Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1990 Ford Bronco II RWD, Standard, M5OD-R1FACTORY OEM SERVICE PROCEDURE
Service Intervals & Specifications
REPLACEMENT INTERVALS
| Component | Interval (Miles) |
|---|---|
| Air Filter | 30,000 |
| Cam Timing Belt | 60,000 |
| Coolant | 30,000 |
| Fuel Filter | 30,000 |
| Oil & Filter | 7500 |
| PCV Valve | 30,000 |
| Spark Plugs | 30,000 |
| Spark Plug Wires | 60,000 |
| Transfer Case Oil | 60,000 |
| Transmission Oil | 60,000 |
DRIVE BELT ADJUSTMENT
| Application | New Belt: Lbs. (kg) | (1) Used Belt: Lbs. (kg) | ||||
|---|---|---|---|---|---|---|
| Standard "V" Belts | ||||||
| 1/4" | 50-90 (23-41) | 40-60 (18-27) | ||||
| All Others | 120-160 (54-73) | 90-120 (41-54) | ||||
| Ribbed "V" Belts | ||||||
| 4-Rib: Air Pump Only | 90-130 (41-59) | 90-120 (41-54) | ||||
| 5-Rib | 120-170 (54-77) | 110-130 (50-59) | ||||
| 6-Rib | ||||||
| Fixed | 150-190 (68-84) | 140-160 (64-73) | ||||
| With Tensioner | 100-130 (44-59) | 100-180 (44-82) | ||||
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Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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