Timing Procedure

NOTE: You must retime the camshafts when either camshaft timing is disturbed.

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Disconnect the negative battery cable.
3. Drain the cooling system.
4. Remove the valve covers.
5. Remove the intake manifold.
6. Remove the fuel supply manifold.
7. Remove the serpentine drive belt.
8. Remove the thermostat housing.
9. Remove the roller followers.

   NOTE: You must retime the left and right camshafts when either one is disturbed.

10. Turn the crankshaft clockwise to position number one cylinder at top dead center (TDC).
11. Install the crankshaft TDC timing tool (303-573) to hold the crankshaft in position. The special tool must be installed so that it contacts the engine block.

    Use the special tool to position the engine at TDC

    CAUTION
    The right-hand camshaft sprocket retaining bolt uses a left-hand thread.

12. Loosen, but do not remove the right-hand camshaft sprocket bolt with the torque wrench extension (303-575).

    Using the special tool and the camshaft sprocket nut socket, loosen the sprocket bolt

    NOTE: The camshaft timing slots are off-center.

13. Position the camshaft timing slots below the centerline of the camshaft.
14. Install camshaft holding tool (303-577) and the adapter (303-576) on the front of the right-hand cylinder head.

    Install the camshaft holding tool on the front of the right-hand cylinder head

15. Raise and support the vehicle.
16. Remove the right, front wheel and tire.
17. Remove the lower splash shield.
18. Remove the right-hand camshaft tensioner.

    Remove the right-hand camshaft tensioner

    NOTE: Do not tighten the two clamp bolts. Leave the top two special tool clamp bolts loose.

19. Lower the vehicle.
20. Install the camshaft sprocket holding tool (303-564) and the adapter (303-578) on the rear of the right-hand cylinder head.

    Install the camshaft sprocket holding tool on the rear of the right-hand cylinder head

21. Install the timing chain tensioner tool (303-571) from where the camshaft tensioner was removed.

    Install the timing chain tensioner tool from where the camshaft tensioner was removed

    CAUTION
    The right-hand camshaft sprocket bolt is a left-hand threaded bolt.

22. With the right-hand camshaft positioned torque the camshaft gear removal tool (303-575) top two clamp bolts to 89 in-lb (10 Nm). Tighten the camshaft bolt using the torque wrench adapter and torque the camshaft bolt to 45 ft-lb (61 Nm).

    Use the camshaft gear removal tool (303-575)

23. Remove the timing chain tensioner tool.
24. Install the right-hand camshaft tensioner.
    • Torque to 32 ft. lbs (44 Nm).
25. Raise the vehicle.
26. Install the right-hand lower splash shield.
27. Install the right, front wheel and tire.
28. Lower the vehicle.
29. Remove all installed special tools from the right-hand cylinder head.
30. Remove the left-hand camshaft tensioner.
31. Install the camshaft sprocket holding tool (303-564) and adapter for tool 303-564 (303-578) on the front of the left-hand cylinder head.
    • Torque the top two clamp bolts to 89 in-lb (10 Nm).

    Install the camshaft sprocket holding tool and adapter on the front of the left cylinder head

32. Loosen the left-hand camshaft sprocket bolt.
33. Loosen the two clamping bolts on the camshaft sprocket holding tool so that the camshaft sprocket rotates freely.

    NOTE: The camshaft timing slots are off-center.

34. Position the camshaft timing slots below the centerline of the camshaft.
35. Install the camshaft holding tool (303-577) and adapter for tool 303-577 (303-576) on the rear of the left-hand cylinder head.

    Install the camshaft holding tool and adapter

36. Install the timing chain tensioner (303-571) from where the camshaft tensioner was removed.
    • Torque the top two clamp bolts to 89 in-lb (10 Nm).
    • Torque the camshaft bolt to 63 ft-lb (85 Nm).
37. Remove the timing chain tensioner.
38. Install the LH camshaft tensioner.
    • Torque to 32 ft-lb (44 Nm).
39. Remove all of the special tools from the left-hand cylinder head and camshaft.
40. Install the roller followers.
41. Install the thermostat housing.
42. Install the serpentine drive belt.
43. Install the fuel supply manifold.
44. Install the lower intake manifold.
45. Install the valve covers.
46. Refill the cooling system.
47. Start the engine and check for leaks. Repair as necessary.