Forester S F4-2.5L DOHC (1998)
Spark Plug: Service and Repair
Removal and Installation
CAUTION: All spark plugs installed on an engine, must be of the same heat range.
Spark plug:
NGK: PFR5B-11
Champion: RC10PYP4A
1. #1 SPARK PLUG
1) Disconnect battery ground cable.
2) Disconnect mass air flow sensor connector.
3) Remove four clips securing air cleaner upper cover.
4) Loosen the clamp screw and separate air cleaner upper cover from air intake duct.
5) Remove air cleaner element and air cleaner case.