Stuck spark plug

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Tractor Rod
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Stuck spark plug

Postby Tractor Rod » Sat Feb 06, 2021 11:00 pm

I have a stuck spark plug in my cub and I’m wondering are there any tricks on how to get it out? It’s not broken but I think just rusted into the top of the head. I have tried spraying PB blaster while cold......letting it warm up and then spraying it again but to no avail, then the ole Coca Cola trick and still cannot get it to release. Any suggestions and tricks would be much appreciated. Thanks in advance.

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Re: Stuck spark plug

Postby Barnyard » Sat Feb 06, 2021 11:23 pm

Spraying will not work because the washer seals anything from penetrating. I have used an impact wrench on a very low setting and rattling it back and forth.
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Re: Stuck spark plug

Postby staninlowerAL » Sun Feb 07, 2021 5:22 pm

Worst luck scenario, I had a case where all 4 plugs were rusted off and unable to grip the remains with any tool. I removed the head and threaded the remains of the plugs from the opposite side, (don't remember what size) then installed a grade 8 bolt in the new threads. Soaking with PB Blaster and using impact wrench backed the remains of the plugs out. Hope yours does not require that extreme but it worked for me and saved the head. Good Luck!!!

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Re: Stuck spark plug

Postby tst » Sun Feb 07, 2021 5:33 pm

run the engine, get it hot then try it, make sure to use a 6 pt wrench or socket

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Re: Stuck spark plug

Postby Magnum » Sun Feb 07, 2021 10:53 pm

Don't forget to be patient.

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Re: Stuck spark plug

Postby outdoors4evr » Mon Feb 08, 2021 11:06 am

Get the engine hot and then spray the plug base down with Freeze-it.
Once the head is hot and the plug is cold, rattle on it with the impact as suggested above.
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Re: Stuck spark plug

Postby Nelson 634 » Mon Feb 08, 2021 3:37 pm

Be very careful using a temperature lowering product around a warm/hot cast metal. It is susceptible to cracking. Pull the hood, use a battery type impact driver. Short burst. First tighten, then loosen repeat until it breaks free. Use only short burst. As stated before use only six sided sockets. Good luck.

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