Oil Filter Cap Leaking? (N20)

okayr · 10-04-2022, 05:11 PM

Had my car in for some hefty service and was advised I needed to replace a few things due to small leaks, but the OFHG was one they stressed. I had this done ~1yr/~11k miles ago so I was frustrated it was already leaking again. I think it might be the oil filter cap itself or maybe a faulty o-ring? I cleaned it up really nice yesterday and went for a long-ish drive today and this is what I saw.

Has anyone run into this? I've never had an o-ring have an issue, so I considered replacing the cap. Could this be the OFHG? It seems pretty clear it's coming from the cap.

pungo · 10-04-2022, 05:31 PM

Check cap torque, if ok, remove cap, inspect o-ring condition and for correct placement.

Wesasxm · 10-04-2022, 07:57 PM

O-ring put new one oiled before screw it

Opie55 · 10-05-2022, 10:05 AM

Not a great picture, but that big stain does not look fresh. Anyway, if that is indeed a leak, then it is not the OFHG. Maybe they put a kink/pinch in the o-ring when it was installed.

okayr · 10-15-2022, 04:17 PM

O-ring looked fine when removed with no visible punctures, and was sitting tight and flush. But finally got a new one installed, all is well!

10-04-2022, 05:11 PM	#1
okayr Private First Class 32 Rep 101 Posts Drives: 2014 BMW X3 xDrive28i Join Date: Feb 2021 Location: California iTrader: (0)	Oil Filter Cap Leaking? (N20) Had my car in for some hefty service and was advised I needed to replace a few things due to small leaks, but the OFHG was one they stressed. I had this done ~1yr/~11k miles ago so I was frustrated it was already leaking again. I think it might be the oil filter cap itself or maybe a faulty o-ring? I cleaned it up really nice yesterday and went for a long-ish drive today and this is what I saw. Has anyone run into this? I've never had an o-ring have an issue, so I considered replacing the cap. Could this be the OFHG? It seems pretty clear it's coming from the cap. Attached Images
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10-04-2022, 05:31 PM	#2
pungo Colonel 880 Rep 2,547 Posts Drives: Z4MC-X3-35i-525i, Corrado G60 Join Date: Nov 2007 Location: MD iTrader: (5) Garage List 2011 BMW X3 x35i [0.00] 2001 BMW 525i [0.00] 2007 BMW Z4 M Coupe [8.76]	Check cap torque, if ok, remove cap, inspect o-ring condition and for correct placement.
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10-04-2022, 07:57 PM	#3
Wesasxm New Member 0 Rep 16 Posts Drives: BMW X3 f25 2012 Join Date: Sep 2022 Location: Canada ,QC 🇨🇦 iTrader: (0)	O-ring put new one oiled before screw it
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10-05-2022, 10:05 AM	#4
Opie55 Colonel 1195 Rep 2,908 Posts Drives: '15 650i Convertible Join Date: Apr 2018 Location: US iTrader: (0)	Not a great picture, but that big stain does not look fresh. Anyway, if that is indeed a leak, then it is not the OFHG. Maybe they put a kink/pinch in the o-ring when it was installed.
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10-15-2022, 04:17 PM	#5
okayr Private First Class 32 Rep 101 Posts Drives: 2014 BMW X3 xDrive28i Join Date: Feb 2021 Location: California iTrader: (0)	O-ring looked fine when removed with no visible punctures, and was sitting tight and flush. But finally got a new one installed, all is well!
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