Cylinder Head Replacement - Left
Cylinder Head Replacement - Left^ Tools Required
- J 45059 Angle Meter
Removal Procedure
1. Drain the cooling system.
2. Remove the drive belt.
3. Remove the lower intake manifold.
4. Remove the left exhaust manifold.
5. Remove the left side pushrods.
6. Remove the junction block bracket bolt.
7. Position the bracket and wiring harness aside.
8. Loosen the power steering (P/S) pump rear bracket nut.
9. Remove the P/S pump rear bracket front nut.
10. Remove the bolts and nut for the P/S pump bracket.
11. Leave the air conditioning (A/C) compressor, if equipped, and the P/S pump on the bracket.
12. Slide the P/S pump bracket off of the stud and set aside.
13. Remove the P/S pump bracket stud.
14. Remove the harness ground bolt.
15. Position the harness ground (4) and ground strap (5).
16. Remove the engine coolant temperature (ECT) sensor.
17. Remove the spark plugs.
18. Remove the spark plug wire support bolts and support.
19. Remove the cylinder head bolts.
20. Remove the cylinder head.
21. Remove and discard the cylinder head gasket.
22. Remove the cylinder head locator pins, if necessary.
23. Clean and inspect the cylinder head, if necessary.
24. Disassemble the cylinder head, if necessary.
Installation Procedure
1. Assemble the cylinder head, if necessary.
2. Install the cylinder head locator pins, if necessary.
3. Install a NEW cylinder head gasket.
Important:
Do not use any type of sealer on the cylinder head gasket.
4. Install the cylinder head.
5. Apply sealant GM P/N 12346004, (Canadian P/N 109534480), or equivalent to the threads of the cylinder head bolts.
Notice: Refer to Fastener Notice in Service Precautions.
6. Install the cylinder head bolts until snug.
7. Tighten the cylinder head bolts using the sequence shown.
1. Tighten the bolts a first pass to 30 Nm (22 ft. lbs.).
2. Tighten the long bolts (1, 4, 5, 8, 9) a final pass to 75 degrees using J 45059.
3. Tighten the medium bolts (12, 13) a final pass to 65 degrees using J 45059.
4. Tighten the short bolts (2, 3, 6, 7, 10, 11) a final pass to 55 degrees using J 45059.
8. Install the spark plug wire support and bolts.
^ Tighten the bolts to 12 Nm (106 inch lbs.).
9. Install the spark plugs.
10. If installing NEW spark plugs measure for the correct gap. Adjust the spark plug gap if necessary.
Spark plug gap to 1.52 mm (0.060 inch).
^ Tighten the plugs in a USED cylinder head to 15 Nm (11 ft. lbs.).
^ Tighten the plugs on the initial installation of a NEW cylinder head to 30 Nm (22 ft. lbs.).
11. Install the ECT sensor. If reusing the old sensor, apply sealant GM P/N 12346004 (Canadian P/N 109534480), or equivalent to the threads.
^ Tighten the sensor to 20 Nm (15 ft. lbs.).
12. Position the ground strap (5) and harness ground (4).
13. Install the harness ground bolt.
^ Tighten the bolt to 16 Nm (12 ft. lbs.).
14. Install the P/S pump bracket stud.
^ Tighten the stud to 20 Nm (15 ft. lbs.).
15. Slide the P/S pump bracket rearward.
16. Install the bolts and nuts for the P/S pump bracket.
17. Install the P/S pump rear bracket front nut.
18. Tighten the P/S pump rear bracket nut.
^ Tighten the bolts and nuts to 41 Nm (30 ft. lbs.).
19. Position the bracket and wiring harness.
20. Install the junction block bracket bolt.
^ Tighten the bolt to 25 Nm (18 ft. lbs.).
21. Install the left side pushrods.
22. Install the left exhaust manifold.
23. Install the lower intake manifold.
24. Install the drive belt.
25. Fill the cooling system.