Break fluid change question
Hotshot
Joined: Mar 2007
Posts: 10,101
Likes: 40
From: Pa
I use the Motive Power Bleeder. I drained as much of the old fluid out of the master cylinder reservoir before I hooked up the power bleeder so I didn't have to push all that old fluid through the system.
You just pressurize the system with the power bleeder as per the directions. Then open the bleed screw with a catch bottle attached starting at the caliper the farthest from the master cylinder. So you start with the passenger side rear, then the drivers side rear, then passenger side front and etc. You let the fluid drain out of each until the fluid runs clear with no air bubbles, then close the bleeder and go to the next caliper. Its pretty easy.
I used clear brake fluid. If you tilt the catch bottle and hold it towards the light you can see the dirt in the fluid as it runs into the catch bottle. You will see when the clean fluid comes through. You don't have to buy a special color fluid if you don't want. I made my own large catch bottle using a 32oz screw top bottle which I screwed brass fittings into the lid to attach the hose. The larger bottle is nice when draining a lot of fluid out like you do during a system flush.
You just pressurize the system with the power bleeder as per the directions. Then open the bleed screw with a catch bottle attached starting at the caliper the farthest from the master cylinder. So you start with the passenger side rear, then the drivers side rear, then passenger side front and etc. You let the fluid drain out of each until the fluid runs clear with no air bubbles, then close the bleeder and go to the next caliper. Its pretty easy.
I used clear brake fluid. If you tilt the catch bottle and hold it towards the light you can see the dirt in the fluid as it runs into the catch bottle. You will see when the clean fluid comes through. You don't have to buy a special color fluid if you don't want. I made my own large catch bottle using a 32oz screw top bottle which I screwed brass fittings into the lid to attach the hose. The larger bottle is nice when draining a lot of fluid out like you do during a system flush.
Postmaster
Joined: Jun 2008
Posts: 2,564
Likes: 11
From: Wayyy NoCal, USA
I made a Motive style pressure bleeder out of a garden sprayer for bleeding our BMW. Works great, but it seems like every vehicle needs a different cap.
Since I am working on about 20 different vehicles (cars, trucks, M/C's, quads), my usual weapon of choice is the Mityvac 7430. Hooked up to compressed air, it provides constant suction. Suck the reservoir dry, then refill go wheel to wheel and suck through.
Also handy for evacuating P/S reservoirs and the like.
Since I am working on about 20 different vehicles (cars, trucks, M/C's, quads), my usual weapon of choice is the Mityvac 7430. Hooked up to compressed air, it provides constant suction. Suck the reservoir dry, then refill go wheel to wheel and suck through.
Also handy for evacuating P/S reservoirs and the like.
Fleet Mechanic
Joined: Sep 2007
Posts: 1,256
Likes: 6
From: Garden Valley, Idaho
I went with 5 dot Blue Racing when I did my brake fluid change. Easy to know when it was bled with the fresh fluid as the new is all blue in color. Also ranked the best brake fluid you can buy. I think it took almost 3 cans.
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