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
Spark Plugs
SPARK PLUG TYPE
| Application | Plug Type (NGK) | |||
|---|---|---|---|---|
| B2200 | ||||
| Carbureted | BPR5ES or BPR6ES | |||
| Fuel-Injected | BPR5ES-11 or BPR6ES-11 | |||
| B2600i | ZFR5F-11 or ZFR6F-11 | |||
| Miata | BKR5E-11, BKR6E-11 or BKR7E-11 | |||
| MPV | ZFR5F-11 or ZFR6F-11 | |||
| MX-6 & 626 | ZFR5F-11, ZFR6F-11 or ZFR7F-11 | |||
| Protege | ||||
| DOHC | BKR5E-11, BKR6E-11 or BKR7E-11 | |||
| SOHC | BKR5E-11 or BKR6E-11 | |||
| 323 | BKR5ES-11 or BKR6ES-11 | |||
| (1) RX7 | ||||
| Leading | BUR7EQ | |||
| Trailing | BUR9EQ | |||
| 929 | ||||
| DOHC | ZFR5F-11 or ZFR6F-11 | |||
| SOHC | ZFR5F-11, ZFR6F-11 or ZFR7F-11 | |||
|
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SPARK PLUG SPECIFICATIONS
| Application | Gap In. (mm) | Torque Ft. Lbs. (N.m) | ||
|---|---|---|---|---|
| B2200 (Carbureted) | .031 (.80) | 13 (18) | ||
| RX7 | (1) .055 (1.3) | 11 (15) | ||
| All Others | .041 (1.0) | 13 (18) | ||
|
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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:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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