Toyota Celica 1986-1993 Repair Guide

Belts

Print

The accessory drive belts, which drive engine accessories such as the alternator, air pump, power steering pump, air conditioning compressor and water pump, are of either the V-belt design or flat, serpentine design. The V-belts show wear and damage readily, since their basic design was a belt with a rubber casing. As the casing wore, cracks and fibers were readily apparent. Newer design, multi-ribbed serpentine belts do not show wear as readily, and an untrained eye may not distinguish between a good, serviceable belt and one that is worn to the point of failure. It is sound maintenance practice to visually inspect the belts regularly and replace them, as required. It's not a bad idea to replace all drive belts at 60,000 miles (96,000 km) regardless of their condition, since a tow bill could cost more than all the belts combined.

INSPECTION





Click image to see an enlarged view

Fig. Fig. 1 Loosening the alternator pivot bolt



Click image to see an enlarged view

Fig. Fig. 2 Loosening the alternator belt tensioning bolt5S-fe engine shown



Click image to see an enlarged view

Fig. Fig. 3 Removing the air conditioning compressor belt can sometimes be difficult when it is located beneath other components



Click image to see an enlarged view

Fig. Fig. 4 Removing the power steering drive belt3S-gte engine shown



Click image to see an enlarged view

Fig. Fig. 5 Removing the air conditioning drive belt and idler pulley4A-fe engine shown

Inspect V-belts for signs of cracking, oil soaking, dryness, fraying, or other wear or damage. If there is an oil leak, the leak should be stopped so that the replacement does not suffer the same failure. Also, make sure that the belts are operating at the correct angle meaning the pulleys are in line, since a belt that is operating cock-eyed will soon fail.

Visually inspect the serpentine belt for the following: separation of the adhesive rubber above and below the core, core separation from the belt side, a severed core, separation of the rib from the adhesive rubber, cracking or separation of the ribs; tears, wear or cracks in the inner ridges of the ribs.



Click image to see an enlarged view

Fig. Fig. 6 Removing the alternator drive belt4A-fe engine shown



Click image to see an enlarged view

Fig. Fig. 7 Removing the alternator drive belt5S-fe engine shown



Click image to see an enlarged view

Fig. Fig. 8 Checking the drive belt condition, tension and proper installation

ADJUSTMENT



Belts are normally adjusted by loosening the bolts of the accessory being driven and moving that accessory on its pivot points until the proper tension is applied to the belt. The accessory is held in this position while the bolts are tightened. To determine proper belt tension, you can purchase a belt tension gauge or simply use the deflection method. To determine deflection, press inward on the belt at the mid-point of its longest straight run. The belt should deflect (move inward) 3 / 8 - 1 / 2 in. (10-13mm). Some long V-belts and most serpentine belts have idler pulleys which are used for adjusting purposes. Just loosen the idler pulley and move it to take up or release tension on the belt.


WARNING
Proper belt tension is important because it will allow the belt to run quietly and will maximize the belt's service life.

Alternator

On early engines, to adjust the tension of the alternator drive belt, loosen the pivot and mounting bolts on the alternator. Using a prybar or even your hand if you're strong enough, move the alternator one way or the other until the tension is within acceptable limits.


WARNING
Use extreme care when using a prybar as a lever when adjusting the alternator belt tension, since the component pried against can be damaged or the belt can be overstretched and damaged.

Tighten the mounting bolts securely. If a new belt has been installed, always recheck the tension after a few miles of driving.

Alternator belt tension on all other engines is adjusted by means of a tension adjusting bolt. Loosen the alternator pivot bolt and the locking bolt, then turn the tension adjusting bolt until proper tension is achieved.

Tighten the mounting bolts securely. If a new belt has been installed, always recheck the tension after a few miles of driving.

Air Conditioning Compressor

Tension on the air conditioning compressor belt is adjusted by means of an idler pulley. Loosen the lockbolt and then turn the adjusting bolt on the idler pulley until the desired tension is achieved. Retighten the idler pulley lockbolt. Tighten the lockbolt securely. If a new belt has been installed, always recheck the tension after a few hundred miles of driving.

Power Steering Pump

On some models, tension on the power steering pump belt is adjusted by means of an idler pulley. Loosen the lockbolt and then turn the adjusting bolt on the idler pulley until the desired tension is achieved. Retighten the idler pulley lockbolt. Tighten the lockbolt securely. If a new belt has been installed, always recheck the tension after a few hundred miles of driving.

Power steering pump belt tension on other models is adjusted by means of a tension adjusting bolt. Loosen the power steering pump pivot bolt and then turn the tension adjusting bolt until proper tension is achieved.

Tighten the mounting bolts securely. If a new belt has been installed, always recheck the tension after a few hundred miles of driving.

REMOVAL & INSTALLATION



  1. Loosen the accessory being driven and move it on its pivot point to free the belt.
  2.  
  3. Remove the belt. If an idler pulley is used, it is often only necessary to loosen the idler pulley to provide enough slack to remove the belt.
  4.  
  5. After the new belt is in place and properly tensioned, start the engine and allow it to run for about five minutes to seat the new belt(s)
  6.  
  7. Stop the engine and recheck the belt tension. Adjust as necessary.
  8.  


WARNING
It is important to note that on engines with many driven accessories, several or all of the belts may have to be removed to get at the one to be replaced. Tighten the inner belts before the outer ones in such cases.

 
label.common.footer.alt.autozoneLogo