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.
2004 Mazda RX8 2RTR-1.3LFACTORY OEM SERVICE PROCEDURE
Spark Plug: Service and Repair
SPARK PLUG REMOVAL/INSTALLATION
CAUTION: If a spark plug that is not as specified is installed, sealing performance will be deteriorated. Install only the specified spark plug when replacing.
1. Remove the engine cover.
2. Remove the battery cover.
3. Disconnect the negative battery cable.
4. Position the high-tension lead out of the way. (spark plug side)
5. Remove the spark plugs using a plug-wrench.
CAUTION: Install spark plugs marked with white paint on the leading side and spark plugs with blue paint on the trailing side.
NOTE: It is easier to remove some spark plugs from beneath the vehicle.
6. Install in the reverse order of removal.
Tightening torque: 12.8 - 17.7 N.m {131 - 180 kgf.cm, 114 - 156 in.lbf}
CAUTION: If a spark plug that is not as specified is installed, sealing performance will be deteriorated. Install only the specified spark plug when replacing.
1. Remove the engine cover.
2. Remove the battery cover.
3. Disconnect the negative battery cable.
4. Position the high-tension lead out of the way. (spark plug side)
5. Remove the spark plugs using a plug-wrench.
CAUTION: Install spark plugs marked with white paint on the leading side and spark plugs with blue paint on the trailing side.
NOTE: It is easier to remove some spark plugs from beneath the vehicle.
6. Install in the reverse order of removal.
Tightening torque: 12.8 - 17.7 N.m {131 - 180 kgf.cm, 114 - 156 in.lbf}
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.