IG–22 IGNITION SYSTEM – (2JZ–GTE) SPARK PLUGS INSPECTION NOTICE: • Never use a wire brush for cleaning. • Never attempt to adjust the electrode gap on used a spark plug. • Spark plugs should be replaced every 100,000 km (60,000 miles). 1. REMOVE IGNITION COILS ASSEMBLIES (See ignition coils removal) 2. INSPECT ELECTRODE Using a megger (insulation resistance meter), measure the insulation resistance. Standard correct insulation resistance: 10 M Ω or more If the resistance is less than specified, proceed to step 4. HINT: If a megger is not available, the following simple method of inspection provides fairly accurate results. Megger M Ω Ground IG0147 Simple Method: (a) Quickly race the engine 5 times to 4,000 rpm. (b) Remove the spark plug. (c) Visually check the spark plug. If the electrode is dry...OK If the electrode is wet...Proceed to step 4 (d) Reinstall the spark plug. N00917 3. REMOVE SPARK PLUGS I61451 4. VISUALLY INSPECT SPARK PLUGS Check the spark plug for thread damage and insulator damage. If abnormal, replace the spark plug. Recommended spark plug: ND PK20R11 NGK BKR6EP11 5. INSPECT ELECTRODE GAP Maximum electrode gap for used spark plug: 1.3 mm (0.051 in.) Correct electrode gap for new spark plug: 1.1 mm (0.043 in.) NOTICE: If adjusting the gap of a new spark plug, bend only the base of the ground electrode. Do not touch the tip. Never attempt to adjust the gap on the used plug. 1.1 mm IG0317 IG0151 Z00072