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Old 04-08-2006, 11:24 AM
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Bleeding power brakes

When bleeding power brakes, do you need the engine running for the boost, or can you do it without the engine running?

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Old 04-08-2006, 11:34 AM
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I´ve never done it with the motor running.
Two weeks ago I did mine with a vacuum pump,best brake job I even did.
I´ll never bleed brakes again without one.
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Old 04-08-2006, 11:57 AM
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bleeding brakes

I have never thought about running the engine either, but then I don't pump the pedal. I recently tried Griot's venturi vacuum bleeder- runs off your compressor, simple to use. About $60. Bill
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Old 04-08-2006, 01:37 PM
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Done it both ways. I prefer to leave it off, and then start it to check overall pedal pressure.


In a while, Chet.
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Old 04-08-2006, 02:56 PM
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Power brakes use the same bleeding methods as regular brakes do.
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Old 04-08-2006, 04:54 PM
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You get a better feel of the peddle firmness if the motor is off.
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Old 04-08-2006, 06:08 PM
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word of advice

if your gonna bleed your own brakes for the first time
make sure your master is full leave the cap off open the bleeders one at a time and wait till you see fluid drip out watch to make sure there are no air bubbles . repeat this four all 4 wheels . reinstall the cap on the master
then proceed to bleed the brakes , ive seen many new masters get destroyed becuase this step was elimanated good luck
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Old 04-10-2006, 07:35 PM
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Quote:
Originally Posted by hotroddr
I have never thought about running the engine either, but then I don't pump the pedal. I recently tried Griot's venturi vacuum bleeder- runs off your compressor, simple to use. About $60. Bill
Mine was under $20...but took some assembling.

I got the venturi vacuum pump from Harbor Freight (it will go on sale for about $12 sometimes). I then hooked it up to a spaghetti sauce jar with some clear tubing and fittings from Home Depot. I will never do brakes again without it
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Old 04-10-2006, 08:37 PM
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because of the amount of extra preassure that the booster puts out, you could get many tiny air bubbles instead of a few large 1's, making a less sucessfull bleed with the power booster functioning, actully pump brakes to kill residual vacume in booster b4 bleeding.
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