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 MANUALSMERCURY2009MILAN AWD L4-2.3LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTTUNE-UP AND ENGINE PERFORMANCE CHECKSSPARK PLUGSERVICE AND REPAIRSPARK PLUGS
2009 Mercury Milan AWD L4-2.3L
Spark Plugs
2009 Mercury Milan AWD L4-2.3LSECTION Spark Plugs
Spark Plugs
Removal
1. Remove the 2 nuts, the bolt and the generator air inlet duct.
2. Disconnect the 4 ignition coil-on-plug electrical connectors.
3. NOTE: When removing the ignition coil-on-plugs, a slight twisting motion will break the seal and ease removal.
Remove the 4 bolts and the ignition coil-on-plugs.
4. 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 in the spark plug well before removing the spark plugs.
Remove the 4 spark plugs.
Installation
1. Inspect the spark plugs.
2. Adjust the spark plug gap as necessary.
3. 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 12 Nm (106 lb-in).
4. NOTE: Apply a small amount of dielectric grease to the inside of the ignition coil-on-plug boots before attaching to the spark plugs.
Install the 4 ignition coil-on-plugs and bolts.
- Tighten to 10 Nm (89 lb-in).
5. Connect the 4 ignition coil-on-plug electrical connectors.
6. Install the generator air inlet duct and the 2 nuts and the bolt.
- Tighten to 6 Nm (53 lb-in).
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.