Drive Belt: Service and Repair

COOLING FAN, V-BELT AND WATER PUMP







CAUTION:
- The automatic cooling fan coupling and the water pump cannot be disassembled. It must be replaced if defective.
- Make sure that there is no oil or grease on the V-belts. V-belts soiled with oil or grease may easily slip, resulting in deteriorated performance of the cooling system.

Service standards (Unit: mm {in.})







Tightening torque (Unit: N.m {ft.lbs, kgf.m})







Special tools







Inspection and cleaning procedure







Inspection: Automatic cooling fan coupling
- Make an inspection of the following points. Replace the automatic cooling fan coupling if defective. Check that:
- the hydraulic oil sealed inside the coupling is not leaking;
- the coupling does not make any abnormal noise or rotate unevenly due to defects in the inside bearing when rotated manually; and
- the automatic cooling fan coupling does not move too much when pushed and pulled in the axial directions when the engine is cold.







Cleaning: Automatic cooling fan coupling
- When removing foreign matter from the bimetal, be careful not to press too hard against the bimetal.







Inspection: Tension of V-belts
- Press each V-belt at a central portion between pulleys with a force of approximately 98 N {22 lbs, 10 kgf} as shown in the illustration and measure the amount of deflection of the belt.
A: Alternator pulley
B: Air conditioner compressor pulley or tension pulley
C: Fan pulley
D: Water pump pulley

















- Measure the amount of deflection of the V-belt.
- If the measured value deviates from the standard value range, adjust the tension of the belt as follows.

Adjustment of V-belt







1. Vehicles with air conditioner
- Loosen the alternator mounting nuts (2 locations) and adjust the tension of the V-belt by tightening or loosening the adjustment bolt.
- After the adjustment is completed, retighten the mounting nuts firmly.

CAUTION: Excessive tension in the V-belt may damage not only the belt itself but also the bearings of the related components.







2. Vehicles without air conditioner
- Loosen the tension pulley mounting sleeve and turn in or out the adjustment bolt to adjust the tension of the V-belt.
- After the adjustment is completed, retighten the mounting sleeve firmly.

CAUTION: Excessive tension in the V-belt may damage not only the belt itself but also the bearings of the related components.