Spark Plug: Installation

Fig 1: Using Spark Plug Gap Gauge To Gap Spark Plugs

Courtesy of DAIMLERCHRYSLER CORP.

Using a spark plug gap gauge (1), gap the spark plugs to 1.02 mm (.040 in.) before installation.
Start the spark plugs into the cylinder head by hand to avoid cross threading.
Tighten the spark plugs to 28 N.m (21 ft. lbs.).

Fig 2: Firing Plugs Operation
Courtesy of DAIMLERCHRYSLER CORP.

NOTE: When installing the spark plug cables, route the cables correctly. Failure to route the cables properly can cause improper spark plug phase-shift.
Install the spark plug cables to the appropriate spark plug location (G & K) (plug side).
NOTE: Refer to the reference pad cast into the cylinder head cover to identify proper spark plug/spark plug cable orientation.

Fig 3: Insuring Firm Connection Is Made From Spark Plug Cables To Spark Plugs
Courtesy of DAIMLERCHRYSLER CORP.

NOTE: When installing spark plug cables, insure a positive connection is made. A snap should be felt when a good connection is made between the spark plug cable and the spark plug.
Insure a firm connection is made from the spark plug cables (2) to the spark plugs.