Spark Plugs: Installation

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

Inspect the spark plugs.

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

Fig 1: Identifying Spark Plugs Condition

Courtesy of FORD MOTOR CO.

Adjust the spark plug gap as necessary.

Fig 2: Spark Plug Gap (With Specifications)

Courtesy of FORD MOTOR CO.

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

Install the 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 ignition coils and bolts.
- Tighten to 8 Nm (71 lb-in).
Connect the ignition coil electrical connectors.
Connect the battery ground cable. For additional information, refer to BATTERY, MOUNTING AND CABLES article.