F 350 4WD Pickup V8-351 5.8L VIN H EFI (1997)
Spark Plug: Service and Repair
REMOVAL
1. Remove air cleaner inlet tube assembly.
2. Remove wire from spark plug using Spark Plug Wire Remover T74P-6666-A.
3. Remove any dirt or foreign material from spark plug areas of cylinder head with compressed air, then remove spark plugs using appropriate tools.
INSTALLATION
1. Refer to the Spark Plug Inspection Chart to determine spark plug condition. Replace spark plugs as required.
2. Check and set the spark plug gap to 1.07-1.17mm (0.042-0.046 in) using an appropriate gapping tool.
3. Install spark plugs. Tighten to 9-20 Nm (7-15 lb ft).
4. Coat entire interior surface of ignition wire boot with Silicone Brake Caliper Grease and Dielectric Compound D7AZ-19A331-A (Motorcraft
WA-10) or equivalent meeting Ford specification ESE-M1C171-A. Install onto proper spark plug. Make sure spark plug wire boot is completely
seated.
5. Install air cleaner outlet tube.
6. Start engine and check for proper operation.
