Thread: Brake Pad Replacement - DIY?
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Old Jul 9, 2010 | 10:38 PM
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onehundred80
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Default Re: Brake Pad Replacement - DIY?
Originally Posted by JimmyJames
Hey pizzaguy
When I had my repair shop, some thought I was full of it, but this is true. Also water can compress more than brake fluid, especially degraded brake fluid, so your stopping distance is increased. Not by much, but I would tell my customers that I was doing a brake job for THREE FEET. That is the distance from not hitting the bumper and not hitting the BACK SEAT of the car in front of you!!! In a panic stop, THREE FEET is a HUGE difference.
At the pressures we are talking about water or oil does not compress. The amount of water that is absorbed by the brake fluid is quite minimal, 5 to 6% and is handled by the corrosion inhibitors in the oil. This water content would not be visible, visible water is a serious contamination and will be the result of water entering the reservoir, not good.
Brake oil with a high water content seemingly does compress a little but I doubt anyone would notice except in a laboratory.
However the oil should be changed, depending on driving style, time etc. When rotors are changed would be a good time to change the oil.
After all an ounce of protection is worth a pound of cure.
 
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