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Old 12-21-2007, 16:58   #1 (permalink)
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confused Stripped spark plug

My wife was driving the 2001 crown vic today when she started hearing a banging noise. To make a long story short, one of the spark plugs blew. It took out the COP. The plug came out of its threads. I need to get the old threads out and retap it. Any suggestions? I have been looking at Helicoils, but am unsure what size. Help would be greatly appreciated.
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Old 12-24-2007, 15:38   #2 (permalink)
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Re: Stripped spark plug

Well after alot of surfing the net and other ford forums it appears that this is not to uncommon of a problem in the 4.6l and 5.4l engines. Which Ford says is not a engineering defect. But tell that to the hundreds if not thousands that have had a spark plug blow. I have decided to go with timesert kit #5553. It is not cheap but it is the least expensive option. This was a nice Christmas present. Thanks Ford.......
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Old 12-24-2007, 18:07   #3 (permalink)
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Re: Stripped spark plug

I've heard talk of the opposite problem on some vehicles, the plug gets siezed and breaks trying to remove. but I am unsure of what engines it normally happens to. Good luck and let us know how it goes for you.
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Old 12-27-2007, 07:47   #4 (permalink)
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Re: Stripped spark plug

If you have researched it, I am sure you know that the correct way to repair this is to helicoil for sure. From the inside (bottom) of the head. Pull the head, and insert the helicoil from the bottom so that it won't back out or spit the next plug you put in there. NOT FUNNY! I know of others that have done it from the top and it was fine.
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Old 12-30-2007, 14:54   #5 (permalink)
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biggrin Re: Stripped spark plug

What I have read is the helicoil repair won't last. Anyway got the Time-Sert kit on Saturday. Took me about 90 minutes to do the repair, and that was with me taking my time. It fired up without the plug popping out, which was a good thing. So far so good. I will report back in about a week and let you all know how it is going.
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Old 01-19-2008, 09:23   #6 (permalink)
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Re: Stripped spark plug


Just an update. So far so good. Luckly or not it was the #2 plug that went so it was easy to get to. The plug initially kept getting fouled, but after cleaning and then replacing she is running smoother.
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