Cylinder Block Core Plug Replacement
SPECIAL TOOL(S) Slide Hammer 100-001 (T50T-100-A)
Scheme 381
| Item | Specification |
|---|---|
| Threadlock 262 TA-26 | WSK-M2G351-A6 |
MATERIAL
Scheme 382
- Use a slide hammer or tools suitable to remove the cylinder block core plug. see scheme 20: Removing Cylinder Block Core Plug Using Slide Hammer
- 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.
- Coat the cylinder block core plug and bore lightly with Threadlock 262 and install the cylinder block core plug.
Cup-Type
- Use a tool suitable to seat the cup-type cylinder block core plug.
Seating Cup-Type Cylinder Block Core Plug. Scheme 383
Expansion-Type
- Use tool suitable to seat the expansion-type cylinder block core plug.
Seating Expansion-Type Cylinder Block Core Plug. Scheme 384
Scheme 385
Scheme 386
Scheme 387
Scheme 388
Scheme 389
Scheme 390
- 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 23: Identifying Spark Plug With Bridged Gap
- 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. (Scheme 381): Identifying Oil Fouled Spark Plug
- 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. Install new spark plugs. (Scheme 382): Identifying Spark Plug Carbon Fouling
- Inspect for normal burning. Check for light tan or gray deposits on the firing tip. see scheme 26: Identifying Normal Burning Spark Plug
- 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 27: Identifying Spark Plug With Pre-Ignition Condition
- Inspect for overheating, identified by white or light gray spots and with a 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. (Scheme 385): Identifying Overheated Spark Plug
- Inspect for fused deposits, identified by melted or spotty deposits resembling bubbles or blisters. These are caused by sudden acceleration. Install new spark plugs.
