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 MANUALSFORD2012F 250 2WD SUPER DUTY V8-6.2LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMSPARK PLUGSERVICE AND REPAIRSPARK PLUGS
2012 Ford F 250 2WD Super Duty V8-6.2L
Spark Plugs
2012 Ford F 250 2WD Super Duty V8-6.2LSECTION Spark Plugs
Spark Plugs
Removal
NOTICE: The spark plug procedure must be followed exactly or damage to the cylinder head and spark plug will result.
NOTICE: Do not remove the spark plugs when the engine is hot or cold soaked. Spark plug thread or cylinder head damage can occur. Make sure the engine is warm (hand touch after cooling down) prior to spark plug removal.
Upper spark plugs
1. Remove the ignition coil-on-plugs. For additional information, refer to Ignition Coil-On-Plug Ignition Coil-On-Plug.
Lower spark plugs
2. Disconnect the ignition wire from the lower spark plugs.
All spark plugs
3. NOTICE: Only use hand tools when removing or installing the spark plugs or damage can occur to the cylinder head or spark plug.
NOTE: Use compressed air to remove any foreign material from the spark plug well before removing the spark plugs.
Remove the spark plugs.
4. Inspect the spark plugs.
Installation
All spark plugs
1. Adjust the spark plug gaps as necessary. For the correct spark plug gap specification, refer to Specifications.
2. NOTICE: Only use hand tools when removing or installing the spark plugs or damage can occur to the cylinder head or spark plug.
Install the spark plugs.
- Tighten to 18 Nm (159 lb-in).
Lower spark plugs
3. Connect the ignition wire to the lower spark plugs.
Upper spark plugs
4. Install the ignition coil-on-plugs. For additional information, refer to Ignition Coil-On-Plug Ignition Coil-On-Plug.
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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.