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 Mazda 626 BaseFACTORY OEM SERVICE PROCEDURE
Drive Belt Adjustment
BELT ADJUSTMENT SPECIFICATIONS (NEW BELT)
| Application | (1) Deflection In. (mm) | ||||||
|---|---|---|---|---|---|---|---|
| B2200 | |||||||
| Alternator & Power Steering Pump | 9/32-5/16 (7-8) | ||||||
| A/C Compressor | 25/64-15/32 (10-12) | ||||||
| Timing Belt | 5/16-23/64 (8-9) | ||||||
| B2600i | |||||||
| Alternator | 25/64-15/32 (10-12) | ||||||
| A/C Compressor | 5/16-25/64 (8-10) | ||||||
| Power Steering Pump | 9/32 (7) | ||||||
| Miata | |||||||
| Timing Belt | 23/64-29/64 (9-11.5) | ||||||
| All Other Belts | 5/16-23/64 (8-9) | ||||||
| MPV | |||||||
| Alternator | 23/64-25/64 (9-10) | ||||||
| A/C Compressor | |||||||
| 2.6L (4-Cyl.) | 5/16-25/64 (8-10) | ||||||
| 3.0L (V6) | 11/64-13/64 (4.5-5) | ||||||
| Power Steering Pump | 9/32 (7) | ||||||
| Timing Belt (3.0L V6) (2) | 13/64-9/32 (5-7) | ||||||
| MX-6 & 626 | |||||||
| Alternator | 15/64-5/16 (6-8) | ||||||
| A/C Compressor | 9/32-23/64 (7-9) | ||||||
| Power Steering Pump | 5/16-25/64 (8-10) | ||||||
| Protege & 323 | |||||||
| All Belts | 5/16-23/64 (8-9) | ||||||
| RX7 | |||||||
| Alternator | 15/32-19/32 (12-15) | ||||||
| A/C Compressor | 15/64-5/16 (6-8) | ||||||
| Air Pump & Power Steering Pump | 7/16-33/64 (11-13) | ||||||
| 929 | |||||||
| Alternator | 23/64-25/64 (9-10) | ||||||
| A/C Compressor & Power Steering Pump | 9/32-23/64 (7-9) | ||||||
| Timing Belt (2) | 13/64-9/32 (5-7) | ||||||
|
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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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