Timing Chain: Service and Repair
REMOVAL PROCEDURECAUTION: Refer to Battery Disconnect Caution in Service Precautions.
1. Disconnect the negative battery cable.
2. Drain the cooling system.
3. Remove the windshield washer fluid reservoir mounting bolt.
4. Disconnect the windshield washer pump connector.
5. Disconnect the windshield washer pump fluid line.
6. Plug the pump outlet
7. Remove the windshield washer fluid reservoir.
8. Remove the accessory drive belt.
9. Remove the generator from the engine.
10. Install the engine support fixture.
11. Remove the following fasteners from the right side engine mount:
- The two nuts (3)
- The four bolts (1)
12. Loosen the A/C receiver pinch clamp.
13. Lift the A/C receiver in order to access the right side engine mount.
14. Remove the right side engine mount.
15. Remove the cylinder head cover.
16. Set the number one piston to the top dead center position.
17. Align the camshaft timing sprockets.
18. Disconnect the power steering oil pressure switch connector.
19. Raise and properly support the vehicle.
20. Remove the right side lower engine splash shield.
21. Remove the two power steering pump through bolts and the nuts (1).
22. Remove the power steering pump from the mounting surface. Move the pump to the side.
23. Remove the one crankshaft pulley bolt.
24. Remove the crankshaft pulley.
25. Remove the following components:
- The crankshaft position sensor bolt (5)
- The sensor
26. Lower the vehicle.
27. Remove the following components from the mounting surface:
- The drive belt tensioner bolt
- The drive belt tensioner nut
- The drive belt tensioner
28. Remove the timing chain tensioner bolts (1, 2).
29. Remove the timing chain tensioner.
30. Remove the following fasteners:
- The timing chain cover bolts (1-14)
- The timing chain cover nut (15)
31. Remove the timing chain cover.
32. Remove the crankshaft sensor reluctor (1).
33. Remove the following components:
- The timing chain dampener bolt (1)
- The timing chain dampener
- The timing chain shoe bolts (2)
- The timing chain shoe
34. Remove the following components:
- The crankshaft sprocket
- The timing chain
INSTALLATION PROCEDURE
1. Use a wrench in order to align the camshaft timing marks.
Be sure to place the wrench on the hexagonal portion of the camshafts.
2. Turn the camshafts in order to align the timing marks.
3. Temporarily install the crankshaft bolt.
4. Turn the crankshaft until the crankshaft keyway (1) faces upward.
5. Install the following components:
- The timing chain (2)
- The crankshaft timing sprocket
NOTICE: Refer to Fastener Notice in Service Precautions.
6. Install the timing chain shoe. Secure the timing chain shoe using two bolts (1, 2).
- Tighten the timing chain shoe bolts to 10 Nm (89 inch lbs.).
7. Install the timing chain (1) onto the camshafts timing sprockets (3).
Ensure that the timing chain links are aligned with the timing marks.
8. Install the timing chain dampener. Secure the timing chain dampener using one bolt (1).
- Tighten the timing chain slipper bolt to 18 Nm (14 ft. lbs.).
9. Install the crankshaft sensor reluctor (1) onto the crankshaft.
Insure that the F on the reluctor is facing outward.
10. Apply a continuous bead of GM P/N 12346240 or an equivalent to the timing chain cover mating surface.
11. Install the timing chain cover. Use the following fasteners in order to secure the cover:
- Fifteen bolts (1-14)
- One nut (15)
- Tighten the timing chain cover nut and bolts (10 mm head) to 10 Nm (89 inch lbs.).
- Tighten the timing chain cover nut and bolts (12 mm head) to 18 Nm (14 ft. lbs.).
12. Use the following steps in order to install the timing chain tensioner:
12.1. Fully depress the plunger (4).
12.2. Apply the hook (2) to the pin (3).
12.3. Install the timing chain tensioner.
13. Install the timing chain tensioner. Secure the timing chain tensioner using two bolts (1).
- Tighten the timing chain tensioner bolts to 10 Nm (89 inch lbs.).
14. Install the right side engine mounting bracket. Secure the bracket using three bolts.
- Tighten the engine mounting bracket bolts to 54 Nm (40 ft. lbs.).
15. Install the drive belt tensioner. Secure the tensioner using one bolt and one nut.
- Tighten the bolt to 69 Nm (51 ft. lbs.).
- Tighten the nut to 29 Nm (21 ft. lbs.).
16. Raise the vehicle. Support the vehicle.
17. Install the crankshaft position sensor. Secure the sensor using one bolt (5).
- Tighten the crankshaft position sensor bolt to 12 Nm (106 inch lbs.).
18. Install the crankshaft pulley. Secure the crankshaft pulley using one bolt.
- Tighten the crankshaft pulley to 142 Nm (105 ft. lbs.).
19. Install the power steering pump.
20. Use the following fasteners in order to secure the power steering pump:
- Two bolts (1)
- Two nuts
- Tighten the power steering pump bolts to 43 Nm (32 ft. lbs.).
21. Install the right side lower engine splash shield.
22. Lower the vehicle.
23. Connect the power steering oil pressure switch connector.
24. Rotate the crankshaft clockwise one revolution.
Ensure that the plunger on the timing chain tensioner has released.
Complete the following steps if the plunger does not release:
- Use a screwdriver or your finger in order to press the timing chain dampener into the timing chain tensioner.
- Release the hook from the pin.
- Verify proper timing chain alignment after the plunger has released.
25. Install the cylinder head cover.
26. Install the right side engine mount.
27. Use the following fasteners in order to secure the mount:
- Three bolts (1)
- Two nuts (3)
- Tighten the right side engine mount bolts (1, 2, 4) to 54 Nm (40 ft. lbs.).
- Tighten the right side engine insulator nuts (3) to 54 Nm (40 ft. lbs.).
28. Lower the A/C receiver. Tighten the pinch clamp.
29. Remove the engine support fixture.
30. Install the generator.
31. Remove the plug from the windshield washer reservoir.
32. Connect the windshield washer fluid line.
33. Connect the windshield washer pump connector.
34. Install the windshield washer reservoir. Secure the reservoir using one bolt.
35. Fill the cooling system.
36. Connect the negative battery cable.