VEHICLES WITH TWO POLY-V BELTS
An accessory component rotary drive is accomplished with two poly-V type drive belts. Once correctly installed the belts are self-adjusting with automatic hydraulic tensioners and are maintenance free.
VEHICLES WITH SINGLE V BELT
- Tension should be checked using a V-belt tension gauge special tool 11 5 020. Tension is adjusted through a toothed rack mechanism (3). (Scheme 1)
- Adjust belt by first loosening mounting nuts/bolts (1, 2) until unit pivots freely. (Scheme 1)
- Use a torque wrench and a crowfoot wrench to turn tensioning gear bolt (3). Hold wrench steady and tighten locknut on rear of tensioning gear bolt.
- Tighten all other mounting nuts to specification. See.
Scheme 1
- On M20, M30, M42, S14 and S38 routing will be similar. (Scheme 1)
- On M43 and M44 (Scheme 2)
Scheme 2
| Engine | See | ||
|---|---|---|---|
| M50, S50 & S54 | (Scheme 3) | ||
| M52, S52 & M54 | |||
| Alternator Drive Belt | |||
| Without Auxiliary Tensioning Roller | (Scheme 4) | ||
| With Auxiliary Tensioning Roller | (Scheme 5) | ||
| A/C Compressor Drive Belt | |||
| With Hydraulic Drive Belt & Tension Jack | (Scheme 6) | ||
| With Mechanical Drive Belt & Tension Jack | (Scheme 7) | ||
| N62 | |||
| Alternator Drive Belt | (Scheme 8) | ||
| A/C Compressor Drive Belt | (Scheme 9) | ||
| S62 | |||
| Alternator Drive Belt | (Scheme 10) | ||
| A/C Compressor Drive Belt | (Scheme 11) | ||
DRIVE BELT ROUTING IDENTIFICATION
Scheme 3
Scheme 4
Scheme 5
Scheme 6
Scheme 7
Scheme 8
Scheme 9
Scheme 10
Scheme 11
TROUBLE SHOOTING
Note. For electric cooling fan diagnosis and testing, see appropriate ELECTRIC COOLING FANS article. For cooling system removal and installation procedures, see appropriate REMOVAL & INSTALLATION article.
| Application | Specification | ||
|---|---|---|---|
| Coolant Replacement Interval | 36 Months | ||
| Coolant Capacity | |||
| M20 | 11.0 Qts. (10.5L) | ||
| M30 (Including Heater) | 12.7 Qts. (12.0L) | ||
| M30 (With Integrated Air Conditioner) | 13.2 Qts. (12.5L) | ||
| M42 & M44 (Including Heater) | 6.7 Qts. (6.5L) | ||
| M42 & M44 (With Integrated Air Conditioner) | 7 Qts. (6.7L) | ||
| M50 (Including Heater) | 11.1 Qts. (10.5L) | ||
| M50 (With Integrated Air Conditioner) | 11.6 Qts. (11.0L) | ||
| M54 | 8.9 Qts. (8.4L) | ||
| M52 (Including Heater) | 10.6 Qts. (10.0L) | ||
| N62 | 14.8 Qts. (14.0L) | ||
| S14 | 10.0 Qts. (9.5L) | ||
| S38 | 14 Qts. (13.3L) | ||
| S50 | 11.2 Qts. (10.75L) | ||
| S52 | 11.4 Qts. (10.8L) | ||
| S54 | 10.6 Qts. (10.0L) | ||
| S62 (With Latent Heat Accumulator) | 14.3 Qts. (13.5L) | ||
| S62 (Without Latent Heat Accumulator) | 12.7 Qts. (12.0L) | ||
| Fan Clutch | |||
| Fan On Temperature | |||
| M30 | 172-187° F (78-86° C) | ||
| S14, M20, M50, M52, S52 & M54 | 194° F (90° C) | ||
| S38 & S50 | 198° F (92° C) | ||
| M42 & M44 | 190-205° F (88-96° C) | ||
| S62 | 196-210° F (91-99° C) | ||
| Fan Off Temperature | |||
| S14 | 113° F (45° C) | ||
| M20, M30, M42, M44, M50, M52, S38, S50, S52, M54 & S62 | 140° F (60° C) | ||
| Pressure Relief Valve Opens | 26.1-30.5 psi (1.8-2.1 bar) | ||
| Test Pressure For Cooling System | |||
| M20, M30, M42, M44, M50, M52, M54, S14, S38, S50 & S52 | 14.5 psi (1 Bar) | ||
| M52, M54, N62, S62 & S54 | 21.8 psi (1.5 Bar) | ||
| Thermostat Opening Temperature (Stamped In Thermostat) | |||
| S38 & S62 | 174° F (79° C) | ||
| S14, S50, M30, M20 & M50 | 176° F (80° C) | ||
| M42, M52 & S52 | 198° F (92° C) | ||
| M44 | 203° F (95° C) | ||
| M54 | 207° F (97° C) | ||
COOLING SYSTEM SPECIFICATIONS
TORQUE SPECIFICATIONS
| Application | Ft. Lbs. (N.m) |
|---|---|
| Tensioning Gear Lock Nut | 18 (24) |
| In. Lbs. (N.m) | |
| A/C Belt Tension | 62-75 (7-8.5) |
| Alternator Belt Tension | 62 (7) |
| Power Steering Belt Tension | 71-75 (8-8.5) |
TORQUE SPECIFICATIONS