Spark Plug Inspection (L12A/L13A)

Spark Plug Inspection

1.Inspect the electrodes and ceramic insulator.

Burned or worn electrodes may be caused by:

  • Advanced ignition timing
  • Loose spark plug
  • Plug heat range too hot
  • Insufficient cooling

Fouled plug may be caused by:

  • Retarded ignition timing
  • Oil in combustion chamber
  • Incorrect spark plug gap
  • Plug heat range too cold
  • Excessive idling/low speed running
  • Clogged air cleaner element
  • Deteriorated ignition coils

 

2.Check the electrode gap (A). If the gap is over the standard, adjust the gap with suitable gapping tool.

Electrode Gap:
Standard (New): 1.0-1.1 mm
(0.039-0.043 in.) 

 

3.Replace the plug at the specified interval, or if the center electrode is rounded (A). Use only the spark plugs listed below.

Spark Pluges:
 BKR 6E-11 (NGK) 
 K20PR-U11 (DENSO) 

 

4.Apply a small quantity of anti-seize compound to the plug threads, and screw the plugs into the cylinder head finger-tight. Then torque them to 18 N·m (1.8 kgf·m, 13 lbf·ft).