Master Cylinder Replacement - Mistakes

gritbox · 22nd March 2016, 16:34

hi all, several people helped me on my original post and I apologise, you didn't waste your time, im just a total dunce with this and need it layed out in laymans terms for me re the issue below:

my master cylinder was replaced as I had no resistance till the very bottom in my pedal

it was changed and was great for 2 days...

now, when cold, there is no resistance till halfway down but when car heats up, it is a little better (not sure if theres a reason for that)

anyway, im taking it back down to garage who is going to bleed it and fill again but my question is, again in laymans terms if possible...what should I be telling him he may have done wrong?

I have seen reference to a "condom" thing, or a valve that may get clogged?

if someone can tell me, ill just show him literally the response

thank you

mh007 · 22nd March 2016, 17:21

First of all, the garage may not have done anything wrong.

Did you have an original plastic master cylinder fitted or a TAZU metal master with copper pipe (supplied in the kit) ?

The 'condom' is simply the seal that sits under the master cylinder reservoir cap.

There is a possibility that you may have a weeping/leaking slave cylinder (this also incorporates the clutch release bearing & is called a concentric slave clylinder).

If a TAZU with copper pipe was fitted, the pipe union should be checked for leaks at the master cylinder & the pipe should be checked in case it has rubbed through somewhere in the engine bay.

Of course, it could be that some air was trapped in the system:

A fluid top up & bleed, then check for leaks would be the first thing to do.

gritbox · 22nd March 2016, 17:25

hi matey thanks for reply

had original an they fitted the tazu with copper pipes

I may be worrying about nothing, but they said how easy it was to bend the copper piping into place...take it that's what they need to do?

if it is the slave...can I see this by looking into the engine bay?

or would there be leaks on my driveway?

if so...where abouts?

thing is...when I first took it in complaining of clutch issues...before just telling me it was my master cylinder, would they not have checked the slave too?

vincentfishing · 22nd March 2016, 18:08

I had almost the same thing after I changed mine, lot of free travel bit clunky when cold better when warmed up but low bite,, re bled it with eazybleed
all play gone ,bite lot higher and lighter gearchange.
and to add ,when I rebled with eazybleed off space saver ,some thing wasn't right,,,,,turned out spare was almost flat ,redid it off car wheel and bled fine

FrenchMike · 22nd March 2016, 18:09

Hi Frankie, i have already answered via PM forgetting to ask
Why the master and only it has been replaced ?
How many miles ?

Mike

gritbox · 22nd March 2016, 18:16

Quote:

Originally Posted by vincentfishing

I had almost the same thing after I changed mine, lot of free travel bit clunky when cold better when warmed up but low bite,, re bled it with eazybleed
all play gone ,bite lot higher and lighter gearchange.
and to add ,when I rebled with eazybleed off space saver ,some thing wasn't right,,,,,turned out spare was almost flat ,redid it off car wheel and bled fine

see that's what im hoping, a re-bleed will sort it

only thing is, the guy says the easibleed wont fit for me, as its not meant for master cylinders above the clutch where it is on the zt

does this make you think the guys just clueluess or is he right?

I hate doubting professional workmen, especially when I know NOTHING myself, but always worth checking...

Quote:

Originally Posted by FrenchMike

Hi Frankie, i have already answered via PM forgetting to ask
Why the master and only it has been replaced ?
How many miles ?

Mike

merci beaucoup

only the master because when I took it in, he told me it WAS the master

also, because that's less costly than the slave

surely hye would have checked both when I first took it in?

the slave has only done 50k miles, so im hoping its not that...

vincentfishing · 22nd March 2016, 19:38

the eazybleed fits on the master above the clutch on our cars fine, bit fiddly getting it on and off but there are loads of posts on here of members who use them,,, think your man is a bit of a chancer !!!

Dorset Bob · 22nd March 2016, 19:53

When Andy Willi did my clutch he used one and plugged it into the offside front tyre.
With him it was on and off in a few seconds.

Atcchus · 23rd March 2016, 07:12

Easybleed works just fine mate . Or you can try the reverse bleed , it's much easier I think. I have easybleed if you want to borrow for couple of days you can .

marinabrian · 23rd March 2016, 07:36

The sound deadening makes it a bit fiddly to fit the eezibleed cap onto the master cylinder reservoir.

If you are doing this job yourself, you can of course either cut away the sound deadening and vacuum the debris up before removing the cap, or do as I did simply remove the rear securing bolt and slacken the front, and disconnect the pushrod clevis to allow the master to pivot around the front bolt.

Removing the clutch pedal makes access shed loads easier, and is a ten minute job to remove and refit

This applies to the original master cylinder, as I've never had cause to fit a Tazu type, however I suspect it would be similar.

Hope this helps

Brian

22nd March 2016, 16:34	#1
gritbox Loves to post MG ZT 190 Join Date: Aug 2014 Location: Glasgow Posts: 497 Thanks: 25 Thanked 36 Times in 24 Posts	Master Cylinder Replacement - Mistakes hi all, several people helped me on my original post and I apologise, you didn't waste your time, im just a total dunce with this and need it layed out in laymans terms for me re the issue below: my master cylinder was replaced as I had no resistance till the very bottom in my pedal it was changed and was great for 2 days... now, when cold, there is no resistance till halfway down but when car heats up, it is a little better (not sure if theres a reason for that) anyway, im taking it back down to garage who is going to bleed it and fill again but my question is, again in laymans terms if possible...what should I be telling him he may have done wrong? I have seen reference to a "condom" thing, or a valve that may get clogged? if someone can tell me, ill just show him literally the response thank you

22nd March 2016, 17:21	#2
mh007 This is my second home MG ZT260 SE, MG ZT190+, MG ZTT 160, R75 Conn SE 2.0, R75 Conn SE 2.5 X 3, R75 Club SE 1.8, P5B Coupe Join Date: Jul 2009 Location: Keynsham, Bristol Posts: 4,211 Thanks: 65 Thanked 635 Times in 499 Posts	First of all, the garage may not have done anything wrong. Did you have an original plastic master cylinder fitted or a TAZU metal master with copper pipe (supplied in the kit) ? The 'condom' is simply the seal that sits under the master cylinder reservoir cap. There is a possibility that you may have a weeping/leaking slave cylinder (this also incorporates the clutch release bearing & is called a concentric slave clylinder). If a TAZU with copper pipe was fitted, the pipe union should be checked for leaks at the master cylinder & the pipe should be checked in case it has rubbed through somewhere in the engine bay. Of course, it could be that some air was trapped in the system: A fluid top up & bleed, then check for leaks would be the first thing to do. Last edited by mh007; 22nd March 2016 at 17:25..

22nd March 2016, 19:53	#8
Dorset Bob Senior Citizen Rover 75 2.5 Connoisseur SE,Chrysler 300C,124 Spider, Daytona 955i,Honda XL250 & Royal Enfield 650GT Join Date: Feb 2008 Location: The Kingdom of Wessex Posts: 6,976 Thanks: 2,391 Thanked 2,685 Times in 1,686 Posts	When Andy Willi did my clutch he used one and plugged it into the offside front tyre. With him it was on and off in a few seconds. __________________ Let the good times roll............

22nd March 2016, 17:25	#3
gritbox Loves to post MG ZT 190 Join Date: Aug 2014 Location: Glasgow Posts: 497 Thanks: 25 Thanked 36 Times in 24 Posts	hi matey thanks for reply had original an they fitted the tazu with copper pipes I may be worrying about nothing, but they said how easy it was to bend the copper piping into place...take it that's what they need to do? if it is the slave...can I see this by looking into the engine bay? or would there be leaks on my driveway? if so...where abouts? thing is...when I first took it in complaining of clutch issues...before just telling me it was my master cylinder, would they not have checked the slave too?

22nd March 2016, 18:08	#4
vincentfishing Loves to post rover 75cdt diesel saloon Join Date: Mar 2013 Location: Westgate on sea Posts: 441 Thanks: 21 Thanked 83 Times in 64 Posts	I had almost the same thing after I changed mine, lot of free travel bit clunky when cold better when warmed up but low bite,, re bled it with eazybleed all play gone ,bite lot higher and lighter gearchange. and to add ,when I rebled with eazybleed off space saver ,some thing wasn't right,,,,,turned out spare was almost flat ,redid it off car wheel and bled fine

22nd March 2016, 18:09	#5
FrenchMike This is my second home Rover 75 Saloon Join Date: Aug 2007 Location: Avignon Posts: 4,466 Thanks: 94 Thanked 661 Times in 554 Posts	Hi Frankie, i have already answered via PM forgetting to ask Why the master and only it has been replaced ? How many miles ? Mike

22nd March 2016, 19:38	#7
vincentfishing Loves to post rover 75cdt diesel saloon Join Date: Mar 2013 Location: Westgate on sea Posts: 441 Thanks: 21 Thanked 83 Times in 64 Posts	the eazybleed fits on the master above the clutch on our cars fine, bit fiddly getting it on and off but there are loads of posts on here of members who use them,,, think your man is a bit of a chancer !!!

23rd March 2016, 07:12	#9
Atcchus Posted a thing or two Rover 75 CDT Auto Tourer Join Date: Mar 2014 Location: Glasgow Posts: 1,056 Thanks: 274 Thanked 165 Times in 129 Posts	Easybleed works just fine mate . Or you can try the reverse bleed , it's much easier I think. I have easybleed if you want to borrow for couple of days you can .

23rd March 2016, 07:36	#10
marinabrian MG ZT Join Date: Jan 2011 Location: Newcastle Upon Tyne Posts: 20,151 Thanks: 3,565 Thanked 10,837 Times in 5,718 Posts	The sound deadening makes it a bit fiddly to fit the eezibleed cap onto the master cylinder reservoir. If you are doing this job yourself, you can of course either cut away the sound deadening and vacuum the debris up before removing the cap, or do as I did simply remove the rear securing bolt and slacken the front, and disconnect the pushrod clevis to allow the master to pivot around the front bolt. Removing the clutch pedal makes access shed loads easier, and is a ten minute job to remove and refit This applies to the original master cylinder, as I've never had cause to fit a Tazu type, however I suspect it would be similar. Hope this helps Brian