Spark plugs removal and reinstallation?

Tiny
GREENEYE656
  • MEMBER
  • 1997 FORD F-150
  • 4.6L
  • 250,000 MILES
Would it be a good idea to have swivels (at least two) and extensions to remove and replace these spark plugs?
Monday, January 6th, 2025 AT 1:12 PM

1 Reply

Tiny
CANNON1349
  • MECHANIC
  • 862 POSTS
Hello,

Personally, I use a spark plug socket with a swivel and internal magnet. The sockets with the rubber grommet will eventually get stuck on a plug. Plugs on this engine are fairly straight forward, I will show the detailed procedure below:

REMOVAL

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.
Use compressed air to remove any debris from the spark plug well before removing the spark plugs.

1. With a twisting, pulling motion disconnect the spark plug wire from the spark plug.

2. Squeeze the (A) locking tabs and disconnect the (B) spark plug wire from the (C) ignition coil.

3. Remove the RH spark plugs.

4. Remove the LH spark plugs.

5. Inspect the spark plugs for:
Deposits bridging spark plug gap (A).
Wet black deposits (oil fouling) (B).
Dry black deposits (carbon fouling) (C).
Overheating (D).
Deposits fused on spark plug (E).
Pre-ignition damage (F).
Normal spark plug (G).

INSTALLATION

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.

1. Apply Silicone Dielectric Compound D7AZ-19A331-A or equivalent meeting Ford specification ESE-M1C171-A to inside of spark plug wire boots.

2. Adjust the spark plug gap as required.

3. Install the LH spark plugs.

4. Install the RH spark plugs.

5. Connect the spark plug wires.

Let us know how it goes.
William
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Monday, January 6th, 2025 AT 5:06 PM

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