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Old 04-20-2005, 01:22 PM   #1
offset
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Join Date: Feb 2003
Chapter/Region: MWSOC
Location: Dayton, OH
Vehicle:
2004 Impreza STi
Silver/Silver

Default Damaged threads on my Wideband O2

I am wondering if anyone happens to know off the top of their head what size tap and die is for an O2 sensor. I think the bung on my midpipe isn't threaded deep enough which caused the first couple threads on my O2 sensor to get smashed. Someone else looked at it and thought that I might be able to get it straightened back out with a die. So I am hoping I can straighten out the threads and then tap the bung a little deeper.

TIA,
offset
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Old 04-20-2005, 01:26 PM   #2
crazymikie
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I'm not positive, but I think it's m18x1.5

Mike
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Old 04-20-2005, 03:15 PM   #3
gu5
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Offset the thread size is m18x1.5 just had to replace my sensor boss on my megan headers the sensor blew out under boost the thread is the same for the rear 02 sensor as well.
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Old 04-20-2005, 04:39 PM   #4
offset
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Thanks for the info guys. It does look like that is just what I needed. Now I am off to buy, better yet borrow, a die and tap to get back to tuning.

Thanks Again!!
offset
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Old 04-20-2005, 09:17 PM   #5
ride5000
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it also happens to be a common spark plug thread dia. and pitch, which may come in handy.
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