SPECIAL TOOLS
7700 - Tester, Cooling System (Originally Shipped In Kit Number(s) 7700-A.) 8286 - Refractometer 8875A - Disconnect, Transmission Cooler Line (Originally Shipped In Kit Number(s) 9202, 9328, 9328-CAN, 9329, 9516, 9575.)
Scheme 11
Scheme 12
Scheme 13
Scheme 14
Scheme 14: ACCESSORY DRIVE BELT
| 1 - NORMAL CRACKS BELT OK |
|---|
| 2 - NOT NORMAL CRACKS REPLACE BELT |
When diagnosing serpentine drive belts, small cracks that run across ribbed surface of belt from rib to rib, are considered normal. These are not a reason to replace belt. However, cracks running along a rib (not across) are not normal. Any belt with cracks running along a rib must be replaced. Also replace belt if it has excessive wear, frayed cords or severe glazing.
for further belt diagnosis. Refer to SERPENTINE DRIVE BELT DIAGNOSIS CHART .
| CONDITION | POSSIBLE CAUSES | CORRECTION |
|---|
| RIB CHUNKING (ONE OR MORE RIBS HAS SEPARATED FROM BELT BODY) | 1. Foreign objects imbedded in pulley grooves. | 1. Remove foreign objects from pulley grooves. Replace belt. |
| 2. Installation damage. | 2. Replace belt. |
| RIB OR BELT WEAR | 1. Pulley(s) misaligned. | 1. Align pulley(s). |
| 2. Abrasive environment. | 2. Clean pulley(s). Replace belt if necessary. |
| 3. Rusted pulley(s). | 3. Clean rust from pulley(s). |
| 4. Sharp or jagged pulley groove tips. | 4. Replace pulley. |
| 5. Rubber deteriorated. | 5. Replace belt. |
| LONGITUDINAL BELT CRACKING (CRACKS BETWEEN TWO RIBS) | 1. Belt has mistracked from pulley groove. | 1. Replace belt. |
| 2. Pulley groove tip has worn away rubber to tensile member. | 2. Replace belt. |
| BELT SLIPS | 1. Belt slipping because of insufficient tension. | 1. Replace automatic belt tensioner. |
| 2. Belt routed | 2. Verify belt routing. |
| Incorrectly |
| 3. Incorrect belt. | 3. Replace belt. |
| 4. Belt or pulley subjected to substance (belt dressing, oil ethylene glycol) that has reduced friction. | 4. Replace belt and clean pulleys. |
| 5. Driven component bearing failure. | 5. Replace faulty component bearing. |
| 6. Belt glazed and hardened from heat and excessive slippage. | 6. Replace belt. |
| "GROOVE JUMPING" (BELT DOES NOT MAINTAIN CORRECT POSITION ON PULLEY) | 1. Belt tension either too high or too low. | 1. Replace automatic belt tensioner. |
| 2. Belt routed | 2. Verify belt routing. |
| Incorrectly. |
| 3. Incorrect belt. | 3. Replace belt. |
| 4. Pulley(s) not within design tolerance. | 4. Replace pulley(s). |
| 5. Foreign object(s) in grooves. | 5. Remove foreign objects from grooves. |
| 6. Pulley misalignment. | 6. Check and replace. |
| 7. Belt cord line is broken. | 7. Replace belt. |
| BELT BROKEN (NOTE: IDENTIFY AND CORRECT PROBLEM BEFORE NEW BELT IS INSTALLED) | 1. Excessive tension. | 1. Replace belt and automatic belt tensioner. |
| 2. Incorrect belt. | 2. Replace belt. |
| 3. Tensile member damaged during belt installation. | 3. Replace belt. |
| 4. Severe misalignment. | 4. Check and replace. |
| 5. Bracket, pulley, or bearing failure. | 5. Replace defective component and belt. |
| NOISE (OBJECTIONABLE SQUEAL, SQUEAK, OR RUMBLE IS HEARD OR FELT WHILE DRIVE BELT IS IN OPERATION) | 1. Belt slippage. | 1. Replace belt or automatic belt tensioner. |
| 2. Bearing noise. | 2. Locate and repair. |
| 3. Belt misalignment. | 3. Replace belt. |
| 4. Belt-to-pulley mismatch. | 4. Install correct belt. |
SERPENTINE DRIVE BELT DIAGNOSIS CHART
Scheme 15
| CAUTION | Do not let tensioner arm snap back to the freearm position, severe damage may occur to the tensioner. |
- Disconnect negative battery cable from battery.
- Rotate belt tensioner (7) until it contacts its stop. Remove belt (4), then slowly rotate the tensioner (7) into the freearm position.
Scheme 16
Scheme 16: 3.6L ELECTRONIC POWER STEERING
| CAUTION | Do not let the tensioner arm snap back to the freearm position, severe damage may occur to the tensioner. |
- Disconnect negative battery cable from battery.
- Remove the air cleaner intake system.
- Rotate belt tensioner (7) until it contacts its stop. Remove belt (3), then slowly rotate the tensioner (7) into the freearm position.
Scheme 17
| 1 - POWER STEERING PUMP PULLEY |
|---|
| 2 - ACCESSORY DRIVE BELT |
| 3 - A/C COMPRESSOR PULLEY |
| 4 - CRANKSHAFT PULLEY |
| 5 - GENERATOR PULLEY |
| 6 - IDLER PULLEY |
| 7 - WATER PUMP PULLEY |
| 8 - AUTOMATIC BELT TENSIONER |
- Remove the air intake tube between intake manifold and air filter assembly.
- Using a suitable square drive tool, release the belt tension by rotating the tensioner (8) clockwise . Rotate belt tensioner (8) until belt (2) can be removed from pulleys.
- Remove belt (2).
- Gently release tensioner (8).
Scheme 18
- Check condition of all pulleys. CAUTION: When installing the serpentine accessory drive belt, the belt MUST be routed correctly. If not, the engine may overheat due to the water pump rotating in the wrong direction.
- Install new belt (4). Route the belt around all pulleys except the idler pulley (1). Rotate the tensioner arm (7) until it contacts its stop position. Route the belt (4) around the idler (1) and slowly let the tensioner (7) rotate into the belt. Make sure the belt (4) is seated onto all pulleys.
- With the drive belt installed, inspect the belt wear indicator. The gap between the tang and the housing stop (measurement A) must not exceed 24 mm (.94 inches).
