I just repaired my rear cross member due to rust and brake fluid. the question is my master cylinder I think is leaking. It is wet where the brake booster and the master cylinder meet.
Another question how can you tell if a brake booster is bad? I might just have to replace the master cylinder but also would like to know how you can see if a brake booster is bad?

 

When you turn on the car while pressing the brake, the brake pedal should move closer to the floor (lose some of its tension) when the engine starts. This is from the brake booster receiving intake vacuum and shows that it is working. When the booster doesn't work, the brake pedal will stay too firm after starting the car. A leak where the MC meets the booster is usually the MC gasket.

 

9 times out of 10 its ur master cylinder, easy fix and pretty inexpensive.

 

I'd bank on the MC as well. If you're interested, I have a brand new EX one laying around I'm trying to part with

 

ok well thats what i was going to replace first but I need one off of a integra then non abs though. since I have integra brakes all around with the 40/40 proportion valve. does anyone of you guys have one for sale? If so pm me so I can get this fixed.

 

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I need this question answered. Is there any difference in a 15/16 integra master cylinder and brake booster than a 99 si master cylinder and brake booster that is stamped 7/8 on it. both are non abs btw.

Acura integra BB and MC 15/16
99 si BB and MC 7/8
any difference?

 

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bump somebody please just tell me if there the same or if there different with integra brakes.

 

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nobody knows?

 

I don't know the answer, but it seems like you needed to know someone was looking or trying to figure it out.
Sorry!

 

thanks I wish someone knew the answer to my question. I mean a si has all wheel disc brakes and so does a acura integra. I guess I just will have to find out for myself and if it dosen't work then I will have to try the integra one.



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I don't believe so, but I'm not 100%.

 

thats the size of the piston. higher it is the larger.
ITR is 1"
GSR 15/16
Civic EX is 7/8
Civic DX is 13/16

http://www.knology.net/~jediklc/brakeinfo.htm

http://www.ht-archive.com/showthread.php?t=2730080

https://honda-tech.com/forums/honda-crx-ef-civic-1988-1991-3/master-cylinder-differences-2668532/