Spark Plug Repair Procedures

Inspection

[Vehicle Check]

1. 1
   Run the engine at approximately 3000 rpm for more than 3 minutes.
2. 2
   Remove the spark plug.
3. 3
   Visually inspect the spark plug wire. If the electrode is dry, the spark plug is normal. If the electrode is wet, check for damage and electrode gap as shown below.

[Component Inspection]

1. 1
   Check the spark plug thread and insulator for damage. If damaged, replace the spark plug.
2. 2
   Check the electrode. Measure the insulation resistance using an ohmmeter. If the resistance is lower than specified, adjust the electrode gap.

   Specification: 10 MΩ or more

   

3. 3
   Check the spark plug electrode gap. If the gap is greater than the maximum value, replace the spark plug.

   Specification: 0.7 ~ 0.8 mm (0.028 ~ 0.031 in.)

   

CLEANING

[Method 1]

1. 1
   Start the engine and let it idle for 2 minutes.
2. 2
   Depress the accelerator pedal and hold the engine speed at 4500 rpm with the shift lever in the N position to warm up the engine until the coolant temperature reaches 80°C.
3. 3
   Maintain 2500~3000 rpm in the N position for 15 minutes.

   

[Method 2]

1. 1
   Start the engine and let it idle for 2 minutes.
2. 2
   Drive the vehicle for more than 20 minutes while maintaining engine speed above 3500 rpm.

   

DEPOSIT

1. 1
   Remove the ignition coil. (Refer to Ignition System – Ignition Coil)
2. 2
   Remove the spark plug (A) using a spark plug wrench.

   

REMEDY

1. To install, perform the removal procedure in reverse order.

   Tightening Torque: 14.7 – 24 N·m