GM Celebrity/Century/Ciera/6000 1982-1996 Repair Guide

Belts

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INSPECTION



Every 12 months or 15,000 miles (24,100 km) on gasoline engines or every 5000 miles (8000 km) on diesel engines, not dependent upon a period in months, check the drive belts for proper tension. Also look for signs of wear, fraying, separation, glazing and so on, and replace the belts as required.

ADJUSTMENT



See Figure 1

Belt tension should be checked with a gauge made for that purpose. If a gauge is not available, tension can be checked with moderate thumb pressure applied to the belt at its longest span midway between pulleys. If the belt has a free span less than 12 in. (305mm), it should deflect approximately 1 / 8 - 1 / 4 in. (3-6mm). If the span is longer than 12 in. (305mm), deflection can range between 1 / 8 in. (3mm) and 3 / 8 in. (10mm).



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Fig. Fig. 1: Checking a belt tension can be done with the use of your own thumb if a gauge is not available

Models with a serpentine belt are automatically adjusted by a spring loaded belt tensioner. Adjustments are not normally required.

  1. Loosen the driven accessory's pivot and mounting bolts.
  2.  
  3. Move the accessory toward or away from the engine until the tension is correct. You can use a wooden hammer handle as a lever, but do not use anything metallic.
  4.  
  5. Tighten the bolts and recheck the tension. If new bolts have been installed, run the engine for a few minutes, then recheck and readjust, as necessary.
  6.  

It is better to have belts too loose than too tight, because overtight belts will lead to bearing failure, particularly in the water pump and alternator. However, loose belts place an extremely high impact load on the driven component due to the whipping action of the belt.

REMOVAL & INSTALLATION



Except Serpentine Belt

It may be necessary to loosen more than one pulley or remove another belt to access the drive belt, such as the power steering and air conditioning.

  1. Loosen the driven accessory's pivot and mounting bolts.
  2.  
  3. Move the accessory toward or away from the engine until there is enough slack in the belt to slip it over the pulley of the driven accessory.
  4.  
  5. Remove the belt from the engine.
  6.  
  7. Install the new belt and move the accessory toward or away from the engine until the tension is correct. You can use a wooden hammer handle as a lever, but do not use anything metallic.
  8.  
  9. Adjust the belt tension, then tighten the bolts.
  10.  

Serpentine Belt
  1. Place a tool over the tensioner pulley axis bolt.
  2.  
  3. Rotate the tool counterclockwise to relieve belt tension.
  4.  
  5. Remove the drive belt.
  6.  
  7. Carefully release the tensioner pulley and remove the tool.
  8.  

To install:
  1. Route the belt over the pulleys, except tensioner.
  2.  
  3. Place tool over tensioner, rotate counterclockwise and install belt.
  4.  
  5. Remove the tool, then check alignment of tension and belt.
  6.  

 
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