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 MANUALSPLYMOUTH1984HORIZON BASE, 1.6 AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1 (ENGINE CONTROLS - SPECIFICATIONS)IGNITION SYSTEMSPARK PLUGSSPARK PLUG SPECIFICATIONS - 4-CYLINDER
1984 Plymouth Horizon Base, 1.6 A
Spark Plug Specifications - 4-Cylinder
1984 Plymouth Horizon Base, 1.6 ASECTION Spark Plug Specifications - 4-Cylinder
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 1994 Plymouth Sundance, 1994 Plymouth Laser, 1994 Plymouth Acclaim, 1994 Eagle Vision, and 1994 Eagle Talon. However, it is still accessible from the selected car via links, so may be relevant.
SPARK PLUG TYPE - 4-CYLINDER
| Application | Champion No. |
|---|---|
| 1.8L & 2.0L Non-Turbo | RN9YC4 |
| 2.0L Turbo | RN9YC |
| 2.2L & 2.5L | RN12YC |
SPARK PLUG SPECIFICATIONS - 4-CYLINDER
| Application | Gap In. (mm) | Torque Ft. Lbs. (N.m) |
|---|---|---|
| 1.8L & 2.0L Non-Turbo | .039-.043 (.99-1.09) | 15-21 (20-28) |
| 2.0L Turbo | .028-.031 (.71-.79) | 15-21 (20-28) |
| 2.2L & 2.5L | .035 (.89) | 20 (27) |
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.