[mgarblik]

Brake bleeding is always a fun topic. Like Sirrotica, I work alone 95% of the time. Gravity bleeding works great nearly all the time. I have a venturi style vacuum bleeder as well. To save time I often use it to start the bleeding procedure faster, especially in cars with ABS where fluid to the calipers passes through the ABS modulator first before getting to them. Vacuum speeds the process. Once flowing fluid, I remove and let it gravity bleed. I have XM radio in my shop and listen to the 60's mostly. Once the fluid is flowing, I let each wheel gravity bleed 2 songs, about 6 minutes each. That gives me a great pedal almost every time. Some vehicles with ABS can be a bear to get the air out of if the system has gone dry. (ABS modulator). Some have bleeder screws on the unit, which helps. They can be gravity bled. Some don't. The scan tool in bleed mode really just energizes all the valves and solenoids in the ABS unit and helps vent any tiny air bubbles to the MC. I have had some GM trucks I had to scan tool bleed 6 cycles to get a nice pedal. Changing brake fluid is a good idea as it absorbs water. I change fluid for customers all the time. ATE now sells brake fluid in 3 colors, Amber, green and red I think. You suck out the MC and put a different color fluid in the MC. Then when you bleed the brakes at the wheels, you look for the color change to know you have the old stuff out. Kind of a neat idea.

[Sirrotica]

Mike, it would be better yet if you had a product that changed color to let you know when it should be changed. Identify when the water content was above a certain point.

If I remember correctly there are some test strips to identify when it should be changed, but I'm not certain that's correct. I could be thinking of coolant PH straps.

I do know there are millions of vehicles that are on the road that have their born with fluid still in the system years past thev3 year suggested time frame.

[tallrandyb]

Originally Posted by Sirrotica

Mike, it would be better yet if you had a product that changed color to let you know when it should be changed. Identify when the water content was above a certain point.

If I remember correctly there are some test strips to identify when it should be changed, but I'm not certain that's correct. I could be thinking of coolant PH straps.

I do know there are millions of vehicles that are on the road that have their born with fluid still in the system years past thev3 year suggested time frame.

Used to be a German brake fluid in blue and tan; bleed until new color shows up, done! I loved it when on road courses with my 94 Pontiac.

I believe they stopped making it based on something about being able to identify what fluid was leaking from a car/part? Different color coolants but I guess that’s not so hard to identify.


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[tallrandyb]

Originally Posted by mgarblik

Brake bleeding is always a fun topic. Like Sirrotica, I work alone 95% of the time. Gravity bleeding works great nearly all the time. I have a venturi style vacuum bleeder as well. To save time I often use it to start the bleeding procedure faster, especially in cars with ABS where fluid to the calipers passes through the ABS modulator first before getting to them. Vacuum speeds the process. Once flowing fluid, I remove and let it gravity bleed. I have XM radio in my shop and listen to the 60's mostly. Once the fluid is flowing, I let each wheel gravity bleed 2 songs, about 6 minutes each. That gives me a great pedal almost every time. Some vehicles with ABS can be a bear to get the air out of if the system has gone dry. (ABS modulator). Some have bleeder screws on the unit, which helps. They can be gravity bled. Some don't. The scan tool in bleed mode really just energizes all the valves and solenoids in the ABS unit and helps vent any tiny air bubbles to the MC. I have had some GM trucks I had to scan tool bleed 6 cycles to get a nice pedal. Changing brake fluid is a good idea as it absorbs water. I change fluid for customers all the time. ATE now sells brake fluid in 3 colors, Amber, green and red I think. You suck out the MC and put a different color fluid in the MC. Then when you bleed the brakes at the wheels, you look for the color change to know you have the old stuff out. Kind of a neat idea.

I didn’t know ATE had 3 colors, I’ll need to check that out thanks!


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