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06-16-2020, 08:50 PM | #1 |
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Oil leak? Makes no sense
Hi all! I have a 2010 135i N54 FBO stage 2+ turbos and I've been having trouble trying to figure out why my intercooler to cold chargepipe is leaking oil. I am running a catch can. All the other spots in the photo are previous leaks.
Best, Flynn
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06-22-2020, 03:00 PM | #2 |
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Drives: 2008 135i E88
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Did you upgrade your pcv? That is what I remember reading awhile back was someone's fix for oil leaking from intercooler/lower chargepipe are. Cant find the thread now.
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06-22-2020, 03:43 PM | #4 |
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The trans cooler isn't leaking and that's the only thing I could find. It's coming from the coupler
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06-23-2020, 05:12 PM | #5 |
BMW Fan
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Is the oil coming down from the oil filter head/oil cooler thermostat? That's a common leak point and lines up with your wet spot.
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2012 135i Mods: air scoops, CP, K&N filter, PS1, ADE FMIC, BMW PE, JB4, 1M front body, full M3 suspension front and rear, M3 brakes front and rear, M3 rear subframe and LSD
Owned so far: 88 M3 x 2, 95 325is, 95 M3 x 2, 06 Mini Cooper S, 08 335 xi, 09 Z4 35i, 01 M3, 12 135i |
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07-21-2020, 03:41 PM | #7 |
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Oil filter housing gasket or oil cooler gasket would be my bet. The filter housing gasket can be a sneaky leak (was on my car). If it turns out to be either of those replace ASAP because that oil will spray all over your belt and engine. Dangerous and messy!
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07-21-2020, 07:36 PM | #8 |
C2H5OH
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It's the turbo blowing oil into the intercooler.
The spater you see there is from a small boost leak. The endtanks aren't round (china shit). The clamp has a hard time forming to a non-round surface. Ideally the silicon coupler should fill the gap, and it will to a point. The only solution I'd found was the clamp had to be as far back as possible, just after the bead; and really crank down on the T-Bolt. It should bite into the coupler. Constant Tension clamps would be better though. On the turbos blowing oil into the cooler, just keep an eye on oil consumption. Mine lasted quite a while blowing a little oil ... at 30psi. |
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