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Feb 11, 2011 | 02:53 PM

99shortbed

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plugs

Has any one had a problem with their 5.4 throwing a plug thru the head

Feb 11, 2011 | 02:58 PM

revhead347

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I've heard of it happening on a Mustang. The dealer claims that certain aftermarket plugs don't have enough thread to hold tight.

Kurt

Feb 11, 2011 | 03:07 PM

AFSOCSGT

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From: Navarre FL

Nope, second 5.4 I have owned.

Feb 11, 2011 | 03:17 PM

99shortbed

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Mines olny done it once but on of my friends has had it happen multiple times I thought I would cross thread the hole when I removed it but it worked fine

Feb 11, 2011 | 03:25 PM

AFSOCSGT

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From: Navarre FL

Yeah, I have heard the main cause is cross threading the hole. Doesn't help that the back plugs are a pain to get to.

Feb 11, 2011 | 06:19 PM

usmc_harper

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I always put the plug I. As far as I can by hand to ensure that it isn't cross threaded. You should get at least two complete turns by hand before you put the ratchet to it.

Feb 11, 2011 | 06:23 PM

revhead347

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The Ford dealership has a procedure for correcting the threads in the cylinder head since it such a common problem. It costs about $200 to get done.

Kurt

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