1. INSPECT FINS BLOCKAGE

(a) If the fins are clogged, wash them with water or a steam cleaner. Dry with compressed air.
NOTICE: If the distance between the steam cleaner and the core is too close, the fins may become damaged.
Keep the following injection distance.
Standard:

ComponentsKnock sensor (3MZ-FE)
REPLACEMENT
1. DISCHARGE FUEL SYSTEM PRESSURE (See page 11-35 )
2. DRAIN ENGINE COOLANT (See page 16-26 )
3. REMOVE V-BANK COVER SUB-ASSY (See page 14-149 )
4. REMOVE AIR CLEANER CAP SUB-ASSY (See page 14-149 )
5. REMOVE EMISSION CONTROL VALVE SET (See page 14-149 )
6. REMOVE INTAKE AIR SURGE ...