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VW MKIII-A3/B4 TDIs This is a discussion about MKIII-A3/MkIII Jetta/Golf (<99.5) and B4 Passats (96,97) TDI's. Non TDI related postings will be moved or removed.

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Old January 6th, 2008, 06:31   #1
dweisel
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Default Brake master cylinder/clutch master cylinder?

Now I am confussed...............everyones thoughts were that the master cylinder was bad on my 96 B4 Passat Wagon. I looked up the parts and the different auto parts stores show a brake master cylinder and a clutch master cylinder. I was under the impression that they were combined as one unit. If they are seperate, where is the clutch master cylinder located? If they are the same which part do I order??? Also if they are one unit wouldn't it not only affect my brakes,but the clutch function also.

Thanks, Dweisel

Last edited by dweisel; January 6th, 2008 at 06:37.
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Old January 6th, 2008, 06:38   #2
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If it like my 03 Jetta, they share the same fluid from the brake master cylinder. The clutch master cylinder is mounted on the transmission.
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Old January 6th, 2008, 06:43   #3
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At the brake master cylinder reservoir, follow the tube to the clutch master cylinder.
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Old January 6th, 2008, 08:43   #4
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Quote:
Originally Posted by lost1wing
If it like my 03 Jetta, they share the same fluid from the brake master cylinder.
Yes!

Quote:
Originally Posted by lost1wing
The clutch master cylinder is mounted on the transmission.
Actually the clutch master is on the firewall, next to the brake master, ~4-6" to the right, when facing the brake/clutch master cyl. What you refer to is the clutch slave cylinder.

HTH

Tony
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Old January 7th, 2008, 06:18   #5
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Quote:
Originally Posted by TonyJetta
Yes!



Actually the clutch master is on the firewall, next to the brake master, ~4-6&quot; to the right, when facing the brake/clutch master cyl. What you refer to is the clutch slave cylinder.

HTH

Tony
After I put down the crack pipe, I realized what I wrote. TonyJetta, thanks for the correction.
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Old January 7th, 2008, 07:16   #6
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lost1wing, no worries....You should see some of my posts late at night!

Tony
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Old January 11th, 2008, 11:45   #7
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Hey guys, question.....

how often do these things need to be replaced? I am still currently on the originals and am planning a brake fluid change this summer and wondering if they should be replaced.

I know the seal around my clutch slave cylinder is toast so I will be replacing that, but I know nothing about how the master cylinder works.
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Old January 11th, 2008, 11:51   #8
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It depends on if you change the brake fluid as required (every two years). Moisture will lead to corrosion, which leads to failures. Also note that if you top off you brake fluid, you do it with the proper type (never mix fluids).
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Old January 11th, 2008, 13:11   #9
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[quote=codeblue]Hey guys, question.....

how often do these things need to be replaced? I am still currently on the originals and am planning a brake fluid change this summer and wondering if they should be replaced.

I know the seal around my clutch slave cylinder is toast so I will be replacing that, but I know nothing about how the master cylinder works.

How do you no if the clutch slave cylinder is toast, is it leaking?

The Brake and Clutch fluid need to be replaced every two years and use Dot 4 type only.
The clutch and brake master cylinders work the same. You push on a piston and it moves fluid and a piston (clutch) pistons (brakes) on other end.

Walt
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Old January 12th, 2008, 12:01   #10
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Exclamation Having clutch problems as well

As of this last Monday, I was unable to down shift and then, when stopped at a light, it would not shift into (any) gear. I shut it off, put it into first, and started the car when the light turned green. I was able to up shift with relativly no problems. Then on Tuesday, I started the Passat, and tried to shift into reverse. Again, it didn't want to shift into any gear. However, this time when I tried to shift it into reverse (with the car still running and clutch depressed) it started to move backwards without fully going into gear.

I can only visibly see the brake master with reservoir. I checked it and it's at or just below the MIN mark. Is there a clutch reservoir, and if so, where do I find it? I looked just to the right of the brake setup on the firewall, but don't really see anything.

Does this sound like a master/slave problem, or more like a full on clutch replacement?

Any help would be greatly appreciated. I can probably post pics if needed/wanted.


Thanks.
- Norm
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Old January 12th, 2008, 12:26   #11
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Did you find an answer, I have the same problem
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Old January 12th, 2008, 15:09   #12
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Have you checked the adjustment at the linkage? 13mm nut is often loose. Also not uncommon to find the plastic mounting piece broken.

Adjustment procedures/pictures in the link below.
http://www.dieselgeek.com/A3B4Corrvr6sidetoside.htm
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Old January 13th, 2008, 08:17   #13
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ah I never got that peice from Dieselgeek when I bought my short shift kit from him.

But check this out, the ultimate fix for the plastic mounting peice breaking. (even though mine never has, it's only a matter of time)

http://www.gruvenparts.com/website/c...category_id=60

I bought one of these and fits perfectly in a TDI 02A.
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Old January 13th, 2008, 12:03   #14
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Might that be the same trans that's in a B4?

Hmmmm?????

Tony
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Old June 26th, 2009, 20:29   #15
Diesel_Aggie
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Quote:
Originally Posted by TonyJetta
Might that be the same trans that's in a B4?

Hmmmm?????

Tony
Not sure if the transmission is the same but the 1JO-711-256 part number this upgrades is used on the B4 Passat.
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