O2 sensor fitment/clearance question

N54Fiend · 10-02-2021, 10:00 AM

I’m getting close to the end of my pure turbo install, and have a quick question for you all about O2 sensor clearance.

My rear pre-cat O2 sensor is just a hair away from touching the coolant pipe where the sensor connects to the dp.

I’ve tried to loosen everything up and shift the dp enough to make clearance, that’s why it’s not currently touching… but this is all the room I can make.

I’ll put a link to an image below: (I’m on mobile, sorry)

View post on imgur.com

Do you guys think this is good to let rip, or should I keep working my butt off trying to make more clearance?

Unfortunately I didn’t decide to try to fix this until I had the subframe back up… I really don’t want to take it back down now.

Edit: just realized I put this on the wrong forum, I meant to be in N54.

N54Fiend · 10-02-2021, 10:02 AM

Forgot to mention, these are VRSF down pipes. I can’t help but notice the bung could have been placed just a little differently and I wouldn’t be fighting with this.

ferocity02 · 10-02-2021, 10:48 AM

It's probably fine. Check again when it's fully hot as the metal will expand. Then check every so often for wear marks. Maybe there are shorter sensors out there?

10-02-2021, 10:00 AM	#1
N54Fiend Professional idiot 17 Rep 167 Posts Drives: 2012 335is Join Date: Jun 2012 Location: Central FL iTrader: (1)	O2 sensor fitment/clearance question I’m getting close to the end of my pure turbo install, and have a quick question for you all about O2 sensor clearance. My rear pre-cat O2 sensor is just a hair away from touching the coolant pipe where the sensor connects to the dp. I’ve tried to loosen everything up and shift the dp enough to make clearance, that’s why it’s not currently touching… but this is all the room I can make. I’ll put a link to an image below: (I’m on mobile, sorry) View post on imgur.com Do you guys think this is good to let rip, or should I keep working my butt off trying to make more clearance? Unfortunately I didn’t decide to try to fix this until I had the subframe back up… I really don’t want to take it back down now. Edit: just realized I put this on the wrong forum, I meant to be in N54. __________________ 2009 E92 335i - Pure600, fueling, and FBO. Previous BMW E-Series Cars - 2008 135i, 2012 335is, 2013 135i Last edited by N54Fiend; 10-02-2021 at 01:26 PM..
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10-02-2021, 10:02 AM	#2
N54Fiend Professional idiot 17 Rep 167 Posts Drives: 2012 335is Join Date: Jun 2012 Location: Central FL iTrader: (1)	Forgot to mention, these are VRSF down pipes. I can’t help but notice the bung could have been placed just a little differently and I wouldn’t be fighting with this.
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10-02-2021, 10:48 AM	#3
ferocity02 Colonel 530 Rep 2,083 Posts Drives: 2013 135is Join Date: May 2014 Location: USA iTrader: (8)	It's probably fine. Check again when it's fully hot as the metal will expand. Then check every so often for wear marks. Maybe there are shorter sensors out there?
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