Cylinder Head Replacement - Right

Cylinder Head Replacement - Right

Tools Required
- J36660-A Torque Angle Meter
- J42385-100 Thread Repair Kit (Cylinder Head/Main Bearing Bolt)

Removal Procedure
1. Remove the valve rocker arms and pushrods.
2. Remove the engine coolant air bleed pipe and covers.
3. Remove the exhaust manifold.





4. Remove the oil level indicator tube bolt.
5. Reposition the oil level indicator tube, if necessary.
6. Remove the wiring harness from the clip at the rear of the cylinder head.

Important: The cylinder head bolts are NOT reusable.





7. Remove the cylinder head bolts.

Notice: After removal, place the cylinder head on two wood blocks to prevent damage.

8. Remove the cylinder head.





9. Remove the cylinder head gasket.
10. Discard the gasket.
11. Discard the cylinder head bolts.
12. Clean and inspect the cylinder head.

Installation Procedure

Important:
- Do not reuse the cylinder head bolts. Install NEW cylinder head bolts during assembly.
- Do not use any type of sealant on the cylinder head gasket (unless specified).
- The cylinder head gasket must be installed in the proper direction and position.

Caution: Wear safety glasses in order to avoid eye damage.

Notice: Clean all dirt, debris, and coolant from the engine block cylinder head bolt holes. Failure to remove all foreign material may result in damaged threads, improperly tightened fasteners or damage to components.





1. Clean the engine block head bolt holes (if required).
Thread repair tool J42385-107 may be used to clean the threads of the old threadlocking material.
2. Spray cleaner GM U.S. P/N 12346139, P/N 12377981, Canada P/N 10953463, or equivalent into the hole.
3. Clean the cylinder head holes with compressed air.
4. Check the cylinder head locating pins for proper installation.





5. Install the NEW cylinder head gasket onto the locating pins.

Important: When properly installed, the tab on the right cylinder head gasket will be located left of center, or closer to the front of the engine, and the words "This Side Up", and the engine displacement, will be visible.





6. Inspect the gasket for proper installation.





7. Install the cylinder head onto the locating pins and the gasket.
8. Install NEW cylinder head bolts.

Notice: Refer to Fastener Notice in Service Precautions.

Cylinder Head Bolt Tightening Sequence:

9. Tighten the cylinder head bolts.
9.1. Tighten the M11 cylinder head bolts (1-10) a first pass in sequence to 30 Nm (22 ft. lbs.).
9.2. Tighten the M11 cylinder head bolts a second pass in sequence to 90 degrees using the J36660-A.
9.3. Tighten the M 11 cylinder head bolts (1,2,3,4,5,6,7,8) to 90 degrees and the M11 cylinder head bolts (9 and 10) to 50 degrees a final pass in sequence using J36660-A.
9.4. Tighten the M8 cylinder head bolts (11-15) to 30 Nm (22 ft. lbs.).
Begin with the center bolt (11) and alternating side-to-side, work outward tightening all of the bolts.
10. Install the wiring harness to the clip at the rear of the cylinder head.
11. Position the oil level indicator tube into place.





12. Install the oil level indicator tube bolt.
Tighten the oil level indicator tube bolt to 25 Nm (18 ft. lbs.).
13. Install the exhaust manifold.
14. Install the engine coolant air bleed pipe.
15. Install the valve rocker arms and pushrods.