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.
2008 Ford Explorer 2WD V6-4.0LFACTORY OEM SERVICE PROCEDURE
Spark Plug: Service and Repair
SPARK PLUGS
Exploded View
Special Tool(s)
Removal and Installation
1. CAUTION: It is important to twist the spark plug wire boot while pulling upward to avoid possible damage to the spark plug wire.
NOTE: Spark plug wires must be connected to the correct spark plug.
With a twisting motion, use the special tool to pull the spark plug wire from the spark plug.
2. NOTE: Use compressed air to remove any foreign material from the spark plug wells before removing the spark plugs.
Remove the spark plugs.
- To install, tighten to 17 Nm (13 lb-ft).
3. Use a suitable spark plug gap tool to check and adjust the spark plug gap.
4. NOTE: Apply silicone dielectric compound to the inside of the spark plug wire boots.
To install, reverse the removal procedure.
Exploded View
Special Tool(s):
Special Tool(s)
Removal and Installation
1. CAUTION: It is important to twist the spark plug wire boot while pulling upward to avoid possible damage to the spark plug wire.
NOTE: Spark plug wires must be connected to the correct spark plug.
With a twisting motion, use the special tool to pull the spark plug wire from the spark plug.
2. NOTE: Use compressed air to remove any foreign material from the spark plug wells before removing the spark plugs.
Remove the spark plugs.
- To install, tighten to 17 Nm (13 lb-ft).
3. Use a suitable spark plug gap tool to check and adjust the spark plug gap.
4. NOTE: Apply silicone dielectric compound to the inside of the spark plug wire boots.
To install, reverse the removal procedure.
Factory Service Tools
Use the Manual With the Right Hardware
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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.