E 150 1/2 Ton Van V6-4.2L VIN 2 (1997)
4. Inspect the spark plugs for:
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Deposits bridging spark plug gap (A).
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Wet black deposits (oil fouling) (B).
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Dry black deposits (carbon fouling) (C).
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Overheating (D).
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Deposits fused on spark plug (E).
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Pre-ignition damage (F).
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Normal spark plug (G).
INSTALLATION
1. Apply Silicone Dielectric Compound D7AZ-19A331-A or equivalent meeting Ford specification ESE-M1C171A to the inside of the spark plug
wire boots.
NOTE: If an original spark plug is reused, make sure it is placed in the same cylinder it was taken from. Replacement spark plugs can be used in
any cylinder.
2. Adjust the spark plug gap as required.
