cooling system.
2. Remove the intake manifold.
3. Remove the valve rocker arms and pushrods.
4. Remove the engine harness ground bolts.
5. Reposition the engine harness grounds (3 and 4) and ground strap (5) from the cylinder head.





6. Remove the water crossover.
7. Remove the exhaust manifold.
8. Remove and discard the cylinder head bolts (1, 2, and 3).





Important: Place the cylinder head on two wood blocks to prevent damage to the sealing surfaces.

9. Remove the cylinder head.





10. Remove and discard the cylinder head gasket.
11. 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 marks to face up. Ensure that the head gasket tabs are located over the numbers 1 and 2 cylinders for correct installation.





1. Place a NEW cylinder head gasket into position.





2. Install the cylinder head.





Notice: Always use NEW cylinder head bolts when servicing the cylinder head.
Do not reuse the cylinder head bolts, because the bolts may stretch or break causing 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 head bolts, apply sealer GM P/N 12346004 or equivalent to the cylinder head bolts.





Notice: Refer to Fastener Notice in Service Precautions.

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. This short bolts are used in locations 4, 5, 12, and 13.

4. Install the cylinder head bolts.
4.1. Tighten the cylinder head bolts a first pass in sequence to 30 Nm (22 ft. lbs.)
4.2. Tighten the cylinder head bolts a second pass in sequence to 30 Nm (22 ft. lbs.) then an additional 120 degrees using J 36660-A.
4.3. Tighten the bolts (1, 2, 3, 6, 7, 8, 9, 10, 11, 14, 16, 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 in sequence using J 36660-A.
5. Install the exhaust manifold.
6. Install the water crossover.





7. Position the engine harness grounds (3 and 4) and ground strap (5) to the cylinder head.
8. Install the engine harness ground bolts.
- Tighten the engine harness ground bolts to 16 Nm (12 ft. lbs.).
9. Install the valve rocker arms and pushrods.
10. Install the intake manifold.
11. Fill the cooling system.