rover 75 master cylinder quick question

craig8661 · 28th April 2011, 10:56

just replacing the clutch in the cdt i thought the master cylinder was empty when i opend the lid there was like a rubber insert in it do i remove the rubber seal when fitted into the car its a luk part with a mg sticker on it.

chris75 · 28th April 2011, 16:25

If it's what I think it is , leave it in ; it's there for a reason , to act as a vapour barrier and prevent the fluid absorbing water . It is often referred to as the "condom" on here . It is a flexible diaphragm which will shrink and swell to allow movement of fluid . Many folk on here have cut the bottom off it to allow the reservoir to hold more fluid , but it was fitted to at least the 400 and the 45 ranges before the 75 , without ever causing any problem . My own thinking is that if you need more fluid , you are better off finding the leak !

T-Cut · 28th April 2011, 16:51

MGR in their infinite wisdom believed the clutch system would last without any servicing of the hydraulics. So they sealed it for life. Trouble is it's not known for its longevity.

TC

drewbie · 28th April 2011, 19:04

The brake master doesnt need a 'condom', i think its only there so the whole unit can be sold as a ready filled off the shelf item. I removed mine and replaced it with an o ring. Bleed thru about 200ml yearly and fill to about 10mm from top of master.

craig8661 · 28th April 2011, 19:39

hi there i was going to refer to it as a odd shape condom lol its the clutch master cylinder.

will i need to bleed this one or is it a case of clip the pipes together and go

T-Cut · 28th April 2011, 20:45

The condom can be removed provided you replace the hydraulic fluid on a (say) 2 yearly schedule. It does allow you to double the reservoir capacity. However, like brake fluid, it will slowly hydrate and become less efficient over time. The original idea was the prevent moisture absorption as a sealed for life system.

TC

drewbie · 28th April 2011, 21:13

Im confident that slave and master clutch cylinders would not fail so quickly if owners bled thru fresh fliud occasionly, when i first did mine it was black!

T-Cut · 28th April 2011, 22:49

Quote:

Originally Posted by drewbie

Im confident that slave and master clutch cylinders would not fail so quickly if owners bled thru fresh fliud occasionly, when i first did mine it was black!

That's rubber particles from the master seal. The underlying problem is the quality of the materials used to construct the master and slave cylinders. Regular fluid replacement will help lengthen their life IMO, but the basic issue can't be fixed except by swapping both for a better made version.

Slave = Freelander diesel fits all.
Master = ?? various DIY methods reported.

TC

craig8661 · 29th April 2011, 08:29

t cut why is the slave on the freelander better you thought they would have made it to fit all as a better part

T-Cut · 29th April 2011, 12:18

Quote:

Originally Posted by craig8661

t cut why is the slave on the freelander better you thought they would have made it to fit all as a better part

The Freelander slave is a well known solution to the 75/ZT issue. It is obviously made of better stuff and seems to be a long term fix.

TC

28th April 2011, 10:56	#1
craig8661 Posted a thing or two rover 75 tourer cdt Join Date: Feb 2011 Location: Chesterfield Posts: 1,924 Thanks: 3 Thanked 4 Times in 4 Posts	rover 75 master cylinder quick question just replacing the clutch in the cdt i thought the master cylinder was empty when i opend the lid there was like a rubber insert in it do i remove the rubber seal when fitted into the car its a luk part with a mg sticker on it. __________________ http://i984.photobucket.com/albums/a...y%20se/sig.jpg spoilt as i own a cdt auto connoisseur se cdt auto member 829 mods so far synergy 2 heated washer jets cant really add anything else as it has it all lol

28th April 2011, 16:25	#2
chris75 same car since 2005 2001 Rover 75 2.0 v6 Connoisseur Saloon Join Date: Nov 2006 Location: Ellesmere Port , Cheshire Posts: 3,811 Thanks: 379 Thanked 549 Times in 466 Posts	If it's what I think it is , leave it in ; it's there for a reason , to act as a vapour barrier and prevent the fluid absorbing water . It is often referred to as the "condom" on here . It is a flexible diaphragm which will shrink and swell to allow movement of fluid . Many folk on here have cut the bottom off it to allow the reservoir to hold more fluid , but it was fitted to at least the 400 and the 45 ranges before the 75 , without ever causing any problem . My own thinking is that if you need more fluid , you are better off finding the leak ! __________________ Who said it was simples ?

28th April 2011, 19:39	#5
craig8661 Posted a thing or two rover 75 tourer cdt Join Date: Feb 2011 Location: Chesterfield Posts: 1,924 Thanks: 3 Thanked 4 Times in 4 Posts	hi there i was going to refer to it as a odd shape condom lol its the clutch master cylinder. will i need to bleed this one or is it a case of clip the pipes together and go __________________ http://i984.photobucket.com/albums/a...y%20se/sig.jpg spoilt as i own a cdt auto connoisseur se cdt auto member 829 mods so far synergy 2 heated washer jets cant really add anything else as it has it all lol

29th April 2011, 08:29	#9
craig8661 Posted a thing or two rover 75 tourer cdt Join Date: Feb 2011 Location: Chesterfield Posts: 1,924 Thanks: 3 Thanked 4 Times in 4 Posts	t cut why is the slave on the freelander better you thought they would have made it to fit all as a better part __________________ http://i984.photobucket.com/albums/a...y%20se/sig.jpg spoilt as i own a cdt auto connoisseur se cdt auto member 829 mods so far synergy 2 heated washer jets cant really add anything else as it has it all lol

28th April 2011, 16:51	#3
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,752 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	MGR in their infinite wisdom believed the clutch system would last without any servicing of the hydraulics. So they sealed it for life. Trouble is it's not known for its longevity. TC

28th April 2011, 19:04	#4
drewbie Loves to post Rover 75 Club SE 1.8T 03 plate. Join Date: Jan 2009 Location: Tenterden Posts: 277 Thanks: 28 Thanked 41 Times in 37 Posts	The brake master doesnt need a 'condom', i think its only there so the whole unit can be sold as a ready filled off the shelf item. I removed mine and replaced it with an o ring. Bleed thru about 200ml yearly and fill to about 10mm from top of master.

28th April 2011, 20:45	#6
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,752 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	The condom can be removed provided you replace the hydraulic fluid on a (say) 2 yearly schedule. It does allow you to double the reservoir capacity. However, like brake fluid, it will slowly hydrate and become less efficient over time. The original idea was the prevent moisture absorption as a sealed for life system. TC

28th April 2011, 21:13	#7
drewbie Loves to post Rover 75 Club SE 1.8T 03 plate. Join Date: Jan 2009 Location: Tenterden Posts: 277 Thanks: 28 Thanked 41 Times in 37 Posts	Im confident that slave and master clutch cylinders would not fail so quickly if owners bled thru fresh fliud occasionly, when i first did mine it was black!