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 MANUALSJEEP2009COMMANDER 2WD V6-3.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMSPARK PLUGSERVICE AND REPAIRSPARK PLUG - INSTALLATION
2009 Jeep Commander 2WD V6-3.7L
Spark Plug - Installation
2009 Jeep Commander 2WD V6-3.7LSECTION Spark Plug - Installation
3.7L
1. Check and adjust the spark plug gap with a gap gauging tool (1) Spark Plug Specifications
CAUTION: Special care should be taken when installing spark plugs into the cylinder head spark plug wells. Be sure the plugs do not drop into the plug wells as electrodes can be damaged.
2. Start the spark plug into the cylinder head by hand to avoid cross threading.
3. Tighten the spark plugs to 27 Nm (20 ft. lbs.).
4. Before installing the ignition coil (1), check the condition of the coil O-ring and replace as necessary. Apply silicone based grease such as Mopar(R) Dielectric Grease into the spark plug end of the rubber boot, coil O-rings and to the top of spark plugs.
5. Install the ignition coil (1) Ignition Coil - Installation
6. Install all the necessary air filter tubing and air intake components at the top of the engine and at the throttle body.
RENDER: 1.0x
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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.