Installation

5.7L/6.1L

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.

Always tighten spark plugs to the specified torque. Over tightening can cause distortion resulting in a change in the spark plug gap or a cracked porcelain insulator.

1. Start the spark plug into the cylinder head by hand to avoid cross threading.

2. Tighten 5.7L spark plugs to 18 Nm (13 ft. lbs.) torque. Tighten 6.1L spark plugs to 15-20 Nm (11-15 ft. lbs.) torque.

3. Before installing ignition coil(s), check condition of coil o-ring and replace as necessary. To aid in coil installation, apply silicone to coil o-ring.

4. Install ignition coil(s).