F 150 2WD Pickup V6-4.2L VIN 2 (1997)
presence of carbon deposits.
CAUTION
DO NOT BUMP THE ENGINE WITH THE BORESCOPE IN THE SPARK PLUG HOLE OR ATTEMPT TO VIEW THE VALVE WHILE
ROTATING THE ENGiNE. THIS MAY RESULT IN BORESCOPE OR ENGINE DAMAGE.
CAUTION
DO NOT POWER THE BORESCOPE LIGHT SOURCE FROM A CAR BATTERY WHILE IT IS UNDER CHARGE. FOR EXAMPLE, IF THE
ENGINE IS RUNNING, THE LAMP MAY FAIL.
3.
Compare the deposits with the Intake Valve Deposit Rating System Chart (Figure 1).
