Mitsubishi Eclipse 1990-1998 Repair Guide

Belts

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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

1990-94 Vehicles

See Figures 6 and 7

Check the drive belts for cracks, fraying, wear and proper tension every 6,000 miles. It is recommended that the belts be replaced every 24 months or 24,000 miles.

  1. Place a straight-edge along the top edge of the belt and across 2 pulleys. Allow both ends of the straight-edge to rest on top of each pulley for support.
  2.  



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Fig. Fig. 6: Measuring the drive belt deflection using the straight edge method



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Fig. Fig. 7: Use a suitable tension gauge to check for correct belt tension

  1. Measure the deflection of the belt from the straight-edge with a force of about 22 lbs. (100 N) applied midway between the 2 pulleys. Deflection should measure as follows:
  2.  

Air Conditioning Compressor Drive Belt



1.8L engine-0.160-0.200 in. (4.0-5.0mm)
 
2.0L engine-0.180-0.200 in. (4.5-5.0mm)
 

Alternator/Water Pump Drive Belt



1.8L engine-0.315-0.433 in. (8.0-11.0mm)
 
2.0L engine-0.354-0.453 in. (9.0-11.5mm)
 

  1. Belt tension can also be checked with a tension gauge. Measure the belt tension between any 2 pulleys. The desired value should be 55-110 lbs. (250-500 N).
  2.  

1995-98 Vehicles

See Figures 8, 9, 10 and 11

  1. Place a straight-edge along the top edge of the belt and across 2 pulleys. Allow both ends of the straight-edge to rest on top of each pulley for support.
  2.  
  3. Measure the deflection of the belt from the straight-edge with a force of about 22 lbs. (100 N) applied midway between the 2 pulleys. Deflection should measure as follows:
  4.  



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Fig. Fig. 8: Use a force of about 22 lbs. to measure belt deflection-1995-98 2.0L non-turbo engines



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Fig. Fig. 9: You can also measure belt tension with a proper gauge

Alternator/Water Pump Drive Belt



2.0L non-turbo engine-0.35-0.47 in. (9.0-12.0mm)
 
2.0L turbo and 2.4L engines-0.35-0.45 in. (9.0-11.5mm)
 

Power Steering Pump Drive Belt



2.0L non-turbo engine-0.39-0.43 in. (10.0-11.0mm)
 
2.0L turbo and 2.4L engines-0.22-0.32 in. (5.5-8.0mm)
 



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Fig. Fig. 10: Checking deflection of the power steering pump drive belt-1995-98 2.0L non-turbo engines



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Fig. Fig. 11: Checking deflection of the power steering pump drive belt-1995-98 2.0L turbo and 2.4L engines

  1. Belt tension can also be checked with a tension gauge. Measure the belt tension between any 2 pulleys. The desired tension value should be as follows:
  2.  

Alternator/Water Pump Drive Belt



2.0L non-turbo engine-90-110 lbs. (400-490 N)
 
2.0L turbo and 2.4L engines-55.1-110.2 (245-490 N)
 

Power Steering Pump Drive Belt



2.0L non-turbo engine-92.6-114.6 lbs. (412-510mm)
 
2.0L turbo and 2.4L engines-55.1-110.2 lbs. (245-490 N)
 

ADJUSTMENT



See Figures 12, 13, 14 and 15

Excessive belt tension will cause damage to the alternator and water pump pulley bearings, while, on the other hand, loose belt tension will produce slip and premature wear on the belt. Therefore, be sure to adjust the belt tension to the proper level.

To adjust the tension on a drive belt, loosen the adjusting bolt or fixing bolt locknut on the alternator, alternator bracket or tension pulley. Then move the alternator or turn the adjusting bolt to adjust belt tension. Once the desired value is reached, secure the bolt or locknut and recheck tension.



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Fig. Fig. 12: Air conditioner compressor drive belt adjustment components



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Fig. Fig. 13: Alternator assembly pivot and brace bolt location-1.8L engine shown



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Fig. Fig. 14: Increasing the belt tension using prybar to apply pressure at stator part of alternator



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Fig. Fig. 15: Alternator mounting and adjustment fasteners-2.0L engine shown

REMOVAL & INSTALLATION



See Figures 16 through 28

  1. Disconnect the negative battery cable.
  2.  
  3. Loosen the adjusting bolt or fixing bolt locknut on the alternator, alternator bracket or tension pulley.
  4.  



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Fig. Fig. 16: Remove the power steering and A/C compressor lock bolt



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Fig. Fig. 17: Loosen the power steering and A/C compressor adjusting screw ...



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Fig. Fig. 18: ... then slide the drive belt off the pulleys



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Fig. Fig. 19: Remove the power steering pump and A/C compressor belt from the vehicle

  1. Move the alternator or turn the adjusting bolt to release the belt tension.
  2.  



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Fig. Fig. 20: For access to the alternator drive belt, unfasten the under cover side panel retaining bolts



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Fig. Fig. 21: Remove undercover side panel screws



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Fig. Fig. 22: Remove the under cover side panel trim retainers ...



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Fig. Fig. 23: ... then pull the side panel from the wheel well



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Fig. Fig. 24: Loosen the alternator adjusting bolt



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Fig. Fig. 25: Remove the alternator upper mounting bolt



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Fig. Fig. 26: Remove the alternator bracket side mounting bolt



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Fig. Fig. 27: Once the necessary bolts are loosened, you can slide the alternator belt off the pulley ...



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Fig. Fig. 28: ... then pull the alternator belt up, and out of the vehicle

  1. Take note of the exact routing of the belt prior to removal. Lift the drive belt from the pulleys and remove from the engine compartment.
  2.  

If the belt being removed is located behind another belt, removal of the first belt is required.

To install:
  1. Position the replacement belt around the pulleys making sure belt routing is correct.
  2.  
  3. Adjust the belt until the correct tension is reached.
  4.  
  5. Once the desired tension is reached, secure the bolt or locknut and the pivot bolts. Recheck the belt tension and correct as required.
  6.  

 
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