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Changing the Master Cylinder, any tips?

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Old Mar 27, 2001 | 07:19 AM
  #1  
kiztope's Avatar
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From: Austin, Tx
Car: 92 Formula
Engine: L98
Transmission: A4
Changing the Master Cylinder, any tips?

My car aint stoppin right. There are no leaks, (the MC resivior is full of brake fluid...) so I am gonna change the master cylinder.

Any body got any tips for me before I dig into this this afternoon? I have been told that it shouldnt take more than an hour to do.


Thanks!

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Old Mar 27, 2001 | 08:16 AM
  #2  
tregnab's Avatar
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From: Indianapolis, IN USA
Fairly easy job. Make sure to bench bleed the new Master Cylinder. Don't do the bench bleed on the car, do it in a vise like the instructions say. This step is critical

Use a brake line wrench on the fittings to make sure you don't round a nut.

When I changed the Master Cylinder on my car a while back, I also took the proportioning valve off, took the springs out, and blew compressed air through it. After that, my car now stops like never before. I think the previous owner must have poured dirty fluid in the reservoir or something, because there was a little gunk in there.

------------------
Michael Bangert
mbanger@iupui.edu
'88 5.7 IROC
'99 CBR1100XX
'00 Silverado LT
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Old Mar 27, 2001 | 10:00 AM
  #3  
kiztope's Avatar
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Senior Member
25 Year Member
 
Joined: Oct 1999
Posts: 786
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From: Austin, Tx
Car: 92 Formula
Engine: L98
Transmission: A4
Well,
I also have very few tools here with me, so I dont have a vise!
I wish that I could do the compressed air thing too.....

Any other advise?
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Old Mar 27, 2001 | 04:08 PM
  #4  
tregnab's Avatar
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From: Indianapolis, IN USA
hmm, well, the vise is used to hold the new master cylinder stationary so that you don't spill fluid while pumping the piston with a screwdriver. You could probably jimmy up some way to support the cylinder, maybe using a wall or something to push against if you don't have access to a vise.

compressed air is the only way I know of to clean out the proportioning valve though...

------------------
Michael Bangert
mbanger@iupui.edu
'88 5.7 IROC
'99 CBR1100XX
'00 Silverado LT
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