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Stuck spark plug
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- Cub Star
- Posts: 108
- Joined: Sun Dec 27, 2020 10:48 am
- Zip Code: 67357
Stuck spark plug
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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- Team Cub
- Posts: 24280
- Joined: Tue Aug 07, 2007 3:39 pm
- Zip Code: 45030
- Tractors Owned: At This Time
40 Farmall Cubs (Round Hood)
2 Farmall Cub (Square Hood)
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5 Lo-Boys (Round Hood)
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1 Ferguson 20
1 Cub Cadet 125
1 Kubota B-7100 - Circle of Safety: Y
- Location: OH, New Haven (Hamilton County)
Re: Stuck spark plug
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.
There are two ways to get enough Cubs. One is to continue to accumulate more and more. The other is to desire less.
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- 10+ Years
- Posts: 5009
- Joined: Fri Oct 29, 2010 11:34 pm
- Zip Code: 36558
- Tractors Owned: Cubs: (3)'49's, (1 is for parts), (1)'57 IH Cub LoBoy w/FH, (2)154 Number Series Loboys, (1 is for parts), '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '47 & '49 Avery V, '53 MM BG (offset), '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76? Yanmar 2TR15 1500 & Bush Hog SQ42S-2 mower, '78? FORD Dexta, '86 FORD LGT14D & 48" Mower, (2)Cub Cadets & Mowers (MTD), (4) Sears Surburban's, other MTD mowers, Jeeps & other misc. "treasures"
- Circle of Safety: Y
- Location: AL (Southwest)
Re: Stuck spark plug
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!!!
Stan in LA (lower AL)
USAF & Reserves, Reg ARMY, ARMY NG (AL)
USAF & Reserves, Reg ARMY, ARMY NG (AL)
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- 10+ Years
- Posts: 5235
- Joined: Tue Jan 12, 2010 2:08 pm
- Zip Code: 12514
- Circle of Safety: Y
Re: Stuck spark plug
run the engine, get it hot then try it, make sure to use a 6 pt wrench or socket
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- Cub Star!!
- Posts: 255
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Re: Stuck spark plug
Don't forget to be patient.
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- 10+ Years
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- Joined: Tue Jul 22, 2008 12:44 pm
- Zip Code: 48370
- Tractors Owned: 184
- Location: Oxford, MI
Re: Stuck spark plug
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.
Once the head is hot and the plug is cold, rattle on it with the impact as suggested above.
184 w/ Creeper & 3-Point
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade
IH 3160a Mower
IH Model 15 Tiller
IH-54 Blade
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- 5+ Years
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- Tractors Owned: 5 Cubs
1952 100
1960 460 Utility - Location: Central Va.
Re: Stuck spark plug
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.
Walter
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