Inspection

INSPECTION

TIMING BELT

Replace the belt if any of the following conditions exist:





1. Hardening of rubber backing.
Back side should be glossy without resilience and leave no indent when pressed with fingernail.





2. Cracks on rubber back.
3. Cracks or peeling of canvas.
4. Cracks at bottom of ribs.
5. Cracks on belt sides.





6. Abnormal wear of belt sides. Normal wear is indicated if the sides are sharp as if cut by a knife. Abnormal wear is indicated if the sides are ragged.





7. Abnormal wear on teeth.
Initial stage:
Canvas worn (fluffy canvas fibers, rubbery texture gone, white discoloration, canvas texture indistinct)
Final stage:
Canvas worn, exposing rubber (tooth width reduced)
8. Missing tooth.

AIR BLEEDING METHOD





CAUTION:

- Always use the vertical press and put the auto-tensioner vertically.

- For breakage prevention, Do not apply the load of 5,000 N (1,124 pound) or more to the rod.

- Do not press the rod beyond Dimension "A" shown in the illustration.

1. Set the auto tensioner as shown in the illustration.
2. Press the rod slowly down to the lowest point "A" shown in the illustration.
3. Repeat the procedure 2 three times.
4. While the rod is projected at the point "B" shown in the illustration, push the rod with 100 - 200 N (22 - 44 pound). Check the enough stiffness. If the stiffness is not enough, replace the auto tensioner.
5. Press the rod slowly down. Put the pin through the hole and fix it.

CAUTION:
After the air bleeding operation has been completed, do not tilt the auto-tensioner to 60° or more from the right angle position.

VALVE CLEARANCE ADJUSTMENT

1. Remove the rocker cover and ignition coil.





2.
CAUTION:
Rotate the crankshaft clockwise at any time.

Turn the crankshaft clockwise, and align the crankshaft sprocket timing mark with the position shown in the illustration.





3. At that time, check the right and left camshaft sprocket timing marks are in position as shown in the illustration.





4. Measure the valve clearances marked with arrows shown in the illustration.
A: When Number1 cylinder is on the top dead center of compression stroke.
B: When Number4 cylinder is on the top dead center of compression stroke.
NOTE:
The valve clearance adjustment at the exhaust side is not necessary because the auto lash adjuster exists.





5. Using a thickness gauge, adjust the clearance between the valve stem end and the adjusting screw.
Standard value: 0.07 - 0.13 mm (0.003 - 0.005 inch)
6. Hold the adjusting screw not rotating through a driver and then tighten the rock nut.





7. Rotate the crankshaft one time clockwise and then align the timing mark with the timing mark on the crankshaft sprocket. (Place Number 4 cylinder on the top dead center of compression stroke.)
8. Adjust the valve clearance for the rest of the valves.
9. Install the rocker cover and ignition coil.