Legacy L Wagon AWD F4-2.2L SOHC (1997)
Spark Plug: Testing and Inspection
REMOVAL AND INSTALLATION
CAUTION: All spark plugs installed on an engine, must be of the same heat range.
Spark Plugs: Champion: R1OYC4
(Alternates): NGK: BKR6E-11, Nippondenso: K2OPR-U1, Champion: RC8YC4
1. Remove spark plug cords by pulling boot, not cord.
2. Remove spark plugs.
3. When installing spark plugs on cylinder head, use spark plug wrench.
Torque: 20.6 ± 2.9 N.m (15.19 ± 2.14 ft-lb)
CAUTION: The above torque should be only applied to new spark plugs without oil on their threads. If the threads are lubricated, the
torque should be reduced by approximately 1/3 of the specified torque in order to avoid over-stressing.
4. Connect Spark Plug cords.
INSPECTION
Check electrodes and inner and outer porcelain of plugs, noting the type of deposits and the degree of electrode erosion.
1. Normal.
Brown to grayish-tan deposits and slight electrode wear indicate correct spark plug heat range.
2. Carbon Fouled.
Dry fluffy carbon deposits on insulator and electrode are mostly caused by slow speed driving in city, weak ignition, too rich a fuel mixture, dirty
air cleaner, etc. It is advisable to replace with plugs having hotter heat range.
