CAUTION
- Wear working clothing, including a cap, protective goggles, and protective shoes during operation.
- Remove contamination including dirt and corrosion before removal, installation or disassembly.
- Keep the disassembled parts in order and protect them from dust or dirt.
- Before removal, installation or disassembly, be sure to clarify the failure. Avoid unnecessary removal, installation, disassembly, and replacement.
- Be careful not to burn your hands, because each part on the vehicle is hot after running.
- Be sure to tighten fasteners including bolts and nuts to the specified torque.
- Place shop jacks or safety stands at the specified points.
- Before disconnecting electrical connectors of sensors or units, be sure to disconnect the negative terminal from battery.
RH SIDE
- Install in the reverse order of removal.
- Tightening torque (Spark plug): 21 N.m (2.1 kgf-m, 15 ft-lb)
- Tightening torque (Ignition coil): 16 N.m (1.63 kgf-m, 11.8 ft-lb)
| CAUTION | The above torque should be only applied to new spark plugs without oil on their threads. In case their threads are lubricated, the torque should be reduced by approximately 1/3 of the specified torque in order to avoid over-stressing. |
LH SIDE
- Install in the reverse order of removal.
- Tightening torque (Spark plug): 21 N.m (2.1 kgf-m, 15 ft-lb)
- Tightening torque (Ignition coil): 16 N.m (1.63 kgf-m, 11.8 ft-lb)
| CAUTION | The above torque should be only applied to new spark plugs without oil on their threads. In case their threads are lubricated, the torque should be reduced by approximately 1/3 of the specified torque in order to avoid over-stressing. |
NORMAL
Brown to grayish-tan deposits and slight electrode wear indicate correct spark plug heat range.
Scheme 37
CARBON FOULED
Dry fluffy carbon deposits on insulator and electrode are mostly caused by slow speed driving in city, weak ignition, too rich fuel mixture, dirty air cleaner, etc.
It is advisable to replace with plugs having hotter heat range.
Scheme 38
OIL FOULED
Wet black deposits show excessive oil entrance into combustion chamber through worn rings and pistons or excessive clearance between valve guides and stems. If the same condition remains after repair, use a hotter plug.
Scheme 39
OVERHEATING
White or light gray insulator with black or gray brown spots and bluish burnt electrodes indicate engine overheating. Moreover, the appearance results from incorrect ignition timing, loose spark plugs, wrong selection of fuel, hotter range plug, etc. It is advisable to replace with plugs having colder heat range.
