Spark Plugs - Honda 1990 Accord Sedan Owner's Manual

Spark plugs should be replaced every 24 months or 30,000
miles (48,000 km), whichever comes first.
Recommended spark plugs:
ZFR5F-11 (NGK), KJ16CR-L11 (ND)
(for all normal driving)
ZFR6F-11 (NGK), KJ20CR-L11 (ND)
(for hot climates or continuous high speed driving)
Keep hands away from the radiator fan. The fan
may start automatically without warning and run for up to 15
minutes, even after the engine is turned off.
CAUTION: Never use spark plugs with an improper heat
range; they will adversely affect engine performance and
durability.
Replace plugs one at a time, so you don't get the wires mixed
up.
1. Clean any dirt from around the spark plug base.
2. Disconnect the plug cap, then remove and discard the old
plug.
3. Check the gap of the new spark plug before installation.
Plug gap should be 1.1 mm (0.04 in).
4. Thread the new spark plug in by hand to prevent cross-
threading.
5. After the plug seats against the cylinder head, tighten 1/2
turn with a spark plug wrench to compress the washer.
6. Reinstall the spark plug cap.
CAUTION: The spark plugs must be securely tightened, but
not overtightened. A plug that's too loose can get very hot and
possibly damage the engine; one that's too tight could damage
the threads in the cylinder head.
Thread in by hand

Spark Plugs

PLUG CAP