Lost Clutch Hydraulics

Discussion and technical advice for 84-89 AW10 & AW11 MR2. 3A-LU, 4A-GE, 4A-GZE.

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JamesDaniel80
Posts: 32
Joined: Mon Sep 16, 2013 8:16 pm
Location: Eastbourne, UK

Lost Clutch Hydraulics

Post by JamesDaniel80 »

Hi everyone - some advice please!

Over the last few weeks, my clutch pedal has been getting more and more spongy.

It's more noticeable at the start of my journey and gets better the more I use it but this morning, I couldn't get it into gear and on looking at the clutch fluid reservoir, it was lingering around half way.

Is there a weak point that usually goes with the clutch hydraulics so I know where I might start looking for a leak?

Or is it likely to be the slave or master cylinder?

Cheers!

James
James

1987 MR2 MK1b
2002 Audi S3 Quatro
LimeyMk1
IMOC Committee
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Location: Gosport

Re: Lost Clutch Hydraulics

Post by LimeyMk1 »

1st check for me would be the slave cylinder seals, pop the boot back and if it's leaking it will be pretty obvious.

Master cylinder you'd most likely be able to smell it as they tend to drip onto the base of the steering column under the clutch pedal. If it's the Master cylinder check and clean the universal joint on the steering column as the clutch fluid will eat the rubber padding in the joint and that's £90 from Toyota to replace (about 10 years ago).
JamesDaniel80
Posts: 32
Joined: Mon Sep 16, 2013 8:16 pm
Location: Eastbourne, UK

Re: Lost Clutch Hydraulics

Post by JamesDaniel80 »

Thank you!

That's my weekend sorted :-)
James

1987 MR2 MK1b
2002 Audi S3 Quatro
JamesDaniel80
Posts: 32
Joined: Mon Sep 16, 2013 8:16 pm
Location: Eastbourne, UK

Re: Lost Clutch Hydraulics

Post by JamesDaniel80 »

Turns out it is the master cylinder.

Most of my clutch hydraulic fluid has ended up under the carpet in the drivers footwell!

At least it's an easy fix!
James

1987 MR2 MK1b
2002 Audi S3 Quatro
LimeyMk1
IMOC Committee
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Re: Lost Clutch Hydraulics

Post by LimeyMk1 »

May be worth changing the seal on the slave cylinder piston while the system is drained.

Did the UJ stay free of clutch fluid?
JamesDaniel80
Posts: 32
Joined: Mon Sep 16, 2013 8:16 pm
Location: Eastbourne, UK

Re: Lost Clutch Hydraulics

Post by JamesDaniel80 »

UJ?
James

1987 MR2 MK1b
2002 Audi S3 Quatro
elbon50
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Joined: Sat Sep 12, 2009 10:29 am
Location: Stafford

Re: Lost Clutch Hydraulics

Post by elbon50 »

JamesDaniel80 wrote:UJ?


Chris is referring to the universal joint on the steering column
Peter

1989 MR2 Mk1 NA T-bar
1998 Ssangyong Korando GLS
2011 Honda Civic Type R
JamesDaniel80
Posts: 32
Joined: Mon Sep 16, 2013 8:16 pm
Location: Eastbourne, UK

Re: Lost Clutch Hydraulics

Post by JamesDaniel80 »

Ah.

No, it's just a small leak that I can see coming from the rubber seal where the clutch pedal attaches to the master cylinder.

I can still drive it after pumping the pedal a few times at the start of a journey to build the pressure but it's only going to get worse so I've ordered a replacement cylinder.

Hopefully that'll sort it.
James

1987 MR2 MK1b
2002 Audi S3 Quatro
elbon50
Posts: 3598
Joined: Sat Sep 12, 2009 10:29 am
Location: Stafford

Re: Lost Clutch Hydraulics

Post by elbon50 »

A new cyl should sort it OK James

Rather an expensive method though

I would strip & clean the cyl internally

Then fit a set of new seals
Peter

1989 MR2 Mk1 NA T-bar
1998 Ssangyong Korando GLS
2011 Honda Civic Type R
stenky
Posts: 356
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Location: Slovakia

Re: Lost Clutch Hydraulics

Post by stenky »

You have to be a jew
Image
boondougal
Posts: 520
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Location: Shavington (near Crewe)

Re: Lost Clutch Hydraulics

Post by boondougal »

stenky wrote:You have to be a jew


8-[ 8-[ 8-[ 8-[ 8-[ 8-[
elbon50
Posts: 3598
Joined: Sat Sep 12, 2009 10:29 am
Location: Stafford

Re: Lost Clutch Hydraulics

Post by elbon50 »

stenky wrote:You have to be a jew


I get far more satisfaction from a successful repair than a simple replacement
Peter

1989 MR2 Mk1 NA T-bar
1998 Ssangyong Korando GLS
2011 Honda Civic Type R
JamesDaniel80
Posts: 32
Joined: Mon Sep 16, 2013 8:16 pm
Location: Eastbourne, UK

Re: Lost Clutch Hydraulics

Post by JamesDaniel80 »

Well...I've managed to source one for £22 posted so I'm happy.

I think I'd get more satisfaction out of driving it and being able to change gear hassle free.
James

1987 MR2 MK1b
2002 Audi S3 Quatro
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Lauren
IMOC Committee
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Re: Lost Clutch Hydraulics

Post by Lauren »

stenky wrote:You have to be a jew


This is not an acceptable term to use on IMOC. Please don't do it again.
2020 GR Yaris - Circuit Pack :lover:
stenky
Posts: 356
Joined: Wed Mar 23, 2011 9:04 pm
Location: Slovakia

Re: Lost Clutch Hydraulics

Post by stenky »

Lauren wrote:
stenky wrote:You have to be a jew


This is not an acceptable term to use on IMOC. Please don't do it again.
You are right. No jews should have been insulted with my pesky comment, as I only tried to mock Peter 😛 I am sorry for that.
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