Master Cylinder - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 10-28-2006, 02:10 PM   #1
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Default Master Cylinder

Ok so ive searched around here and got results on how to successfully change the master cylinder but on other places i have looked it says when im done i need a tech 1 scan tool to auto bleed the abs. Do i need this to do it or can i change the master cylinder without the tech 1 scan tool. i need to change the master cylinder because it is going bad and when i stand on the brakes long enough it sinks to the floor, i plan on doing this tomorrow if i dont need the scan tool (im no longer driving it until then, im not messing around with brakes).
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Old 10-28-2006, 02:12 PM   #2
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Forget the auto-bleed and just bench-bleed it before install.
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Old 10-28-2006, 02:20 PM   #3
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alrighty then it looks like i got a green light to go
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Old 10-28-2006, 02:23 PM   #4
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yeah its not to hard to do, i did it a month or so ago.

Took two people if you dont have somthing to hold it with.

I held it while my Brother pushed the plunger in and let it come back out.

took a while to get all the air out but it worked

Car stops much better not, and the peddle feels firmer
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Old 10-28-2006, 04:06 PM   #5
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Make sure you bleed all 4 corners after the install.
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Old 10-29-2006, 01:05 AM   #6
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can you do that with the wheels on? i have to do the front brakes anyway just because i got new pads but i already did the rear brakes and dont want to have to take the wheels off again, i will if i have to, its probably easier too but if its just as easy to leave them on i would rather do that
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Old 10-29-2006, 01:35 AM   #7
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Quote:
Originally Posted by wintboy
can you do that with the wheels on? i have to do the front brakes anyway just because i got new pads but i already did the rear brakes and dont want to have to take the wheels off again, i will if i have to, its probably easier too but if its just as easy to leave them on i would rather do that
hah, IMO you CAN do it wit them on, but you had better be made of clay its doable with a flashlight but make sure the back is raised...otherwise faggetaboutit. So. Back on ramps, front on jackstands. it seems doable to me, but taking off the wheels seems alot less of a hassle :P
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Old 10-29-2006, 01:40 AM   #8
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it does doesnt it, ok ill do that, i just figured if it was doable without being a pain i would do it without taking the wheels off but ill just take the wheels off
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Old 10-30-2006, 01:32 PM   #9
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Technically.. I'm sure someone could say it'* possible to do with the wheels on..

You'll spend more time and effort than starting by taking the wheels off
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Old 10-30-2006, 02:09 PM   #10
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Yeah, take the wheels off and, I know that its gonna sound like a no brainer but, I recommend you start bleeding from the wheel furthest from the MC. Meaning the right rear.
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