Thread: stuck spark plug

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Ihave a 1971 ford 390 pu no 4 plug will not unscrew Ihave soked it for over a week with pb blaster and stillcan not get to unscrew. what can i do without removing head Thanks for any info Larry

I've had luck by putting a socket ejust big enough to go over the ceramic part and rest on the shoulder. then with a relativly small ball pean, hit the top of the socket straight towardthe threaeds. use solid hits but don't get carried away.. the other trick I've seen with a stuck spark plug was to get the car up to operating temp, shut it off and remove it hot(ouch). theory being the hole will grow in diameter more then the plug. if that doesn't work get a chevy motor...j/k good luck

Spray the plug with ether (starting fluid). A warmed up engine works better, but it will work on a cold one too. That stuff gets cold!

If you have a DeWalt drill with a hammer setting try that. The light vibration may do the trick.

They make a new product called freeze off that may help.

Use heat if you can maybe a propane torch with an impact gun using low air pressure to do a steady tap tap tap in both directions. Do not use the full force of an impact because you will be sorry.

I'm guessing he either got it out or went somewhere else for help since he hasn't been back here since 2/14