2012 Mazda 6 V6-3.7LFACTORY OEM SERVICE PROCEDURE

Spark Plug: Service and Repair





SPARK PLUG REMOVAL/INSTALLATION [MZI 3.7 V6]

CAUTION:
- If a spark plug that is not as specified is installed, engine performance will be deteriorated. Install only the specified spark plug when replacing.

1. Disconnect the negative battery cable.

2. Remove the engine cover. Engine Cover Removal/Installation

3. Remove the dynamic chamber. Service and Repair

4. Remove the ignition coils. Service and Repair

5. Remove the spark plugs using a plug-wrench.

CAUTION:
- Apply small amount of the specified dielectric grease to the inside of the ignition coils, then install the ignition coils to the spark plugs.

- Specified grease: Motorcraft XG-3A

6. Install in the reverse order of removal.
Tightening torque
1 9-20 Nm {92-203 kgf-cm, 80-177 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.

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