2019 Mustang GT Stuck Spark Plug

[Punchingclowns]

My plugs have a little over 5000 miles, some of that is the break in from the RPG engine and it has a ProCharger.

I figured I would toss in some new plugs.

To my surprise , Number 3 won't budge. The one with the old style plug wire from the coil pack. I haven't went nuts with pressure but I put more on it than I ever have.

Using a plug socket a 6 inch ext and a 2 inch ext. Having to with the tight turn.

Any advice?

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[BluePonyGT]

This is why some folks put a tiny bit of anti-seize on the threads of their plugs. It happens from time to time, but usually it's just your angle of attack on some of these plugs. A wobble fitting, or elbow fitting, plus a random combination of extensions can often give you the leverage you need. However, you do NOT want to break it.

First, I don' t know if anyone else have done this, but I try to remove/replace plugs when the engine is marginally hot for just this reason. I know toasting your hands and wrists sucks, but that may be the way to get tough plugs out before the metal contracts as it cools.

Finally, as a last resort I would shoot a tiny (and I mean TINY) bit of liquid wrench in there with the engine cold and let it sit for a bit. Then I'd use a blue paper shop towel, and an extension, and jam it in there to dry things off. Then try it. Don't get impatient.

 

[Cory S]

Tapered seat plugs are also easily over torqued in aluminum cylinder heads. Follow advice above.

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