O2 Sensor stripped
O2 Sensor stripped
I was taking my Jackpot stainless header off today to have it ceramic coated during the week. Rear O2 sensor was givign me hell so I heated it up...no go. Used some penetrating oil, let it sit a few hours...no go. Then tried wax and got it to come out....BUT...the threads are stripped and galled on the sensor. The threads in the bung look ok but maybe a little dirty.
Does anyone know what size the large sensors threads are so I can go buy a die for the bung tomorrow? I figure that I already have to go buy a new o2 sensor so the cheap price I am getting on the coating is going to now negated by the sensor.
Does anyone know what size the large sensors threads are so I can go buy a die for the bung tomorrow? I figure that I already have to go buy a new o2 sensor so the cheap price I am getting on the coating is going to now negated by the sensor.
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
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From: Phoenix '53, '88, '09 Big Twins
when you reinstall- antiseize paste.
use the good sensor to check the threads in the header, first cheap them up with a wire brush
if that checks, then all you need is a new sensor to replace the stripped one.
mike
use the good sensor to check the threads in the header, first cheap them up with a wire brush
if that checks, then all you need is a new sensor to replace the stripped one.
mike
Tourer
Joined: Apr 2014
Posts: 420
Likes: 2
From: Bradenton,Florida
If the threads in the bung are too stripped, you can install a Heli-coil. If the threads on the sensor are bad, you can buy one from H-D. The sensors are 12mm
Last edited by Melman; Aug 4, 2014 at 12:11 PM.
Road Master
Joined: May 2014
Posts: 881
Likes: 2
From: Madison, AL
He has an FM header which comes with both 12mm and 18mm bungs. Since he specified the large bung I'm assuming he is running the 18mm sensors. I think I would just call FM and ask them.
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Tourer
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Just talked to Travis at FM. The threads are a standard O2 sensor 18mm with 1.5 thread pitch.
Dropped the header off at the coater and will call them in a few minutes to see if they have the right tap. I didnt think about it but they place a plug in the hole and they clean the threads after coating. SO I might be ok other than having to purchase a new O2 sensor.
Dropped the header off at the coater and will call them in a few minutes to see if they have the right tap. I didnt think about it but they place a plug in the hole and they clean the threads after coating. SO I might be ok other than having to purchase a new O2 sensor.
