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.
1991 Lexus LS 400FACTORY OEM SERVICE PROCEDURE
Drive Belt Adjustment
BELT ADJUSTMENT
| Application | (1) Lbs. (kg) | ||||||
|---|---|---|---|---|---|---|---|
| ES250 | |||||||
| Alternator | |||||||
| New | 180-185 (81-83) | ||||||
| Used (2) | 95-135 (43-61) | ||||||
| Power Steering | |||||||
| New | 100-150 (45-68) | ||||||
| Used (2) | 60-100 (27-45) | ||||||
| LS400 | |||||||
| Serpentine Belt | Automatic Tensioner | ||||||
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Factory Service Tools
Use the Manual With the Right Hardware
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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.