|
||
|
|
3rd August 2021, 09:56 | #1 |
Avid contributor
MG ZT 160 V6 Join Date: Jul 2012
Location: West Sussex
Posts: 132
Thanks: 1
Thanked 8 Times in 7 Posts
|
Has any one had issues with metal master cylinder?
Just wondered if anyone has had issues with the metal master cylinder?
I bought one off eBay and after having had loads of trouble bleeding it and unable to get a full pedal, I've noticed it seems to be weeping fluid slightly. Read a comment on one of the Facebook pages recently with someone having issues bleeding a metal master too. |
3rd August 2021, 15:52 | #2 |
This is my second home
R75 Saloon. Join Date: Feb 2009
Location: France/or Devon.
Posts: 14,003
Thanks: 3,851
Thanked 2,167 Times in 1,816 Posts
|
There are lots of posts about the metal master cylinders in the forum stats pages.
|
3rd August 2021, 16:02 | #3 |
Avid contributor
MG ZT 160 V6 Join Date: Jul 2012
Location: West Sussex
Posts: 132
Thanks: 1
Thanked 8 Times in 7 Posts
|
Sorry not sure where you mean. I have searched.
|
3rd August 2021, 16:22 | #4 |
This is my second home
75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007
Location: Johannesburg ZA
Posts: 6,200
Thanks: 1
Thanked 859 Times in 613 Posts
|
Not that I follow this, having automatics, but I seem to remember Tazu being mentioned often.
That might be what you are looking for. Why they should leak seams strange to me. Maybe get better rubber and hone the surface of the cylinder. It can't be rocket science, unless the material is inferior, I would guess?
__________________
Worth his V8 in gold |
3rd August 2021, 17:22 | #5 | |
Loves to post
Rover75 tourer Join Date: Jun 2018
Location: Ashton
Posts: 428
Thanks: 121
Thanked 206 Times in 145 Posts
|
Quote:
Weeping fluid exactly where from ?
__________________
Common sense isn't a gift, it's a punishment because you have to deal with everyone who doesn't have it. |
|
3rd August 2021, 17:41 | #6 |
This is my second home
Roverless + 1.7D Sportage Join Date: Aug 2014
Location: East Norfolk
Posts: 7,050
Thanks: 729
Thanked 2,021 Times in 1,449 Posts
|
Here's a pic of the brass sleeve within the metal cylinder. It was my opinion that the tiny seals between the alloy and the brass leaked when under clutch operating pressure and then dribbled out via the piston operating rod, where the pedal is joined. Just my opinion.
They do not appear to be pressure seals but are under operating pressure.
__________________
Oil in my veins! Last edited by roverbarmy; 3rd August 2021 at 17:44.. |
4th August 2021, 06:04 | #7 |
This is my second home
75 Tourer 2.5 Auto, 1.8T, 75V8ZT Join Date: Jun 2007
Location: Johannesburg ZA
Posts: 6,200
Thanks: 1
Thanked 859 Times in 613 Posts
|
If the picture is of a pressure piston, it looks completely wrongly designed.
Firstly an o-ring in that position is not the best choice, and secondly, if chosen, it is of far too small cord diameter. But it would be far better to machine the front of the piston to take a conventional brake cylinder seal, with a skirt that is pressed against the sidewall when applied. It would be a small thing to get this to work! It looks like decent material and the machining is also good, just wrong.
__________________
Worth his V8 in gold |
4th August 2021, 06:40 | #8 |
This is my second home
Roverless + 1.7D Sportage Join Date: Aug 2014
Location: East Norfolk
Posts: 7,050
Thanks: 729
Thanked 2,021 Times in 1,449 Posts
|
The pic is of the sleeve that the piston slides in. I don't know why a sleeve was needed in an alloy body anyway. Perhaps the castings or the ally weren't up to the job?
Sent from my SM-G903F using Tapatalk
__________________
Oil in my veins! |
4th August 2021, 18:31 | #9 |
This is my second home
Rover 75 tourer Club CD/Limo Tints Join Date: Nov 2008
Location: Meneac
Posts: 6,759
Thanks: 5,007
Thanked 1,609 Times in 869 Posts
|
I have had a Metal master for several years now, I have never had a problem with it . The only thing which is slightly annoying is the engine compartment "noise" that is transmitted along the copper pipe, other than that not been a problem.
__________________
] "I started out with nothing, and Ive still got most of it left!" |
18th August 2021, 12:01 | #10 |
Avid contributor
MG ZT 160 V6 Join Date: Jul 2012
Location: West Sussex
Posts: 132
Thanks: 1
Thanked 8 Times in 7 Posts
|
Just to update on this. It was the new metal master cylinder at fault.
Just could not get a full pedal. Fitted a new plastic master cylinder from dmgrs with original plastic pipe, and it bled up no problems and has been fine since. Interestingly if I disconnected the master and slave, the pedal was firm, but it must have been drawing in air from somewhere. The metal master seemed to be weeping fluid - hard to tell where from but I think it was between the cylinder and reservoir. |
|
|