turbo brake/clutch - bleeding the system

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turbo brake/clutch - bleeding the system

Postby Tom » Mon Oct 06, 2008 10:31 pm

This may be a silly questionb but here goes...

I recently had the front and rear brake hoses replaced on my '88 GTA turbo. Now my clutch has lost nearly all pressure and only just disengages. I know the clutch master & slave cylinders are fed from the same reservoir as the brakes but can changing the brake hoses affect clutch performance at all?

It could of course just be a stuffed master or slave cylinder but I though it was a it of a coincidence that it started soon after getting the brakes done.


Next silly questions:

(1) I know there's a bleed nipple extension but if required, how the hell do you get at the slave cylinder itself?

(2) Where the hell is the clutch master cylinder? Car is RHD.

Also, there has been no loss of fluid from the reservoir as far as I can tell so maybe it's just air in the system (I hope so!!!)
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Postby clee » Tue Oct 07, 2008 7:38 am

If the fluid was drained completely when you did the brakes you may need to bleed the clutch .Get a pressure bleed system to do it though .
Master is on the clutch pedal ,you can see the plunger attached to the pedal ,check for any signs of fluid in the footwell .You can get to it fairly easily from under the car .
Slave is more awkward .The turbo and its mounting plate need to come off ,you'll see the slave on top of the bellhousing and then it's a 10 min job to swap .Get someone to pump the clutch and see if there are any signs of fluid dripping off the bottom of the bellhousing .
I'd look for leaks first then bleed the clutch .
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Postby Tom » Tue Oct 07, 2008 8:00 am

OK I'll try that. Thanks for the advice!
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Postby Tom » Wed Oct 08, 2008 3:11 am

OK - here's the situation.

previous owner had the slave re-sleeved about 2-3 years ago. Had the master replaced at the same time. Also did the brake master cylinder.

The brake/clutch mob who have my car are having a tough time bleeding the clutch system. Having no luck at all. They are suggesting bending the bleed nipple extension so that it comes upwards into the engine bay - rationale being that air bubbles should rise upwards during the bleeding process I guess. Could cause issues with heat generated by the turbo however....

Although - the seal/piston in a re-sleeved slave can still fail I suppose. Can't see it unfortunately without taking the turbo off.

There is no sign of weeping fluid at the master cylinder.

some guys recommend forcing fluid directly into the slave. not sure how this is done? Through the bleeder extension perhaps?

Who would have thought owning an Alpine could be this much fun :)
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Postby clee » Thu Oct 09, 2008 7:32 am

You will struggle to bleed it without a pressure system .Bending the pipe will make bigger all difference .The air lock ,if it is that ,will still need to be shifted. Pushing fluid up the bleed extension won't do any good ,the air still needs to be expelled somewhere and where would you do that .The extension pipe is there to make bleeding the slave easier .
Gunson easybleed ......even found a source in OZ for ya .........
http://www.minisport.com.au/prod38.htm
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Postby phildini » Thu Oct 09, 2008 3:37 pm

clee wrote:.......... easybleed ......even found a source in OZ for ya .........
http://www.minisport.com.au/prod38.htm


yes used that on my GTA and all my other cars..... brilliant!!!! :wink: :D :lol:
84 R5 Le Car2 Turbo, 95 Clio 16V mk1, 68 Alfa Romeo 1750 GTV, 99 Mitsubishi Evo VI, 06 Porsche Boxster, 11 Lotus Evora S
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Postby simontaylor » Thu Oct 09, 2008 10:49 pm

Gunson Ezebleed worked for me too and the bleed extension tube is below the car as normal.

When the engine was out one time I replaced the slave cylinder, so the cylinder and the extension pipe would have been completely empty. After the first go of bleeding....... the clutch worked fine.
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Postby cheslynjay » Sat Oct 11, 2008 7:44 pm

Clee could it be what happened to mine?
Slave cylinder or the clutch fork pin and bolt
gta turbo,navara pick up,grand scenic,laguna


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