O2 sensor leak - BMW G310 R/GS Forum
 
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post #1 of 6 (permalink) Old 12-10-2019, 01:29 PM Thread Starter
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O2 sensor leak

I got white smoke coming up from the o2 sensor connected to the exhaust. Smells kinda bad. Not sure if it's a loose washer or something worse. First started after a week of rain left it out no cover.
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post #2 of 6 (permalink) Old 12-10-2019, 11:02 PM
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Did you try to snug it down?

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post #3 of 6 (permalink) Old 12-10-2019, 11:34 PM Thread Starter
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Yeah. I tried to get a wrench up in there but it was tough. Thing wouldn't budge either way. I'm not sure if it's a leak or if something is burning. Smells kinda like rubber burning. White smoke coming up not sure exactly where but around the o2 sensor.
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post #4 of 6 (permalink) Old 12-11-2019, 04:07 AM
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that o2 sensor is torqued up pretty tight. [or should be]
perhaps something from the road might have got kicked up onto the exhaust.?
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post #5 of 6 (permalink) Old 12-11-2019, 01:54 PM Thread Starter
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I think that's more likely. The washer did feel pretty tight. It's more probable that there's something in the exhaust that's burning, although why it would be coming from the O2 sensor area I don't know. Is it safe to ride? Should I take it to the shop? I'm not experienced mechanically. Thank you all this has been very helpful.
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post #6 of 6 (permalink) Old 12-11-2019, 08:00 PM
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Originally Posted by CaliBikeNoob View Post
I think that's more likely. The washer did feel pretty tight. It's more probable that there's something in the exhaust that's burning, although why it would be coming from the O2 sensor area I don't know. Is it safe to ride? Should I take it to the shop? I'm not experienced mechanically. Thank you all this has been very helpful.
It is safe to ride, but needs to be fixed. you can just change the washer. for instance, any copper washer of the right size will work. also make sure that the 2 nuts in the exhaust are tight. additionally, check if there is no oil leak somewhere and oil is burning on the exhaust header pipe. if it is white smoke, it is oil burning. if the sensor was leaking, it would be black smoke. if some moisture gathers in the exhaust, there could be white vapor coming out when you start the bike, but this should disappear after a few min.

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Last edited by Kris; 12-11-2019 at 08:03 PM.
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