Spark Plug: Service and Repair

Changing Spark Plugs (Platinum-tipped type)




1. Disconnect ignition wires from spark plugs at boot. Do not pull on the wire.

Spark Plug:

2. Remove spark plugs with spark plug socket.

Gap (Nominal): 1.1 mm (0.043 in)

Use standard type spark plug for normal condition.
The hot type spark plug is suitable when fouling occurs with the standard type spark plug under conditions such as:

- frequent engine starts
- low ambient temperatures

The cold type spark plug is suitable when spark knock occurs with the standard type spark plug under conditions such as:

- extended highway driving
- frequent high engine revolution




- Do not use a wire brush for cleaning.
- If plug tip is covered with carbon, spark plug cleaner may be used.

Cleaner air pressure:
Less than 588 kPa (6 kg/sq.cm, 85 psi)

Cleaning time:
Less than 20 seconds




- Checking and adjusting plug gap is not required between change intervals.

3. Install spark plugs. Reconnect ignition wires according to numbers indicated on them.

Spark plug:
Tightening Torque : 20 - 29 N.m (2.0 - 3.0 kg-m, 14-22 ft-lb)

Changing Spark Plugs (Conventional type)




1. Disconnect ignition wires from spark plugs at boot. Do not pull on the wire.

Spark Plug:

2. Remove spark plugs with spark plug socket.
Use standard type spark plug for normal condition.
The hot type spark plug is suitable when fouling occurs with the standard type spark plug under conditions such as:
- frequent engine starts
- low ambient temperatures

The cold type spark plug is suitable when spark knock occurs with the standard type spark plug under conditions such as:
- extended highway driving
- frequent high engine revolution




3. Check plug gap of each new spark plug.

Gap: 0.8 - 0.9 mm (0.031 - 0.035 in)

- Use a wire brush for cleaning, if necessary.

4. Install spark plugs. Reconnect ignition wires according to numbers indicated on them. Spark plug:

Tightening Torque : 20 - 29 N.m (2.0 - 3.0 kg-m, 14-22 ft-lb)