Timing Belt: Service and Repair

TIMING BELT REMOVAL AND INSTALLATION

Pre-removal Operation
- Under cover removal





Removal Steps

NOTE: Refer to the above image for removal and installation service points.

REMOVAL SERVICE POINTS

(A) TIMING BELT REMOVAL





(1) Turn the crankshaft in the forward direction (to the right) to align the camshaft sprocket timing marks.

CAUTION: The crankshaft should always be turned in the forward direction only.





(2) Loosen the tension pulley center bolt.

(3) Move the tension pulley to the water pump side, and then remove the timing belt.

CAUTION: If the timing belt is to be reused, use chalk to mark (on its flat side) an arrow indicating the clockwise direction.

INSTALLATION SERVICE POINTS

(A) AUTO TENSIONER INSTALLATION





(1) Use a press or vise to gently compress the auto tensioner push rod until pin hole "A" of the push rod and pin hole "B" of the tensioner cylinder are aligned.

CAUTION: If the compression speed is too fast, the rod may become damaged, so be sure to carry out this operation slowly.





(2) Once the holes are aligned, insert the set pin.

NOTE: When replacing the auto tensioner with a new part, the pin will be in the auto tensioner.

(3) Install the auto tensioner to the engine.

(B) TIMING BELT INSTALLATION





(1) Align the timing marks on the camshaft sprocket. crankshaft sprocket and oil pump sprocket.





(2) After aligning the timing mark on the oil pump sprocket, remove the cylinder block plug and insert a Phillips screwdriver with a diameter of 8 mm (0.32 in), and check to be sure that the screwdriver goes in 60 mm (2.36 in) or more. If the screwdriver will only go in 20 - 25 mm (0.79 - 0.98 in) before striking the silent shaft, turn the sprocket once, realign the timing mark and check that the screwdriver goes in 60 mm (2.36 in) or more. The screwdriver should not be taken out until the timing belt is installed.

(3) Install the belt to the crankshaft sprocket, oil pump sprocket and camshaft sprocket in that order, so that there is no slackness in the belt tension.

CAUTION: If the timing belt is reused, install so that the arrow marked on it at time of removal is pointing in the clockwise direction.





(4) Set the tension pulley so that the pin holes are at the bottom, press the tension pulley lightly against the timing belt, and then provisionally tighten the timing belt.





(5) Screw the tool into the engine left support bracket until its end makes contact with tensioner arm. At that point, screw the tool in some more and then remove the set wire attached to the auto tensioner.

(6) Remove the tool.

(7) Tighten the center bolt to the specified torque.

Specified torque: 48 Nm (35 ft lb)

(8) Adjust the timing belt tension.

(C) TIMING BELT TENSION ADJUSTMENT

(1) After turning the crankshaft 1/4 of a revolution in the counter-clockwise direction, turn it in the clockwise direction until the timing marks are aligned.





(2) Loosen the tension pulley fixing bolt, and then use the special tool and a torque wrench to tighten the fixing bolt to the specified torque, as shown in image, while applying tension to the timing belt.

Timing belt tension torque:
Standard value: 3.5 Nm (2.6 ft lb)

CAUTION: When tightening the fixing bolt, make sure that the tension pulley does not turn with the bolt.





(3) Turn the crankshaft two revolutions in the clockwise direction so that the timing marks are aligned. After leaving it for 15 minutes, measure the amount of protrusion of the auto tensioner.

Standard value (A): 3.8 - 4.5 mm (0.150 - 0.177 in)

(4) If the amount of protrusion is outside the standard value, repeat the operation in steps (1) to (3).

(5) Check again to be sure that the timing marks of each sprocket are aligned.








(D) TIMING BELT FRONT LOWER COVER INSTALLATION
(D) TIMING BELT FRONT UPPER COVER INSTALLATION

TIMING BELT "B" REMOVAL AND INSTALLATION





Removal Steps

NOTE: Refer to the above image for removal and installation service points.

REMOVAL SERVICE POINTS

(A) CRANKSHAFT SPROCKET REMOVAL





(1) Use the special tool to remove the bolt.





(2) Use the special tool to remove the crankshaft sprocket.

(B) TIMING BELT "B" REMOVAL

CAUTION: If timing bell "B" is to be re-used, use chalk to mark it with an arrow on its flat side indicating the turning direction (to the right).

INSTALLATION SERVICE POINTS

(A) TIMING BELT "B" INSTALLATION, ADJUSTMENT

(1) Install timing belt "B" by the following procedure.





(a) Ensure that crankshaft sprocket "B" timing mark and the silent shaft sprocket timing mark are aligned.

(b) Fit timing belt "B" over crankshaft sprocket "B" and the silent shaft sprocket. Ensure that there is no slack in the belt.

(2) Adjust the tension of timing belt "B" by following procedure.





(a) Temporarily fix the timing belt "B" tensioner such that the center of the tensioner pulley is to the left and above the center of the installation bolt, and temporarily attach the tensioner pulley so that the flange is toward the front of the engine.





(b) Holding the timing belt "B" tensioner up with your finger in the direction of the arrow, as shown in image, place pressure on the timing belt so that the tension side of the belt is taut. Now tighten the bolt to fix the tensioner.

CAUTION: When tightening the bolt. ensure that the tensioner pulley shaft does not rotate with the bolt. Allowing it to rotate with the bolt can cause excessive tension on the belt.





(c) To ensure that the tension is correct, depress the belt (point "A," as shown in image) with a finger. If not, adjust.

Standard value: 5 - 7 mm (0.20 - 0.28 in)

(B) FLANGE INSTALLATION





NOTE: When installing, make sure the direction is correct, as shown in image.

(C) CRANKSHAFT SPROCKET INSTALLATION





Use the special tool to tighten the bolts to the specified torque.

Specified torque: 108 - 127 Nm (80 - 94 ft lb)

NOTE: Apply the minimum amount of engine oil to the bearing surface and thread of the crankshaft bolt.

Post-installation Operation
(1) Under Cover Installation
(2) Engine Adjustment