Spark Plug: Description and Operation

The engine uses resistor type spark plugs. Remove the spark plugs and examine them for burned electrodes and fouled, cracked or broken porcelain insulators. Keep plugs arranged in the order in which they were removed from the engine. An isolated plug displaying an abnormal condition indicates that a problem exists in the corresponding cylinder.

Fig.2 Checking Spark Plug Electrode Gap:

Spark plugs that have low mileage may be cleaned and reused if not otherwise defective. Adjust the gap between the electrodes to the dimensions specified in the chart by bending the ground electrode just above the attachment weld) with the appropriate tool.

Never apply any force between the electrode or damage to the center electrode assembly will result.

WARNING: The tapered seat plugs for this application are torque-critical! It is imperative that 17.6 Nm ± 2 (13 ± 2 ft. lbs.) is NOT exceeded!

Always tighten spark plugs to the specified torque. Over tightening can cause distortion and damage.Tighten spark plugs to 17.6 ± 2 Nm (13 ± 2 ft. lbs.) torque.