Timing Belt: Service and Repair

TIMING BELT

REMOVAL

1. To remove the engine mounting bracket, support the oil pan with a block of wood and jack until removal is completed.

2. Remove the power steering oil pump with the return hoses connected.





3. Remove the engine support bracket in the numbered sequence shown in the image.

NOTE: Slowly remove the reamer bolt. Keep in mind that the reamer bolt is sometimes heat seized on the engine support bracket. To make the installation easier, raise the engine as necessary.

4. Remove the crankshaft pulley from the crankshaft and the upper and lower timing belt covers.





5. Loosen the timing belt tensioner bolt and turn the timing belt tensioner counterclockwise along the elongated hole.





6. When the timing belt is to be reused, mark the direction of travel with an arrow before removing it.

INSPECTION

1. Closely inspect the belt. If problems are evident, as shown in images, replace the belt with a new one.





(1) Hardened back, or glossy surface rubber. The belt non-elastic and so hard that even if a finger nail is forced into it, no mark is produced.





(2) Cracked surface rubber.





(3) Side of belt badly worn.

NOTE: A belt in good condition should have clear-cut sides as if cut with a sharp knife.





(4) Badly worn teeth.

Initial stage: Canvas on the load side of the tooth flank worn (fluffy canvas fibers, rubber gone and color changed to white, unclear canvas texture).

Last stage: Canvas on the load side of the tooth flank worn down and rubber exposed (tooth width reduced).

(5) Missing tooth.





2. If backlash or an irregular noise is observed when rotating the pulley, replace the timing belt tensioner.

INSTALLATION

Timing belt tensioner and tensioner spring

1. Install the timing belt tensioner.





2. Attach the top of the tensioner spring on the water pump pin. Install the hook in the direction shown in the image.





3. Rotate the timing belt tensioner to the extreme counter clockwise along the elongated hole. Temporarily lock the timing belt tensioner in place.

Timing Belt





1. Align the timing marks of the camshaft sprockets (on the front and rear sides) and the crankshaft sprocket (at the top dead center position of the No. 1 cylinder compression stroke).

2. Route the timing belt on the crankshaft sprocket, then onto the rear camshaft sprocket.

3. Run the timing belt onto the water pump pulley, the front camshaft sprocket and the timing belt tensioner.

4. Apply force counterclockwise to the rear camshaft sprocket with tension on the right side of the belt, check that the timing marks are all aligned.

5. Install the flange.

6. Back off the fixing bolts of the temporarily tightened tensioner one or two turns and tighten the timing belt with the tensioner spring force specified.





7. Using the special tool (O9231-33100), turn the crankshaft two turns in the normal rotating direction (clockwise).

NOTE: Turn smoothly, only in a clockwise direction.

8. Re-adjust the sprocket timing marks and re-tighten the tensioner locking bolts.





9. Measure the belt tension with a belt tension gauge as shown in the image.

Tension force (New): 260 - 380 N (57 - 84 lbs).

CAUTION: Position the hooks in the tooth bottoms and apply the spindle to the back of the belt.





10. As the mounting bolts of the timing cover are different in size according to location, be sure to locate them according to the image.

Thread diameter x height:
"A" 6x60 mm (0.24 x 2.36 in.)
"B" 6x20 mm (0.24 x 0.79 in.)





11. Using the special tool (09231-33200, 09231-33300), install the crankshaft pulley on the crankshaft. Tighten the crankshaft pulley bolt to the specified torque. 150 - 160 Nm (1,500 - 1,600 kg) (108 - 116 ft lb).





12. As the mounting bolts of the engine support bracket are different in size according to location, install them in the recommended sequence, as shown in image.

NOTE: (1) When installing the reamer bolt, tighten it, slowly spraying lubricant on the reamer area. (2) To make the installation easier, raise the engine as necessary.

Thread diameter x height:
"1" "5" 10x53 mm (0.39 x 2.09 in)
"2" 12x56 mm (0.47 x 2.20 in)
"3" "4" 10x40 mm (0.39 x 1.57 in)