GM Corsica/Beretta 1988-1996 Repair Guide

Drive Belts

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All engines are equipped with a single (serpentine belt) to drive all engine accessories with the exception of the power steering pump on the 2.3L engine which is driven by a poly-groove belt. The poly-groove belt is not self adjusting and therefore may require service. The serpentine belt driven accessories are rigidly mounted with belt tension maintained by a spring loaded tensioner assembly. The belt tensioner has the ability to control belt tension over a fairly broad range of belt lengths. However, there are limits to the tensioner's ability to compensate for varying lengths of belts. Poor tension control and/or damage to the tensioner could result with the tensioner operating outside of its range.

INSPECTION



See Figures 1, 2, 3, 4 and 5

Inspect the belts for signs of glazing or cracking. A glazed belt will be perfectly smooth from slippage, while a good belt will have a slight texture of fabric visible. Cracks will usually start at the inner edge of the belt and run outward. All worn or damaged drive belts should be replaced immediately. It is best to replace all drive belts at one time, as a preventive maintenance measure, during this service operation.



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Fig. Fig. 1: There are typically 3 types of accessory drive belts found on vehicles today



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Fig. Fig. 2: An example of a healthy drive belt



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Fig. Fig. 3: Deep cracks in this belt will cause flex, building up heat that will eventually lead to belt failure



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Fig. Fig. 4: The cover of this belt is worn, exposing the critical reinforcing cords to excessive wear



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Fig. Fig. 5: Installing too wide a belt can result in serious belt wear and/or breakage

  1. If fraying of the belt is noticed, check to make sure both the belt and the tensioner assembly are properly aligned and that the belt edges are not in contact with the flanges of the tensioner pulley.
  2.  
  3. If, while adjusting belt tension, tensioner runs out of travel, the belt is stretched beyond adjustment and should be replaced.
  4.  
  5. If a whining is heard around the tensioner or idler assemblies, check for possible bearing failure.
  6.  

Routine inspection of the belt may reveal cracks in the belt ribs. These cracks will not impair belt performance and therefore should not be considered a problem requiring belt replacement. However, the belt should be replaced if belt slip occurs or if sections of the belt ribs are missing.

REMOVAL & INSTALLATION



Serpentine Belt
EXCEPT 3.1L (VIN M) ENGINE

See Figures 6, 7, 8 and 9

  1. If equipped, remove the belt guard.
  2.  
  3. Rotate the belt tensioner clockwise using a 15mm wrench for 2.0L and 2.2L engines. For 2.8L engines, use a 3 / 4 in. open end wrench to rotate the tensioner. On the 2.3L engine, a serpentine belt is used to drive the alternator and air conditioner compressor. To replace the belt push (rotate) the belt tensioner, using a 13 mm socket. For the 3.1L (VIN T) engine, use a 1 / 2 in. breaker bar to rotate the tensioner.
  4.  
  5. Slide the belt from the alternator pulley.
  6.  
  7. Release the tensioner, then remove the serpentine drive belt.
  8.  

To install:
  1. Properly route the serpentine drive belt, as shown in the accompanying figures.
  2.  
  3. Rotate the belt tensioner clockwise, using the proper sized wrench.
  4.  
  5. Slide the belt onto the alternator pulley
  6.  
  7. Release the belt tensioner.
  8.  
  9. If equipped, install the belt guard.
  10.  



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Fig. Fig. 6: Serpentine drive belt routing - 2.0L and 2.2L engines



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Fig. Fig. 7: Serpentine drive belt routing - 2.3L engine



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Fig. Fig. 8: Serpentine drive belt markings



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Fig. Fig. 9: Serpentine drive belt routing - 2.8L and 3.1L (VIN T) engines

3.1L (VIN M) ENGINE

See Figure 10 and 11



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Fig. Fig. 10: Serpentine drive belt routing and tensioner mounting - 3.1L (VIN M) engines

  1. Rotate the belt tensioner using tool J 39914, or equivalent serpentine drive belt tensioner wrench.
  2.  
  3. Remove the belt from the alternator pulley.
  4.  
  5. Carefully support the engine by the oil pan, using a block of wood and a suitable jack.
  6.  
  7. Remove the engine mount assembly from the engine mount bracket support.
  8.  
  9. Remove the auxiliary bracket.
  10.  
  11. Carefully lower the engine enough to remove the serpentine drive belt.
  12.  

To install:
  1. Rotate the belt tensioner using J 39914, or equivalent.
  2.  
  3. Install the serpentine drive belt, making sure it is properly routed.
  4.  
  5. Install the auxiliary bracket and fasteners. Tighten the fasteners to 12 ft. lbs. (50 Nm).
  6.  
  7. Install the engine mount assembly.
  8.  
  9. Remove the floor jack and block of wood supporting the oil pan.
  10.  



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Fig. Fig. 11: Most vehicles will have a belt routing label located in the engine compartment

Poly-Groove Belt

On the 2.3L 4 cyl. engine, the power steering pump is driven by a poly-groove belt and can be replace as follows:

  1. Loosen the pump bracket adjustment bolts.
  2.  
  3. Loosen the belt tension adjustment stud.
  4.  
  5. Remove the belt from the vehicle.
  6.  

To install:
  1. Place the belt into position.
  2.  
  3. Set the belt tension by turning the adjustment stud to the following:

    New belt - 191 lbs. (850 N)
     
    Used belt - 100 lbs. (450 N)
     

  4.  

If installing a new belt, set the belt tension to the new belt specification. Start the engine and run for a minimum of 2 minutes then readjust the belt to the used belt specification.

  1. Tighten the pump bracket bolts to 72 ft. lbs. (98 Nm) for the rear bolts and 19 ft. lbs. (26 Nm) for the front bolts.
  2.  

 
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