Workshop Manual
MAINTENANCE 2–7
COOLING SYSTEM
Cooling Fan Drive Belt
Adjustment
1. Check the cooling fan drive belt for cracking and
other damage.
2. Check the drive belt tension by exerting a force of
98N (10kgf/22lb) midway between the fan pulley 2
and the alternator 3.
3. Adjust the belt tension by loosening the alternator
mounting bolt and the alternator adjusting bolt and
pivoting the alternator.
Be sure to retighten the bolts after adjusting the belt
tension.
mm (in)
Depress here
98N (10kgf/22lb)
Deflection
2
1
3
Thermostat
Inspection
Visually inspect the thermostat.
Replace the thermostat if excessive wear or damage is
discovered during inspection.
Measure the valve lift.
mm (in)
°C(°F)
Agitating rod
Thremometer
Wood piece
VALVE CLEARANCE AND ADJUSTMENT
Note:
The cylinder head bolts were previously tightened with
the "Angular Tightening Method". Therefore, it is not
necessary to retighten the cylinder head bolts before
adjusting the valve clearance.
Amount of Valve Lift
at 95°C (203°F)
10.0 (0.39)
Valve Opening
Temperature
80–84 (176–183)
4BG1 6BG1
Cooling Fan Drive 8.0–12.0 7.0–10.0
Belt Deflection (0.3–0.47) (0.28–0.39)