Drive Belt: Service and Repair
REMOVALGENERATOR/POWER STEERING BELT
1. Loosen tensioner pulley locking nut (Fig. 1).
2. Loosen belt adjusting bolt (Fig. 1).
3. Remove generator/power steering belt.
AIR CONDITIONING BELT
NOTE: The A/C drive belt self tensioner is NOT a dynamic tensioner. After adjustment the tensioner bracket bolts are tightened. The torsion spring is no longer responsible for tensioning the A/C belt. The torsion spring is only used for initial belt tensioning.
1. Remove generator/power steering belt to gain access to A/C belt.
2. Loosen BUT DO NOT REMOVE tensioner locking bolt and pivot bolt (Fig. 2).
3. Insert 1/2" drive breaker bar into square opening on belt tensioner. Rotate tensioner counterclockwise until belt can be removed from pulleys (Fig. 2).
4. Slowly rotate tensioner clockwise to relieve spring load.
CLEANING
Clean all foreign debris from belt pulley grooves. The belt pulleys must be free of oil, grease, and coolants before installing the drive belt.
INSPECTION
Belt replacement under any or all of the following conditions is required:
^ Excessive wear
^ Frayed cords
^ Severe glazing
Poly-V Belt system may develop minor cracks across the ribbed side (due to reverse bending). These minor cracks are considered normal and acceptable. Parallel cracks are not (Fig. 3).
NOTE: Do not use any type of belt dressing or restorer on Poly-V Belts.
INSTALLATION
AIR CONDITIONING BELT - NEW
WARNING: DO NOT REMOVE A/C BELT TENSIONER LOCKING BOLT WITHOUT FIRST HOLDING THE TENSIONER WITH A 1/2" DRIVE BREAKER BAR, AS PERSONAL INJURY COULD RESULT.
NOTE: Verify that torsion spring position is in the new belt position before installing a NEW belt (Fig. 4). If torsion spring is not in the new belt position, follow steps 1-7 to change the tensioner spring from the USED belt position to the NEW belt position.
1. Insert a 1/2" drive breaker bar into the square opening on the tensioner. Hold counterclockwise pressure on tensioner while removing the locking bolt (Fig. 2).
2. Carefully release spring load of the torsion spring on the tensioner.
3. Remove pivot bolt, tensioner, and spring from front timing cover.
4. Insert spring arm into the NEW belt position on the tensioner (Fig. 4).
5. Install torsion spring, tensioner, and pivot bolt.
6. Install pivot bolt. Tighten only finger tight, at this time.
7. Using a 1/2" drive breaker bar, apply counterclockwise pressure until locking bolt can be installed.
8. Install the NEW belt by rotating the tensioner counterclockwise until the NEW belt can be installed on pulleys. See (Fig. 5) for belt routing.
9. Release tensioner and remove breaker bar. Belt is automatically adjusted with the tensioner's torsion spring.
10. Tighten tensioner locking bolt and pivot bolt to 28 Nm (250 in. lbs.) (Fig. 2).
11. Install generator/power steering belt.
AIR CONDITIONING BELT - USED
NOTE: A "used belt" is considered having more than 500 miles of service use.
NOTE: Perform steps 1-7 to change the tensioner spring from the NEW belt position, to the USED belt position.
1. Insert a 1/2" drive breaker bar into the square opening on tensioner. Hold counterclockwise pressure on tensioner, while removing tensioner locking bolt (Fig. 2).
2. Carefully release the tension of spring on tensioner.
3. Remove pivot bolt, tensioner, and spring from front cover.
4. Insert spring into the USED belt position on tensioner bracket (Fig. 4).
5. Install spring, tensioner bracket, and pivot bolt.
6. Install pivot bolt. Tighten only finger tight, at this time.
7. Using a 1/2" drive breaker bar, apply counterclockwise pressure until locking bolt can be installed.
8. Install the USED belt by rotating tensioner counterclockwise until belt can be installed on pulleys. See (Fig. 5) for belt routing.
9. Release tensioner and remove breaker bar. Belt is automatically adjusted with the tensioner's torsion spring.
10. Tighten tensioner locking bolt and pivot bolt to 28 Nm (250 in. lbs.) (Fig. 2).
11. Install generator/power steering belt.
GENERATOR/POWER STEERING BELT INSTALLATION
1. Install generator/power steering belt on pulleys.
2. Tighten belt adjusting bolt to proper belt tension (Fig. 1).
3. Tighten tensioner locking nut (Fig. 1).
ADJUSTMENTS - BELT TENSION
Use belt tension gauge, Special Tool 7198 for conventional V-belts and Poly-V belts.
Adjust the belt tension for NEW or USED belt tension applications.
BELT TENSION CHART-2.7/3.5L ENGINES