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#4760355 - 05/17/18 08:43 PM PB Blaster and stuck spark plug, fixed
sprite1741 Offline


Registered: 05/02/05
Posts: 434
Loc: Idaho
Had a stuck plug on number 2 on the 2.2 aluminum head. I knew it was not over torqued since I installed it with never seize and I just snug them up. Not sure what happened but it would unscrew about a quarter a turn and stop. Hit it with PB blaster and slowly worked back and forth with added blaster. Took about an hour letting it sit, working it again and again. It came out and the threads are fine. Just an FYI for anyone this happens to. Don't panic and think the worse. Cold engine, no heat. All the others were fine.
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#4760380 - 05/17/18 08:57 PM Re: PB Blaster and stuck spark plug, fixed [Re: sprite1741]
ARB1977 Offline


Registered: 06/12/05
Posts: 5134
Loc: North Texas
Sweet. I always think the worse. Glad it worked out for you.
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#4760387 - 05/17/18 09:01 PM Re: PB Blaster and stuck spark plug, fixed [Re: sprite1741]
spasm3 Offline


Registered: 05/30/10
Posts: 8526
Loc: North Carolina
Back and forth is the key. Probably carbon on the exposed threads. Back and forth knocks the carbon loose a bit at a time and avoids stripping the threads.

Good job!
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#4760391 - 05/17/18 09:06 PM Re: PB Blaster and stuck spark plug, fixed [Re: sprite1741]
WyrTwister Offline


Registered: 01/13/13
Posts: 1338
Loc: Texas
That makes sense .

Congrats on the win ! :-)
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#4760400 - 05/17/18 09:12 PM Re: PB Blaster and stuck spark plug, fixed [Re: sprite1741]
JamesBond Offline


Registered: 12/13/06
Posts: 840
Loc: midwest
Did the pb-blaster go down past the plug? Good job getting it out.

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#4760415 - 05/17/18 09:26 PM Re: PB Blaster and stuck spark plug, fixed [Re: sprite1741]
Chris142 Offline


Registered: 06/05/03
Posts: 16676
Loc: Deplorable in apple valley, ca
What brand was the plug?
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#4760442 - 05/17/18 10:03 PM Re: PB Blaster and stuck spark plug, fixed [Re: JamesBond]
sprite1741 Offline


Registered: 05/02/05
Posts: 434
Loc: Idaho
Originally Posted By: JamesBond
Did the pb-blaster go down past the plug? Good job getting it out.

Yes it did, the top of the piston was very wet. I used a lot of blaster. I put a piece of paper towel taped to a dowel and soaked it up. Wanted to make sure it was PB and not coolant.
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#4760501 - 05/18/18 12:05 AM Re: PB Blaster and stuck spark plug, fixed [Re: sprite1741]
oldhp Offline


Registered: 06/28/12
Posts: 1585
Loc: USA
Or let the engine cool over night. Next morning start the engine and pour MMO into TB, PCV etc. Shut it off and let it sit. Now the MMO, PB-Blaster etc is on the inside threads of the plug soaking the carbon loose.
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#4760680 - 05/18/18 08:16 AM Re: PB Blaster and stuck spark plug, fixed [Re: sprite1741]
andyd Offline


Registered: 09/25/04
Posts: 6996
Loc: Marshfield , MA
The back and forth in increasing arcs is SOP for any stuck bolt. The motion forces the lube further down the threads.
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#4760731 - 05/18/18 08:50 AM Re: PB Blaster and stuck spark plug, fixed [Re: andyd]
sprite1741 Offline


Registered: 05/02/05
Posts: 434
Loc: Idaho
Originally Posted By: andyd
The back and forth in increasing arcs is SOP for any stuck bolt. The motion forces the lube further down the threads.

Yes, I took it slow and didn't try to force it. 32 year old aluminum heads and steel plug. First time this ever happened. I had those plugs out 3 years ago. The plug didn't look fouled so still a mystery why just one, but it's an old engine. The threads were really gunked up, black carbon and anti-seize. Maybe I used too much. Anyway I cleaned up everything and installed new plugs, wires, cap and rotor. All good.
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#4760744 - 05/18/18 08:59 AM Re: PB Blaster and stuck spark plug, fixed [Re: sprite1741]
Kira Offline


Registered: 08/19/10
Posts: 5051
Loc: Champlain/Hudson Valley
As stated, lube and go back and forth as necessary. Be kind to your machine and forget rushing any "nothing job".

To oldhp: If your process works, GREAT. It seemed a little involved to me as I don't think the MMO would cooperate so effectively.
My guess is that it'd just burn off like fuel:air mixture would.

Cheers,

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#4760763 - 05/18/18 09:08 AM Re: PB Blaster and stuck spark plug, fixed [Re: sprite1741]
Bluestream Offline


Registered: 09/13/03
Posts: 5757
Loc: Waterloo, ON


Edited by Bluestream (05/18/18 09:08 AM)
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