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.
1993 Honda Prelude VTECFACTORY OEM SERVICE PROCEDURE
Spark Plugs
SPARK PLUG TYPE
| Application | NGK | ||
|---|---|---|---|
| Accord | ZFR5F-11 | ||
| Civic | |||
| 1.5L Engine (D15B7) | ZFR5F-11 | ||
| 1.5L Engine (D15B8 & D15Z1) | ZFR4F-11 | ||
| 1.6L Engine (D16Z6) | ZFR5J-11 | ||
| Civic Del Sol | |||
| 1.5L Engine | ZFR5F-11 | ||
| 1.6L Engine | ZFR6J-11 | ||
| Prelude | |||
| 2.2L Engine | |||
| F22A1 | ZFR5F-11 | ||
| H22A1 | PZFR6F-11 | ||
| 2.3L Engine | ZFR6F-11 | ||
SPARK PLUG SPECIFICATIONS
| Application | Gap In. (mm) | Torque Ft. Lbs. (N.m) |
|---|---|---|
| All Models | .039-.043 (1.0-1.1) | 13 (18) |
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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