All Things Mk5 > How to Guides / Troubleshooting
What does this code stand for.
Jons1001:
--- Quote from: andyiseddy02 on February 28, 2021, 01:55:01 pm ---Brake fluid service.
--- End quote ---
Brake fluid did cross my mind but why the 4% next to it?
rich83:
--- Quote from: Jons1001 on February 28, 2021, 02:21:16 pm ---
--- Quote from: andyiseddy02 on February 28, 2021, 01:55:01 pm ---Brake fluid service.
--- End quote ---
Brake fluid did cross my mind but why the 4% next to it?
--- End quote ---
Probably 4% water in the tested brake fluid
LC5F:
Brake fluid is hygroscopic, suspect the 4% is how much water it has absorbed.
Ideally brake rake fluid should be replaced every 2 years - from the americanese definition below it sounds like yours is saturated:
"When the brake fluid becomes saturated with water (3.7 percent by volume), that water can boil in the lines and produce steam (the gaseous form of water). Unlike a liquid, a gas is highly compressible. To some this up, when a compressible substance (steam) is introduced into a hydraulic system (the brakes), that system can no longer function and the pedal will likely go to the floor –not good! Replacing the fluid before it becomes saturated with water (which we will touch on later) is the key to maintaining the dry boiling point."
https://www.turnology.com/tech-stories/brake-fluid-need-know/
Navigation
[0] Message Index
[*] Previous page
Go to full version