GM Lumina/Grand Prix/Cutlass Supreme/Regal 1988-1996

Belts

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INSPECTION



See Figures 1 through 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.

Once a year or at 12,000 miles (19,200km), the tension and condition of the drive belts should be checked, and, if necessary, adjusted. Loose accessory drive belts can lead to poor engine cooling and diminish alternator, power steering pump, air conditioning compressor or air pump output. A belt that is too tight places a severe strain on the water pump, alternator, power steering pump, compressor or air pump bearings. Inspection of the belt may reveal cracks in the belt ribs. The cracks will not impair belt performance and should not considered a problem requiring belt replacement. Belts should be replaced if sections of the belt ribs are missing or if the belt is outside the tensioners operating range. The material used in late-model drive belts is such that the belts do not show wear. Replace belts at least every three years.

A single serpentine belt is used to drive all engine accessories formerly driven by multiple drive belts. The accessories are rigidly mounted with the belt tension maintained automatically by a spring loaded tensioner (all engines except 2.8L and 3.1L engines with manual transaxles). The manual transaxle engines use a separate belt to drive the air pump.

The 2.3L QUAD 4 engine uses two drive belts, one to drive the power steering pump and the second to drive the A/C compressor and alternator. The power steering belt is not self-adjusting and has to be adjusted manually. The A/C and alternator belt is automatically adjusted by a spring loaded belt tensioner, requiring no periodic adjustment. QUAD 4 engine without air conditioning has an idler pulley in place of the compressor, consequently the A/C and non-A/C belts are the same.



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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

TENSION MEASUREMENT



Vehicles Through 1992
  1. Run the engine with all of the accessories OFF for until the engine is warmed up. Shut the engine OFF . Using a belt tension gauge No. J 23600-B or equivalent, placed halfway between the alternator and power steering pump, measure the belt tension. Note the reading.
  2.  
  3. With the accessories OFF, start the engine and allow to stabilize for 15 seconds. Turn the engine OFF . Using a 15mm socket or 1 / 2 in. breaker bar, apply clockwise force to the tensioner pulley bolt. Release the tension and record the tension.
  4.  
  5. Using the 15mm socket or breaker bar, apply counterclockwise force to the tensioner pulley bolt and raise the pulley to eliminate all tension. Slowly lower the pulley to the belt and take a tension reading without disturbing the belt tensioner position.
  6.  
  7. Average the three readings. If the average is not between 50-70 lbs.(225-315 N) and the belt is within the tensioner's operating range, replace the belt.
  8.  

1993-1996 Vehicles
  1. Run the engine for 10 minutes.
  2.  
  3. Shut the engine OFF , then check the belt tension between any two pulleys using J 23600-B or equivalent belt tension gauge. Note the tension.
  4.  
  5. Start and run the engine for 30 seconds, then shut the engine OFF and check the belt tension between any two pulleys using the belt tension gauge. Note the tension.
  6.  
  7. Start and run the engine for 30 seconds, then shut the engine OFF and check the belt tension between any two pulleys using the belt tension gauge. Note the tension.
  8.  
  9. The belt tension is the average of the three readings taken. The tension should fall within the folowing specifications:

    1993-94 Vehicles: 105-125 lbs. (467-556 N)
     
    1995 Vehicles: 55-75 lbs. (245-356 N)
     
    1996 Vehicles: 30-50 lbs. (133-222 N)
     

  10.  
  11. Replace the drive belt tensioner if the belt tension is below the minimum specified and if the drive belt tensioner is within its operating range.
  12.  

ADJUSTMENT



Belt tension is maintained by the automatic tensioner and is NOT adjustable except on the following:

2.8l and 3.1l Air Pump Belts
  1. Loosen the air pump mounting bolts.
  2.  
  3. Using a suitable prybar, move the air pump until the belt deflection at the center of the longest span of the belt is about / 4 inch (6mm). Be careful not to damage the aluminum pump housing.
  4.  
  5. Tighten the air pump bolts.
  6.  

2.3L Power Steering Belt
  1. Place a belt tension gauge J36018 or equivalent onto the pump belt.
  2.  
  3. Loosen the two pump-to-rear bracket adjustment bolts.
  4.  
  5. Tighten the engine-to-front bracket bolts to 44 inch lbs. (5 Nm).
  6.  
  7. For the 2.3L (VIN D) engine, use a inch drive handle in the tab to move the pump to the proper adjustment lbs.
  8.  
  9. For the 2.3L (VIN A) engine, tighten the adjustment stud to the proper adjustment.
  10.  
  11. Adjust to 110 lbs.
  12.  
  13. Tighten the pump adjusting bolts.
  14.  

REMOVAL & INSTALLATION



2.8L and 3.1L Air Pump Belt
  1. Disconnect the negative battery cable.
  2.  
  3. Loosen the air pump.
  4.  
  5. Remove the worn belt.
  6.  

To install:
  1. Wrap the new belt around the pump.
  2.  
  3. Adjust the belt to specifications and tighten the pump mounting bolts.
  4.  
  5. Connect the negative battery cable.
  6.  

2.3L Power Steering Belt
  1. Disconnect the negative battery cable.
  2.  
  3. Loosen the adjustment bolts.
  4.  
  5. Remove the power steering belt from the pulley.
  6.  

To install:
  1. Route the belt around the pulley.
  2.  
  3. Adjust the belt to specifications, then tighten the adjustment bolts.
  4.  
  5. Connect the negative battery cable.
  6.  

See Figures 6 through 15

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Fig. Fig. 6: Unfasten the retaining bolts...



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Fig. Fig. 7: ... then remove the serpentine belt guard



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Fig. Fig. 8: ...



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Fig. Fig. 9: ... then remove the serpentine belt

  1. Remove the belt. Clean the accessory drive belt surfaces.
  2.  



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Fig. Fig. 10: Serpentine drive belt routing-2.2L engine



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Fig. Fig. 11: Removal and installation of the serpentine belt-2.3L engine



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Fig. Fig. 12: Serpentine belt routing-2.5L engine with and without A/C



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Fig. Fig. 13: Use an 18mm box end wrench on the pulley nut to rotate the tensioner on the 3.8L engine



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Fig. Fig. 14: in. breaker bar to rotate the tensioner



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Fig. Fig. 15: On the 3.4L, use a box end wrench, then rotate the tensioner clockwise and remove the serpentine belt

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the belt guard or coolant recovery reservoir as required.
  4.  


CAUTION
To avoid personal injury when rotating the serpentine belt tensioner, use a tight fitting wrench that is at least 24 in. (61cm) long.

  1. Take note of the belt's routing. Lift or rotate the tensioner using a suitable sized breaker bar in the square opening or box end wrench on the pulley nut. Loosen the pump-to-engine bracket bolts and adjusting stud to remove the power steering pump belt on the 2.3L QUAD 4 engines.
  2.  

To install:

Be sure the belt is aligned into the proper grooves of the accessory drive pulleys.

  1. Lift the tensioner, and install the belt onto pulleys. Make sure the belt is routed properly.
  2.  
  3. Install the belt guard or reservoir.
  4.  

 
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