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Old Apr 4, 2012 | 10:52 AM
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rustywheel68's Avatar
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spark plug adapter?

oddball question-

a buddy of mine brought home a '65 pickup with a FE in it.

he's not a ford guy (yet), so he called me up. he says the #5 spark plug is screwed into some sort of adapter, and the adapter fits into the cylinder head.

the adapter has a small hole in the end near the electrode, and the whole thing spaces the plug about 1/2" farther out from where it would usually sit.

i was thinking it must be some sort of situation with bad threads in the head...but he says they look good.

i'm trying to get him to send me a picture so i can post it...but is anyone familiar with what this might be?
 
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Old Apr 4, 2012 | 10:56 AM
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From: Lost
Most likely a "non-fouler" on that plug. Those match the description given.
 
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Old Apr 4, 2012 | 10:57 AM
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From: Paradise Found!
It's most likely an adapter that prevents sparkplug fouling. I've seen them used before to stop plugs from fouling with oil...........
 
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Old Apr 4, 2012 | 11:45 AM
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aha...
so...seeing one of these would not be a good sign, correct?
 
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Old Apr 4, 2012 | 11:49 AM
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Correct. Most of the time it points to a broken ring or scored cylinder in that "hole" that causes oil or carbon fouling. Try a compression test, or better yet, a leakdown test on that cyl.
 
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Old Apr 4, 2012 | 11:51 AM
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argh- that's what i was afraid of.

thanks for the info guys!
 
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Old Apr 4, 2012 | 11:52 AM
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Finding one in use on a rear cyl can indicate a plugged oil drain hole. Any other location usually points to something a bit more involved to correct...... Even if it's just valve stem seals.
 
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