Spark Plug Wire Harness Replacement 5.0L, 5.7L
Removal Procedure
- Disconnect the spark plug
wire at each spark plug for 5.0L, 5.7L.
• | Twist the boots one-half turn before removing. |
• | Pull only on the boot or use a tool designed for this purpose
in order to remove the wire from each spark plug. |
- Disconnect the spark plug wire from the Distributor.
• | Twist each spark plug boot 1/2 turn. |
• | Pull only on the boot or use a tool designed for this purpose
in order to remove the wires from the Distributor. |
Installation Procedure
- Install the spark plug
wires at the Distributor for 5.0L, 5.7L.
- Install the spark plug wire to each spark plug.
Notice: If the boot to wire movement has occurred, the boot will give a false
visual impression of being fully seated. Ensure that the boots have been properly
assembled by pushing sideways on the installed boots. Failure to properly
seat the terminal onto the spark plug will lead to wire core erosion and result
in an engine misfire or crossfire condition, and possible internal
damage to the engine.
- Inspect the wires for proper installation:
• | Push sideways on each boot in order to inspect the seating. |
• | Reinstall any loose boot. |
• | Wire routings must be kept intact during service and followed
exactly when wires have been disconnected or when replacement of the wires
is necessary. Failure to route the wires properly can lead to radio ignition
noise and crossfiring of the plugs, or shorting of the leads to the ground. |
• | Any time the spark plug wires or boots are installed on the spark
plugs, new dielectric grease needs to be applied inside the boot. |
Spark Plug Wire Harness Replacement 7.4 L
Removal Procedure
- Disconnect the spark plug
wire at each spark plug for 7.4L.
• | Twist the boots one-half turn before removing. |
• | Pull only on the boot or use a tool designed for this purpose
in order to remove the wire from each spark plug. |
- Disconnect the spark plug wire from the Distributor.
• | Twist each spark plug boot 1/2 turn. |
• | Pull only on the boot or use a tool designed for this purpose
in order to remove the wires from the Distributor. |
Installation Procedure
- Install the spark plug
wires at the Distributor for 7.4L.
- Install the spark plug wire to each spark plug.
Notice: If the boot to wire movement has occurred, the boot will give a false
visual impression of being fully seated. Ensure that the boots have been properly
assembled by pushing sideways on the installed boots. Failure to properly
seat the terminal onto the spark plug will lead to wire core erosion and result
in an engine misfire or crossfire condition, and possible internal
damage to the engine.
- Inspect the wires for proper installation:
• | Push sideways on each boot in order to inspect the seating. |
• | Reinstall any loose boot. |
• | Wire routings must be kept intact during service and followed
exactly when wires have been disconnected or when replacement of the wires
is necessary. Failure to route the wires properly can lead to radio ignition
noise and crossfiring of the plugs, or shorting of the leads to the ground. |
• | Any time the spark plug wires or boots are installed on the spark
plugs, new dielectric grease needs to be applied inside the boot. |