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air injection plugs, are they 1/4 npt? 93 f150

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jjona5
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Joined: Tue May 10, 2016 10:49 am

air injection plugs, are they 1/4 npt? 93 f150

Post #1 by jjona5 » Sat Aug 27, 2016 8:56 pm

Is that the correct plug?

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bubba22349
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Location: Flagstaff, Az. 86005 near the old Route 66

Re: air injection plugs, are they 1/4 npt? 93 f150

Post #2 by bubba22349 » Sat Aug 27, 2016 9:34 pm

No they are a tubing thread a much finer or more threads per inch than NPT. Good luck :nod:
A bad day Drag Racing is still better than a good day at work!

I am still hunting for a project car to build but with my current low budget it's not looking so good. My Ex- Fleet of Sixes these are all long gone! :bang: 1954 Customline 223 3 speed with O/D, 1963 Fairlane project drag car with BB6, 1977 Maverick 250 with C4, 1994 F-150 a 300 with 5 speed.

autoX65
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Re: air injection plugs, are they 1/4 npt? 93 f150

Post #3 by autoX65 » Wed Sep 14, 2016 1:34 am

Ya those a not a easy thread either...I had to swap I n of these and removed one set and had a pipe twist and break of course so id recommend three days soaking in deep creep sea foam penetrating lube.

The one from the swap was a little bend too and took some time to thread...

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