Spark Plugs: Installation

WARNING: This page is about a different car, the 2008 Mercury Mariner and 2008 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the spark plugs.

Fig 1: Identifying Spark Plugs Condition

Courtesy of FORD MOTOR CO.

Item	Part Number	Description
1	-	Deposits bridging spark plug gap
2	-	Wet black deposits (oil fouling)
3	-	Dry black deposits (carbon fouling)
4	-	Normal spark plug
5	-	Pre-ignition
6	-	Overheating
7	-	Fused spot deposits

Adjust the spark plug gap as necessary.

Fig 2: Spark Plug Gap With Specification

Courtesy of FORD MOTOR CO.

NOTE: Only use hand tools when removing or installing the spark plugs, or damage can occur to the cylinder head or spark plug.

Install the 4 spark plugs.
- Tighten to 12 Nm (9 lb-ft).

NOTE: Apply a small amount of dielectric grease to the inside of the ignition coil boots before attaching to the spark plugs.

Install the 4 ignition coils and stud bolts.
- Tighten to 8 Nm (71 lb-in).
Connect the 4 ignition coil electrical connectors.
Attach the 2 wire harness retainers to the ignition coil stud bolts.