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Broken Spark Plug

Tiny
DSGJOE
  • MEMBER
  • FORD F-350
1996 Ford F350 460/7.5 4x4. I have broken the spark plug off. All that remain in the head are the threads. I have lightly taped a screw extractor in and have broken a half inch socket trying to get it to budge. I have sprayed liquid wrench to let it set overnight. Is it OK to use heat or will that ruin the head.

Thanks joe
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Saturday, June 2nd, 2007 AT 6:36 PM

3 Replies

Tiny
98RANGERXLT
  • MECHANIC
  • 301 POSTS
You might have to remove the head.
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Saturday, June 2nd, 2007 AT 7:37 PM
Tiny
RUDPRO
  • MECHANIC
  • 224 POSTS
One trick I've used before is to apply heat around the plug, then squirt some penetrating oil. This makes it easier for the oil to penetrate the threads. Heat it for a minute or so. Make sure there is no wiring or anything near it. You may have to do this several times. It takes about 20 minutes for penetrating oil to get in there good.
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Saturday, June 2nd, 2007 AT 9:05 PM
Tiny
INDYUKE
  • MECHANIC
  • 416 POSTS
The dealership has a tool that will remove it. 1999 to 2004 trucks with the 5.4 have this problem bad, so ford came up with a tool to remove broken spark plugs. Unfortunately you'll have to pay dealer rates, so try rudpro's advice first.
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Sunday, June 10th, 2007 AT 2:03 AM

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