Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

 
 Reply to this topicStart new topic
> ATE Master Cylinder Question
Ed_Turbo
post Sep 23 2017, 04:49 PM
Post #1


Member
**

Group: Members
Posts: 440
Joined: 5-June 17
From: Hacienda Heights, Ca.
Member No.: 21,151
Region Association: Southern California
Quick question, I noticed a hole on the rubber boot. Anyone with knowledge about these Master Cylinders know if this is normal? Looks like a hole to relieve air. Just want to double check before installing, thanks. (IMG:style_emoticons/default/beerchug.gif)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
DM_2000
post Sep 23 2017, 05:07 PM
Post #2


Member
**

Group: Members
Posts: 217
Joined: 16-August 17
From: PA
Member No.: 21,351
Region Association: None
I've seen this on other brands or they at least have a groove / hole at the end of the master cylinder. ( hole pointing down. )

If the last seal in the MC leaks brake fluid, these holes let it leak out signaling a problem.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Ed_Turbo
post Sep 23 2017, 05:52 PM
Post #3


Member
**

Group: Members
Posts: 440
Joined: 5-June 17
From: Hacienda Heights, Ca.
Member No.: 21,151
Region Association: Southern California
QUOTE(DM_2000 @ Sep 23 2017, 04:07 PM) *

I've seen this on other brands or they at least have a groove / hole at the end of the master cylinder. ( hole pointing down. )

If the last seal in the MC leaks brake fluid, these holes let it leak out signaling a problem.


That makes sense (IMG:style_emoticons/default/idea.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
914Sixer
post Sep 23 2017, 08:02 PM
Post #4


914 Guru
*****

Group: Members
Posts: 9,026
Joined: 17-January 05
From: San Angelo Texas
Member No.: 3,457
Region Association: Southwest Region
Hole goes down. Weep hole to let you know you have a problem.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Ed_Turbo
post Sep 23 2017, 09:18 PM
Post #5


Member
**

Group: Members
Posts: 440
Joined: 5-June 17
From: Hacienda Heights, Ca.
Member No.: 21,151
Region Association: Southern California
QUOTE(914Sixer @ Sep 23 2017, 07:02 PM) *

Hole goes down. Weep hole to let you know you have a problem.


Actually it points to the side not down.

I think I am just making too much of a big deal out of this (IMG:style_emoticons/default/laugh.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
porschetub
post Sep 23 2017, 10:12 PM
Post #6


Advanced Member
****

Group: Members
Posts: 4,745
Joined: 25-July 15
From: New Zealand
Member No.: 18,995
Region Association: None
QUOTE(Ed_Turbo @ Sep 24 2017, 03:18 PM) *

QUOTE(914Sixer @ Sep 23 2017, 07:02 PM) *

Hole goes down. Weep hole to let you know you have a problem.


Actually it points to the side not down.

I think I am just making too much of a big deal out of this (IMG:style_emoticons/default/laugh.gif)

Basically it is a breather for the bellows as they are tight fit on the rod and cylinder ...just not an issue go well you will be fine (IMG:style_emoticons/default/beer.gif) .
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
76-914
post Sep 24 2017, 11:36 AM
Post #7


Repeat Offender & Resident Subaru Antagonist
**********

Group: Members
Posts: 13,638
Joined: 23-January 09
From: Temecula, CA
Member No.: 9,964
Region Association: Southern California
QUOTE(porschetub @ Sep 23 2017, 09:12 PM) *

QUOTE(Ed_Turbo @ Sep 24 2017, 03:18 PM) *

QUOTE(914Sixer @ Sep 23 2017, 07:02 PM) *

Hole goes down. Weep hole to let you know you have a problem.


Actually it points to the side not down.

I think I am just making too much of a big deal out of this (IMG:style_emoticons/default/laugh.gif)

Basically it is a breather for the bellows as they are tight fit on the rod and cylinder ...just not an issue go well you will be fine (IMG:style_emoticons/default/beer.gif) .

That's what I was thinking, too. The fluid will find its way out one way or another. (IMG:style_emoticons/default/beerchug.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
porschetub
post Sep 24 2017, 02:20 PM
Post #8


Advanced Member
****

Group: Members
Posts: 4,745
Joined: 25-July 15
From: New Zealand
Member No.: 18,995
Region Association: None
QUOTE(76-914 @ Sep 25 2017, 06:36 AM) *

QUOTE(porschetub @ Sep 23 2017, 09:12 PM) *

QUOTE(Ed_Turbo @ Sep 24 2017, 03:18 PM) *

QUOTE(914Sixer @ Sep 23 2017, 07:02 PM) *

Hole goes down. Weep hole to let you know you have a problem.


Actually it points to the side not down.

I think I am just making too much of a big deal out of this (IMG:style_emoticons/default/laugh.gif)

Basically it is a breather for the bellows as they are tight fit on the rod and cylinder ...just not an issue go well you will be fine (IMG:style_emoticons/default/beer.gif) .

That's what I was thinking, too. The fluid will find its way out one way or another. (IMG:style_emoticons/default/beerchug.gif)


(IMG:style_emoticons/default/av-943.gif) (IMG:style_emoticons/default/av-943.gif) think the OP found that out already with his old one (IMG:style_emoticons/default/headbang.gif) .
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mikey914
post Sep 25 2017, 01:57 AM
Post #9


The rubber man
**********

Group: Members
Posts: 12,738
Joined: 27-December 04
From: Hillsboro, OR
Member No.: 3,348
Region Association: None
It's for air
The cylinder should not leak here ................... wait for it .................................
Unless it's a URO and it will pump all your fluid out this hole providing no braking whatsoever
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
GeorgeRud
post Sep 25 2017, 08:49 AM
Post #10


Advanced Member
****

Group: Members
Posts: 3,725
Joined: 27-July 05
From: Chicagoland
Member No.: 4,482
Region Association: Upper MidWest
I'd assume that it's there to just provide release for air, but having brake fluid coming out would definitely tell you it's time for a new one.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Ed_Turbo
post Sep 25 2017, 04:11 PM
Post #11


Member
**

Group: Members
Posts: 440
Joined: 5-June 17
From: Hacienda Heights, Ca.
Member No.: 21,151
Region Association: Southern California
Quick update:

E-Mailed ATE and a german guy told me the hole is normal (he said 1.5mm). The hole is for air to release during operation and should be pointed down.

For those who said it was for air good job (IMG:style_emoticons/default/first.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
IronHillRestorations
post Sep 25 2017, 06:08 PM
Post #12


I. I. R. C.
*****

Group: Members
Posts: 6,785
Joined: 18-March 03
From: West TN
Member No.: 439
Region Association: None
If it leaks you don't know it until your brakes go bad or you notice the MC level is low. You really can't see the fluid leaking on the floor until it get catastrophic, the pedal board is in the way.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 7th December 2024 - 03:40 PM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...