72. Cylinder Head Installation - Left

- Tools Required
- J 36660-A Electronic Torque Angle Meter





1. Clean the cylinder gasket surfaces on the engine block.
2. Inspect the dowel pins (cylinder head locator) for proper installation.
3. Clean the cylinder head gasket surfaces on the cylinder head.





Important: Do not use any type sealer on the cylinder head gasket (unless specified).

4. Place the NEW cylinder head gasket in position over the dowel pins (cylinder head locator).
The cylinder head gasket is not directional and may be installed using either side facing the engine block.





5. Install the cylinder head to the engine block.
Guide the cylinder head carefully into place over the dowel pins and the cylinder head gasket.





6. Apply sealant GM P/N 12346004 or equivalent to the threads of the cylinder head bolts.

Notice: Refer to Fastener Notice in Service Precautions.

7. Install the cylinder head bolts.
- Tighten the bolts in sequence on the first pass to 30 Nm (22 ft. lbs.).





8. Use the J 36660-A in order to tighten the cylinder head bolts in sequence on the final pass.
- Tighten the long bolts (1, 2, 5, 6, 9, 10, and 13) on the final pass in sequence to 75°.
- Tighten the medium bolts (14 and 17) on the final pass in sequence to 65°.
- Tighten the short bolts (3, 4, 7, 8, 11, 12, 15, and 16) on the final pass in sequence to 55°.





9. Measure the NEW spark plugs for the proper gap.
Adjust the spark plug gap if necessary.
- Spark plug gap to 1.52 mm (0.060 inch)
10. Install the NEW spark plugs.
- Tighten the spark plugs for a USED cylinder head to 15 Nm (11 ft. lbs.).
- Tighten the spark plugs for the initial installation of a NEW cylinder head to 30 Nm (22 ft. lbs.).





11. If reusing the Engine Coolant Temperature (ECT) gauge sensor, apply sealant GM P/N 12346004 to the threads of the ECT gauge sensor.
12. Install the ECT gauge sensor.
- Tighten the ECT gauge sensor to 20 Nm (15 ft. lbs.).