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.
Spark Plug: Installation
Always remove the ignition coil assembly by grasping at the spark plug boot, turning the assembly 1/2 turn and pulling straight back in a steady motion.
- To avoid cross threading, start the spark plug into the cylinder head by hand.
- 3.5L engines tighten spark plugs to 28 N.m (20 ft. lbs.) torque, 2.7L engine tighten spark plugs to 17.6 N.m (13 ft. lbs.).
- Install ignition coil assembly onto spark plug.
- Install coil screws and tighten: 2.7L engine to 6.2 N.m (55 in.lbs.), 3.5L engines to 6.7 N.m (60 in.lbs.).
- Connect the electrical connector.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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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