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D2 - Axles, Brakes, Suspension and Steering Brakes, Springs, shocks, steering racks, steering columns, suspension arms, wheel hubs etc.

 
 
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Old 27th January 2016, 10:52 AM
MikkiJayne MikkiJayne is offline
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Join Date: Jan 2012
Posts: 5,017
Default Sweating brake fluid!

Hi all,

Has anyone seen rubber hoses 'sweating' brake fluid before? The hose running across the firewall from the ESP pump and the fluid reservoir constantly appear to be covered in condensation, but while poking about I've discovered that this 'condensation' has actually dissolved the paint where the hose is in contacts with the body! Its not just abrasion, as the paint has gone soft and bubbled up.

The fluid hasn't been changed for a very long time so I'm wondering if the water content in the fluid could be assisting the fluid in getting through the hose? Osmosis perhaps? I'm inclined to change the hose to be safe, and the reservoir since it's filthy inside, but that then leads to the question of bleeding the system which seems to be a bit of a problem area from other threads on the subject.

Elsawin covers the procedure to activate the pump using basic settings, as described elsewhere. This can be replicated in VCDS, so it sounds entirely safe to me, but others have mentioned it can cause damage. Does anyone have 1st hand experience of this?

Thanks
Attached Files
File Type: pdf bleeding_esp.pdf (158.3 KB, 420 views)

Last edited by MikkiJayne; 27th January 2016 at 11:08 AM.
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