Oxygen sensor threads

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09-05-2005, 10:13 AM

pdqtimetrialer

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Oxygen sensor threads

I have a '95 with a 4.9 and I'm replacing the oxygen sensor. The threads looked they've gotten damaged and I need to tap new threads into the exhaust pipe.

Does anyone know what size tap to use to cut new threads?

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09-05-2005, 11:08 AM

MustangGT221

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All of the o2 sensor bungs I've seen for these have a thread size of 18mm x 1.5.

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09-05-2005, 05:29 PM

pdqtimetrialer

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Thanks. I got a tap, cleaned out the threads, and the new sensor mounted perfectly.

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09-06-2005, 06:47 PM

MustangGT221

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Sweeeeeet!

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09-06-2005, 07:25 PM

4.6Ranger

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Also for those who dont know 18mm x 1.5 is the same size as a large spark plug.
A spark plug tap works great for cleaning up the threads in these things.

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