4.0 sparkplug change - Jeep Wrangler Forum

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Old 09-26-2012, 03:52 PM
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4.0 sparkplug change

I want tune up Distrib-wires- change plugs in my daughters 1998-4.0 straight 6. Since the jeeps not here to see at the moment, if I remember right- is the first spark plug (closest to the front) blocked by the ac compressor? I just remember seeing it and thinking theres no easy way to get to it.
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Old 09-26-2012, 04:21 PM   #2
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That particular plug is not right out in the open but it's still easily changed. Just use a 3/8" ratchet drive, an 8" or so 3/8" extension, and a wobble-joint between the spark plug socket and extension and you can snake the socket down through the bracket and onto the spark plug.

The spark plug wiring boot may be a little tough to get off where that particular plug is concerned. I started using a set of spark plug ignition wire pliers there and they made getting that particular plug's boot off much easier.
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