Clutch Bleeding Problems

[Psymon]

I'm having problems bleeding the clutch on my R32 GTST. I've bled it so there's only clean fluid coming from all three nipples... no air... but there is still absolutely no pedal feel. Does anyone know whats going on???

[T04GTR]

ok. there a c**t if you get air in them.

i found you need to back off the master cylinder so theres heaps of freeplay. then bleed it normaly.

do the big pipe one first. then the slave.

[Psymon]

Well i'm guessing there's a lot of air in them as i've just done auto to manual conversion so all lines were installed with nothing in them.

What do you mean by "back off the master cylinder" ?

[shoei]

.... i've just done auto to manual conversion.....

were the master and slave cylinders new or second hand? use new ones, they may be faulty, dont buy these parts second hand.

[Cubes]

For your future reference aftermarket (Protec & PBR) clutch master cylinders and slave cylinders can be picked up for ~$70 and ~$40 respectively.

When bleeding the R32's clutch I start with the master cyl, then the center box and then the slave, then do it again.

I've had a few issues bleeding mine in the past so I removed the center box and length of lines. I simply bent the metal line that runs in to the box back 180degree's in to the rubber hose that runs to the slave cylinder. Works well and actually provided better clutch feel that makes driving a ceramic clutch just that little bit easier.

Some have suggested this center box and length of lines are there to help keep the clutch fluid cool. I'm not so sure; what temps does the clutch fluid really see? A half decent dot4 boiling point is ~250-270degree's, if fluid temp was really an issue they would have set up something similiar for brake lines that see much higher temps that a slave cylinder.

[manage13]

For your future reference aftermarket (Protec & PBR) clutch master cylinders and slave cylinders can be picked up for ~$70 and ~$40 respectively.

Hey Cubes, where from?? I'm having similar issues as Psymon!

Edited September 12, 2006 by manage13

[Cubes]

http://www.allclutchandbrake.com.au/

They are only in SA though.

They also recondition brake master cylinders for just over $100.

[Bl4cK32]

U can get dud new replacements though, as i found out. I replaced my master and bled it but it still had a slow leak ( put your foot on the pedal resting and it would drop slowly)

If the tiniest bit of dirt gets in, it can fark the seals.

I did buy a set for one of the guys interstate and posted them out to him, so i may be able to do it again if ppl didnt mind paying for my time/petrol to organise clutch master/slaves from all clutch and brake here in SA

[predator]

I got a IBS slave cylinder to fit an rb20 box and it was about $30 from a brakes place (any brakes / clutch place that can get IBS should be able to get it)..

http://www.skylinesaustralia.com/forums/in...slave+cylinder#

^^ All there

It's much easier to bleed if you spend $70 and get a one-piece braided clutch line as well to get rid of the twisty pipe.. then there is only two points to bleed.

[Cubes]

Predator;

Instead of the braided clutch line I simply removed the centerbox and bent the line 180degree's in to the rubber hose that runs to the slave cylinder.

Works well and is free.

EDIT: Checked the link.. I've just repeated myself. lol

[predator]

Instead of the braided clutch line I simply removed the centerbox and bent the line 180degree's in to the rubber hose that runs to the slave cylinder

you can do that as well if you like when going from auto to manual you have to track down / buy the extra bendy pipe.. in my case was easier for me to order a new one.

[Cubes]

Ahh yes..

So.. to send this thread off track..

Hows the RB25 feel in the r32 compared to the rb25 when it was in your old R33?

[manage13]

Psymon I hope you don't mind me highjacking your thread for a little while but I have a similar problem to you. Hopefully someone can help.

I have been bleeding my clutch for the past two weekends for more than a few hours. Yet the pedal pressure increases slightly however when the car is started the pressure of the pedal drops a little. I can’t see any visible leaks from the slave and I believe I have got rid of all the air pockets as I have bled the clutch more than a few times now. Can anyone hazard a guess to what my problem is? Has my slave had it?

Thanking everyone in advance.

[Duncan]

well in skylines the clutch has vacuum assistance when the motor is running, just like the brakes....is that all you are noticing?

[Bl4cK32]

I must be reading something wrong duncan? How does the clutch have vacuum assistance, if it doesnt have any vacuum lines going to it, and its a separate system?

[Duncan]

hmm OK I guess it might be GTR only...it has a vacuum line from the manifold to a small booster at the master cylinder. When the car starts the vacuum makes the clutch pedal noticably lighter.

[Beer Baron]

yeah it's GTR only.

[manage13]

hmm OK I guess it might be GTR only...it has a vacuum line from the manifold to a small booster at the master cylinder. When the car starts the vacuum makes the clutch pedal noticably lighter.

Hi Duncan, thanks for the reply.

The clutch is much lighter when the car is running however I can't select gears. Also my clutch used to rattle when the clutch pedal was pressed down now I hear no rattle. Any idea??

[chunkylover]

Did you try bench bleeding the master cylinder?

Sometimes when you try bleed it in the car when the master cylinder is new, and you keep pumping it, the cups inside the master cylinder can turn inside out.

So when you bleed it fuid still comes out when the nipple is open, and when you close it and pump the pedal, it doesnt hold pressure and the piston just passes through.

[T04GTR]

yeah. what cubes said. piss off the loop. just carfuly bend the thin pipe to meet up with the slave hose. it give a more posative feel to

just be careful not to kink the pipe