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Old 07-20-2014, 06:24 PM   #1
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Default Rear brake bleeding problem

Good day

I changed out the rear right side calliper on my 03 Lesabre. The master cylinder didn't go low but now I am having a hard time bleeding the line.

I am using a Mytivac on the bleeder screw and have gone though filing the little bottle 4 times now. Bubbles, bubbles and more bubbles. Don't understand. Each time I go and top up the master cylinder for the same outcome.

I have tried bleeding it with the engine running, not running, doesn't make a difference.

I haven't disconnected the battery yet or disconnected the ABS. Is this where I need to start?

Suggestions would be great. Getting difficult doing grocery shopping for 3 on a Triumph Bonneville.

Many thanks
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Old 07-20-2014, 07:20 PM   #2
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With out a scanner that can make the ABS pump do a internal bleed the only way your going to get the air out of the ABS unit is to go make a bunch of sliding stops in loose dirt or gravel and keep bleeding the brakes until the air is all out.
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Old 07-20-2014, 08:31 PM   #3
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Quote:
Originally Posted by 75 racer View Post
With out a scanner that can make the ABS pump do a internal bleed the only way your going to get the air out of the ABS unit is to go make a bunch of sliding stops in loose dirt or gravel and keep bleeding the brakes until the air is all out.
Thanks for that 75 racer. Don't think the wife will be to keen about that though.
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Old 07-20-2014, 10:13 PM   #4
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If your getting bubbles it sounds like you are getting are in the system possible a leak somewhere.
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Old 07-20-2014, 10:31 PM   #5
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Whenever you open up a brake system, YOU DO NOT LET AIR ENTER IT! It'* obvious, the line was filled with air....

For future jobs, you disconnect that steel line from the caliper, then you plug it...with a tight fitting cap or slide a tight fitting vac hose over the end and then clamp it close to the metal line.....

If you are pulling a vac on the system, and you are getting bubbles continuously, you have a lot more air in the system then you should have.....fill that reservoir, and let that line gravity bleed, making sure the reservoir level does not get low...when you have good flow, attach the line to the caliper, and slowly have someone pump the brakes for a hard pedal, and then hold pressure on the pedal....then open the bleeder slowly, when the pedal reaches the floor, close the bleeder, pump the brake pedal slowly until you have a hard pedal, and hold down on the pedal.....slowly open the bleeder, and when the pedal reaches the floor, close the bleeder....repeat until no air comes out of the bleeder.....
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