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Go Back   E46Fanatics > Tuning & Tech > Suspension & Braking

Suspension & Braking
Have some questions about suspension or brake setups for your E46 BMW? Get all your answers here!

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Old 03-01-2013, 08:28 PM   #1
330iBlue
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Brake oil leak???

Proud to say I changed pads and rotor for the first time ever. I did the driver side first, then the passenger. While I had passenger side up, I notice a small puddle of light color oil on the driver side under the fuel filter. It was very clear, so I am pretty sure it was brake oil. The oil level is normal and the brakes work fine. Is it possible that when I pressed the caliper piston back in, I caused some sort of back flow. Is that possible???
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Old 03-01-2013, 08:50 PM   #2
lcoleman
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Yes, but it comes out the reservoir when that happens. Get under the car and inspect for leaks... it's just a hard metal line(s) in that area. Keep an eye on your brake fluid, too, of course.
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Old 03-01-2013, 09:11 PM   #3
dmax
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Look in the area below brake fluid reservoir. If you spilled brake fluid, you should rinse it off...it's very corrosive to paint...probably other things too.

But, I wouldn't be surprised if it's not brake fluid...or if it is, maybe you just spilled some.

If it's possibly coming from a brake line, you should inspect thoroughly.

I haven't read of one brake line ever going bad here. Only guys replacing them seem to be tracking the car.

Anyway, doublecheck everything. If you're not sure still, just ask a neighbor of yours casually if he'd like to try driving your car.
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Old 03-01-2013, 09:44 PM   #4
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I think it is coming from the reservoir. The top seems to be wet like it was over filled with out me adding any. I drove around and feels ok. I will keep an eye on level. Thanks guys.
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Old 03-01-2013, 10:03 PM   #5
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When you push the piston in with new pad, it pushes the fluid up. Clean up the spills off the paint.
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Old 03-01-2013, 10:12 PM   #6
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Quote:
Originally Posted by dmax View Post
When you push the piston in with new pad, it pushes the fluid up. Clean up the spills off the paint.
Yup. That one thing to be very aware of: brake fluid will absolutely 100% ruin your paint.
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