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Chase spark plug threads on 91 5.0

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Old Mar 5, 2020 | 03:24 AM
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Chase spark plug threads on 91 5.0
Anybody know the bit size to chase the spark plug hole threads on my 91 f150 5.0? Thx
 
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Old Mar 5, 2020 | 10:46 AM
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From: Joplin MO
M14 x 1.25
 
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Old Mar 5, 2020 | 01:11 PM
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I think I just slightly cross threaded a plug.
Was thinking about just chasing the threads to clean it up and give another try. Advisable?
 
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Old Mar 5, 2020 | 01:33 PM
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From: Joplin MO
Worth a try, but you may have to do a Timesert.
 
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