Engine System-General Information: Removal & Installation Ford Mustang V

Cylinder Block Core Plug Replacement

SPECIAL TOOL(S) Impact Slide Hammer 100-001 (T50T-100-A)

Scheme 917

MATERIAL SPECIFICATIONS

Scheme 918

1. Use a slide hammer or tools suitable to remove the cylinder block core plug. see scheme 58: Removing Cylinder Block Core Plug Using Slide Hammer
2. Inspect the cylinder block plug bore for any damage that would interfere with the correct sealing of the plug. If the cylinder block plug bore is damaged, bore for the next oversize plug. NOTE: Oversize plugs are identified by the OS stamped in the flat located on the cup side of the plug.
3. Coat the cylinder block core plug and bore lightly with Threadlock 262 and install the cylinder block core plug.

1. Use a tool suitable to seat the cup-type cylinder block core plug.

1. Use tool suitable to seat the expansion-type cylinder block core plug.

Scheme 919

Scheme 920

Scheme 921

Scheme 922

Scheme 923

Scheme 924

Scheme 925

1. Inspect the spark plug for a bridged gap. Check for deposit build-up closing the gap between the electrodes. Deposits are caused by oil or carbon fouling. Clean the spark plug. see scheme 61: Identifying Spark Plug With Bridged Gap
2. Check for oil fouling. Check for wet, black deposits on the insulator shell bore electrodes, caused by excessive oil entering the combustion chamber through worn rings and pistons, excessive valve-to-guide clearance or worn or loose bearings. Correct the oil leak concern. Install a new spark plug. see scheme 62: Identifying Oil Fouled Spark Plug
3. Inspect for carbon fouling. Look for black, dry, fluffy carbon deposits on the insulator tips, exposed shell surfaces and electrodes, caused by a spark plug with an incorrect heat range, dirty air cleaner, too rich a fuel mixture or excessive idling. Clean the spark plug. see scheme 63: Identifying Spark Plug Carbon Fouling
4. Inspect for normal burning. Check for light tan or gray deposits on the firing tip. see scheme 64: Identifying Normal Burning Spark Plug
5. Inspect for pre-ignition, identified by melted electrodes and a possibly damaged insulator. Metallic deposits on the insulator indicate engine damage. This may be caused by incorrect ignition timing, wrong type of fuel or the unauthorized installation of a heli-coil insert in place of the spark plug threads. Install a new spark plug. see scheme 65: Identifying Spark Plug With Pre-Ignition Condition
6. Inspect for overheating, identified by white or light gray spots and with bluish-burnt appearance of electrodes. This is caused by engine overheating, wrong type of fuel, loose spark plugs, spark plugs with an incorrect heat range, low fuel pump pressure or incorrect ignition timing. Install a new spark plug. see scheme 66: Identifying Overheated Spark Plug
7. Inspect for fused deposits, identified by melted or spotty deposits resembling bubbles or blisters. These are caused by sudden acceleration. Clean the spark plug. (Scheme 917): Identifying Fused Deposits On Spark Plug