Timing Belt: Service and Repair

CAUTION:
a. Do not bend or twist timing belt too tightly.
b. After removing timing belt, do not rotate crankshaft and camshaft separately because valves will hit piston head.
c Ensure timing belt, timing belt camshaft sprocket, crankshaft sprocket and belt tensioner are clean and free from oil or water.
d. Before installing timing belt, confirm that No.1 cylinder is set at T.D.C. on compression stroke.
e. Align arrow on timing belt forward.
f. Align white lines on timing belt with punch mark on camshaft sprocket and crankshaft sprocket.
g. Adjust belt tension with all exhaust side spark plugs removed.




TIMING BELT COMPONENTS

REMOVAL
1. Place wheel chocks at both front and back of rear wheel.
2. Place safety stand under designated front supporting points.
3. Remove right front wheel.
4. Remove all spark plugs. (Exhaust side)
5. Remove dust cover and under cover.




6. Set No.1 cylinder at T.D.C. on its compression stroke.




7. Remove the following belts.
^ Power steering oil pump drive belt
^ Compressor drive belt
^ Alternator drive belt
8 Remove crankshaft pulley.




9. Support engine with a hoist or chain block. Remove right side engine mounting insulator and engine mounting bracket.




10. Remove front upper and lower belt covers.




11. Loosen timing belt tensioner bolts (A) and (B) and return spring then remove timing belt.







Visually check the condition of the timing belt. Replace if any abnormality is found.

BELT TENSIONER AND RETURN SPRING




1. Visually check belt tensioner for seizure, rust and any evidence of breaks.
2. Confirm that tensioner pulley can be rotated smoothly.
3. Visually check return spring for corrosion, distortion and any abnormal signs.

INSTALLATION




1. Confirm that No. 1 cylinder is set at T.D.C. on its compression stroke.




2. Install tensioner and return spring.
Temporarily tighten bolts so that tensioner can swing smoothly.

Cam And Crank Timing Marks:

3. Set timing belt.
a. Ensure that timing belt and pulleys are clean and free from oil or water. Do not bend timing belt tightly.
b. Align white lines on timing belt with punch marks on camshaft sprocket and crankshaft sprocket.
c. Have arrow on timing belt pointing toward front belt covers.




4. Tighten belt tensioner and assemble spring.
To set spring, first hook one end on bolt (B) side, then hook the other end on tensioner bracket pawl. After rotating crankshaft two turns clockwise, tighten bolt (B) and then bolt (A) and belt tension will automatically be the specified value.
15 - 20 Nm (11 - 14 ft-lb)

5. Install timing belt covers.