Fluid Leak During Brake Pad/Rotor Refresh

E93Dude · 04-05-2021, 10:11 PM

Replaced front rotors/pads over the weekend. I was almost done when I noticed a fluid spot under driver side door/front corner panel joint. Am baffled. Any thoughts on the source? Am including photo of where I believe the leak came through the underhood shield. I believe it was oil, but not sure.

Brake fluid replaced 30K ago, so it shoudn't be that color anyway. I checked the brake fluid reservoir, and no fluid appears to have leaked out when I compressed the calipers to get the new pads in. I wonder if I have some other mystery leak that had been pooling for some time on the underhood shield. I did the OFHG and VCG a few months ago, and do not believe either are leaking.

Yes, I know my jack pads are mangled and my inspection is expired. I have replacements, and a new jackpad adapter....

bluewater328 · 04-05-2021, 11:11 PM

Looks like oil. Hard to say without some other clues.

Pull the bottom tray and take a look around. Check your pan (and drain plug). Then re-inspect VCG, OFHG. Also check Vanos. But basically, look for oil traces and follow the trail.

04-05-2021, 10:11 PM	#1
E93Dude Lieutenant 419 Rep 471 Posts Drives: 2007 E93 MT6 Join Date: Sep 2018 Location: The Old Dominion iTrader: (0) Garage List 2007 BMW E93 [0.00]	Fluid Leak During Brake Pad/Rotor Refresh Replaced front rotors/pads over the weekend. I was almost done when I noticed a fluid spot under driver side door/front corner panel joint. Am baffled. Any thoughts on the source? Am including photo of where I believe the leak came through the underhood shield. I believe it was oil, but not sure. Brake fluid replaced 30K ago, so it shoudn't be that color anyway. I checked the brake fluid reservoir, and no fluid appears to have leaked out when I compressed the calipers to get the new pads in. I wonder if I have some other mystery leak that had been pooling for some time on the underhood shield. I did the OFHG and VCG a few months ago, and do not believe either are leaking. Yes, I know my jack pads are mangled and my inspection is expired. I have replacements, and a new jackpad adapter.... Attached Images __________________ BMW: Doing Amazing(ly cheap) Things With Plastic (crap) Since the E90... Last edited by E93Dude; 04-05-2021 at 10:18 PM..
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04-05-2021, 11:11 PM	#2
bluewater328 Colonel 645 Rep 2,098 Posts Drives: 2011 bluewater 328i LCI sedan Join Date: Aug 2010 Location: Hawaii iTrader: (0)	Looks like oil. Hard to say without some other clues. Pull the bottom tray and take a look around. Check your pan (and drain plug). Then re-inspect VCG, OFHG. Also check Vanos. But basically, look for oil traces and follow the trail.
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