Corolla 2006-2007

Timing Chain & Sprockets


Removal & Installation

  1. Before servicing the vehicle, refer to the Precautions section.
  3. Drain the cooling system.
  5. Remove or disconnect the following:

    Negative battery cable
    Right engine cover
    Accessory drive belt and generator
    Power steering pump, without disconnecting the hoses.
    Right engine mount
    Cylinder head cover
    Turn the crankshaft so the No. 1 piston is at TDC on the compression stroke.
    Crankshaft pulley
    Crankshaft position sensor from the timing chain cover.
    Accessory drive belt tensioner.
    Right engine mounting bracket
    Chain tensioner
    Water pump
    Timing chain cover
    Crankshaft angle sensor plate
    Timing chain tensioner slipper
    Timing chain and crankshaft timing sprocket.
    Timing chain vibration damper
    Valve timing control assembly and camshaft timing sprocket

  7. Drive the seal from the cover.
  9. Pull the chain to its full length and measure the length of any 16 consecutive links. The length should not exceed 4.827 inches (122.6mm).
  11. Check the slipper and damper wear. Maximum wear should not exceed 0.039 in. (1mm).
  13. The tensioner plunger should move smoothly and lock into place with finger pressure.

To install:

  1. Apply engine oil from the tip of the intake camshaft, back to 16mm.
  3. Align the timing mark on the valve timing controller with the knock pin and gently push the valve timing controller onto the camshaft.
  5. Set the No.1 piston to TDC compression. The key on the crankshaft should be at 12 o-clock.
  7. Install or connect the following:

    Sprockets. Torque the bolt to 33 ft. lbs. (45 Nm). Turn the camshafts to align the point marks on the sprockets.
    Chain damper. Bolts: 96 inch lbs. (11 Nm).
    Timing chain and crankshaft sprocket. Be sure to align the yellow chain link with the mark on the crankshaft sprocket.
    Timing chain on the camshaft sprockets. Align the yellow links with the marks on the camshaft sprockets.
    Chain tensioner slipper. Bolt: 14 ft. lbs. (18.5 Nm).
    Crankshaft angle sensor plate with the F mark forward
    New seal in the front cover
    Silicone sealant to the timing chain cover as illustrated
    Timing chain cover

  9. Water pump. Tighten the 10mm bolts marked -C- to 80 inch lbs. (9 Nm), those marked -A- to 10 ft. lbs. (13 Nm), and the remaining 10mm bolts to 96 inch lbs. (11 Nm). Tighten the 12mm bolts to 14 ft. lbs. (18.5 Nm). Be sure to install the bolts in their original locations. Bolt lengths:
    1. A: 1.77 in. (45mm).
    3. B: 1.38 in. (35mm).
    5. C: 1.18 in. (30mm).
    7. D: 0.98 in. (25mm).

  11. With a Torx® wrench, tighten the stud bolt to 82 inch lbs. (9.3 Nm).
  13. Install or connect the following:

    Right engine mounting bracket. Bolts, with sealant applied: 35 ft. lbs. (47 Nm).
    Drive belt tensioner. Bolt: 51 ft. lbs. (69 Nm). Nut: 21 ft. lbs. (29 Nm).
    Crankshaft position sensor. Tighten to 80 inch lbs. (9 Nm).
    Crankshaft pulley. Bolt: 102 ft. lbs. (138 Nm).

  15. Release the ratchet pawl and compress the chain tensioner. Place the hook on the pin to keep the tensioner compressed.
  17. Install the tensioner, using a new O-ring. Torque the bolts to 80 inch lbs. (9 Nm).
  19. Turn the crankshaft counterclockwise and remove the hook from the pin. Turn the crankshaft clockwise and be sure the slipper is pushed by the plunger.
  21. Check the valve timing by turning the crankshaft clockwise until the mark of the pulley is aligned with the mark on the timing chain cover. The marks on the camshaft sprockets should be facing each other as shown.
  23. Install or connect the following:

    Silicone sealant to the 2 areas where the timing chain cover meets the cylinder head.
    Cylinder head cover. Bolts with washers in the sequence shown: 80 inch lbs. (9 Nm). Bolts without washers: 96 inch lbs. (11 Nm).
    Right engine mount. Bolts and nuts: 38 ft. lbs. (52 Nm).
    Power steering pump
    Alternator and drive belt
    Right engine undercover
    Negative battery cable
    Washer tank

  25. Fill the cooling system to the proper level.
  27. Start the vehicle, check for leaks and repair if necessary.

    Click image to see an enlarged view

    Fig. Timing chain link marks-1ZZ-FE and 2ZZ-GE engines