Leaking brake fliud - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 08-21-2006, 10:21 AM   #1
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Default Leaking brake fliud

This car is killing me. The pedal goes all the way to the floor when you press it and there is allot of brake fluid under the car. How much and how hard is it to change a master cylinder? Does the system need to be purged after installing a new cylinder?
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Old 08-21-2006, 10:24 AM   #2
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the MC is easy....you do need to bench bleed the MC before you install it and then bleed the brakes once its installed.....less than 30 min to complete the job

I do have to tell you that i completed my MC change in a parking lot...so its not that bad...

CAUTION....BE SURE to measure your MC before you go and pruchase a new one...you need the correct one, and there are 2 listed for every year Bonnne.....you will either have a 6" or an 8"
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Old 08-21-2006, 10:30 AM   #3
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Quote:
Originally Posted by 1993 SLE
the MC is easy....you do need to bench bleed the MC before you install it and then bleed the brakes once its installed.....less than 30 min to complete the job

I do have to tell you that i completed my MC change in a parking lot...so its not that bad...

CAUTION....BE SURE to measure your MC before you go and pruchase a new one...you need the correct one, and there are 2 listed for every year Bonnne.....you will either have a 6" or an 8"
Measure, got it. Now what do you mean bench bleed? I have never had to do this before so its all new to me.

Also how do you bleed the brakes?
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Old 08-21-2006, 10:33 AM   #4
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If you are losing a ton of fluid.. are you sure it'* the master and not a brake line?
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Old 08-21-2006, 10:46 AM   #5
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Quote:
Originally Posted by BillBoost37
If you are losing a ton of fluid.. are you sure it'* the master and not a brake line?
Me thinks maybe it could be a line. It was dark by the time I was on that problem, it might be. It leaves a nice 2 foot diameter puddle under the car, it leaks allot....
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Old 08-21-2006, 10:51 AM   #6
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It'* not dark now.. I bet you are at work though.

If you lift the hood..you'd see fluid all over the vac booster if it'* leaking that much. This sounds a lot like a line.
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Old 08-21-2006, 11:19 AM   #7
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Quote:
Originally Posted by BillBoost37
It'* not dark now.. I bet you are at work though.

If you lift the hood..you'd see fluid all over the vac booster if it'* leaking that much. This sounds a lot like a line.
It probably is becasue when i was under the hood changing plugs wires ect..... I didn't see brake fluid on the physical cylinder on the fire wall, I just assumed. I hope its a line, they are cheaper!!!
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Old 08-21-2006, 11:21 AM   #8
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Not after you buy a double flaring tool
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Old 08-21-2006, 11:28 AM   #9
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Quote:
Originally Posted by BillBoost37
Not after you buy a double flaring tool
So are you saying if it is brake lines it might be chaper to take it somewhere?
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Old 08-21-2006, 11:38 AM   #10
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Probably cheaper and easier...

Ask 94bonnessei and 1993 sle
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