TIMING BELT
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Replace the belt if any of the following conditions exist:
- Hardening of rubber backing.
Back side should be glossy without resilience and leave no indent when pressed with fingernail.
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- Cracks on rubber back.
- Cracks or peeling of canvas.
- Cracks at bottom of ribs.
- Cracks on belt sides.
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- 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.
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- 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)
Canvas worn (fluffy canvas fibers, rubbery texture gone, white discoloration, canvas texture indistinct)
Final stage:
Canvas worn, exposing rubber (tooth width reduced)
- Missing tooth.
AUTO-TENSIONER
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- Check for oil leaks. If oil leaks are evident, replace the auto-tensioner.
- Check the rod end for wear or damage and replace the auto-tensioner if necessary.
- Measure the rod protrusion. If it is out of specification, replace the auto tensioner.
Standard value: 12 mm
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- Press the rod with a force of 98 to 196 N and measure the movement of the rod.
If the measured value is out of the standard value, replace the auto-tensioner.
Standard value: 1.0 mm or less
VALVE CLEARANCE ADJUSTMENT
Perform the adjustment of the valve clearance in the following procedure.- Remove the rocker cover.
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- Rotate crankshaft clockwise and then align the timing mark on the camshaft sprocket with the timing mark on the cylinder head. (Place No. 1 cylinder on the top dead center of compression stroke.)
CAUTION)
- Measure the valve clearance marked with arrows shown in the figure.
White arrow mark: When No.1 cylinder is on the top dead center of compression stroke.
Black arrow mark: When No.4 cylinder is on the top dead center of compression stroke.
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- Using a thickness gauge, adjust the clearance between the valve shaft end and the adjusting screw.
- Intake side: 0.11 mm
- Exhaust side: 0.20 mm
Standard value (in cold state):
NOTE: After the engine assembly is installed on the vehicle, check the valve clearance again
in the engine warm-up state. Adjust if necessary.
- Hold the adjusting screw not rotating through a driver and then tighten the rock nut.
- Rotate the crankshaft one time clockwise and then align the timing mark with the timing mark on the crankshaft sprocket. (Place No. 4 cylinder on the top dead center of compression stroke.)
- Adjust the valve clearance for the rest of the valves.
- Install the rocker cover.