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.
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HOMESERVICE MANUALSVOLVO1991940 TURBO, 4D SEDAN, AW71REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - SPECIFICATIONSIGNITION SYSTEMSPARK PLUGSNOTES
1991 Volvo 940 Turbo, 4D Sedan, AW71
Spark Plugs: Notes
1991 Volvo 940 Turbo, 4D Sedan, AW71SECTION Notes
SPARK PLUG TYPE
| Application | Bosch |
|---|---|
| Except 940 GLE | WR7DC |
| 940 GLE | WR6DC |
SPARK PLUG SPECIFICATIONS
| Application | Gap: In. (mm) | Torque: Ft. Lbs. (N.m) |
|---|---|---|
| All Models | .028-.032 (.70-.80) | 18 (25) |
IGNITION TIMING (Degrees BTDC @ RPM)
| Application | (1) Timing | ||
|---|---|---|---|
| Except 940 GLE | 12 @ 725-825 | ||
| 940 GLE | 15 @ 800-900 | ||
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RENDER: 1.0x
NO RELATED
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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.