Jump to content
SAU Community

Recommended Posts

Hi all.

R32 gts-t.

R33 Gts-t clutch master cylinder

R34 GT-T clutch slave cylinder

NPC clutch.

Have bled the clutch multiple times but it doesn't seem to get full disengagement. I am unable to change gears very easily when the car is turned off. With the car idling up on jackstands it takes noticeable effort to put the car into gear witch my foot on the clutch fully depressed.

When it selects a gear the wheels start turning at the appropriate speed and you can feel that the clutch is not fully disengaged as even pushing against the the gear without selecting it the wheels start to turn.

I think this means a dodgy master cylinder correct? I bought a second hand one from an R33 and bled it up, there is definitely movement at the slave as you can see it move the fork maybe an inch or so but not enough to disengage the clutch.

Just wanting to confirm it is the master?

Thanks

Link to comment
https://www.sau.com.au/forums/topic/448489-suspect-failed-clutch-master/
Share on other sites

If your looking at the slave and it doesnt look like its pushing the fork enough then yeah its either your master or slave, but Im assuming your slave is new since you only mentioned the master was 2nd hand? Have you played around with the rod adjusment on the master?

Did you bleed the master then the slave? I think if you still have the standard loop line (which I think is used to cool the oil for some crazy reason) down at the slave then there is a block there with a bleed nipple also

At that stage it shouldnt matter but I would still bleed along the system just to be sure. Master ----> Line -----> Slave

I could be wrong about that loop line or you may not have it fitted, but have a look anyway

Hi new to sau so not sure if I can ask question here or start a new thread. So I apologise in advance if I'm wrong.

I am also having a clutch problem. I drove the car down the shops today heard a small noise like something broke and finding a gear after tht became progressivEly harder after that to the point where I can not select a gear. I eventually limped home I noticed the master cylinder resovoir was completely full of fluid. When previously fluid level was normal. Could this be also a master cylinder failure?

Clutch had seemed normal till then accept it was kinda squeaky.

I think my issue lies in trying to use a 33 clutch master with 34 pull type slave. No matter what I seem to do adjustment wise it just does not exert enough pressure on the slave to fully disengage the clutch.

Anyone successfully used a R33 master and 34 slave? Or can anyone else recommend something that has more pressure (I guess this is related to the bore size?) and still is short like the 33 item as I have a greddy forward facing plenum so need something nice and short.

Surely there is plenty of people out there with R33 masters in R32's?

Hi new to sau so not sure if I can ask question here or start a new thread. So I apologise in advance if I'm wrong.

I am also having a clutch problem. I drove the car down the shops today heard a small noise like something broke and finding a gear after tht became progressivEly harder after that to the point where I can not select a gear. I eventually limped home I noticed the master cylinder resovoir was completely full of fluid. When previously fluid level was normal. Could this be also a master cylinder failure?

Clutch had seemed normal till then accept it was kinda squeaky.

You may have broken the pivot ball or the pedal bracket. I believe these are the 2 most common problems in R33's

Edited by 89CAL

You may have broken the pivot ball or the pedal bracket. I believe these are the 2 most common problems in R33's

Not to sure about the pivot ball. I have broken one before probably 12 years ago in my s13 and completely different symptom. .. I also looked at the pedal bracket and all seemed ok there too. Only thing different is the reservoir is full to the top of brake fluid when previously it was in the normal range.

When my clutch master failed it produced noise before it eventually collapsed on it self and i could only get home in one gear.

The system is a pain in the arse. The whole loop is redundant. If you can get.your hands on a braided line id eliminate the entire loop and go straight to the slave. It would help you ensure you've bled correctly .

When my clutch master failed it produced noise before it eventually collapsed on it self and i could only get home in one gear.

The system is a pain in the arse. The whole loop is redundant. If you can get.your hands on a braided line id eliminate the entire loop and go straight to the slave. It would help you ensure you've bled correctly .

There was some noise previously was a profound squeak and then a clunk of sorts. It then got worse. Pedal still has pressure behind it it just doesn't engage clutch properly to allow me to select a gear or change gears.

The squeak is usually a sign of the cylinder not sealing properly or a worn spring. In my unit the spring snapped and the piston inside wasn't sealed causing the clutch to semi disengage and the excess fluid in the system to backwash into the reservoir.

OK.

So if you are confident that the system has been bled 100%, have checked for leaks then I think you need to grab a second person, get under the car and watch the slave cylinder to see what it is doing. If it looks like it is travelling a good distance (I think the throw is about 2cm? But someone correct me if I'm wrong, this is an educated guess)

If the slave is travelling the distance fine, then it may be a problem around the clutch itself. If the travel is not so good then it can only be slave, master or clutch pedal (adjustment, bracket etc)

If it were me, thats where I'd start

Yep have done this. It looks like it's moving it a good distance (around an inch) but it still won't disengage. It is a pull type clutch and the equivalent of the throw out bearing engaged properly on the fingers of the clutch cover.

Have tried 2x R33 masters now and both have the same issue. Also the shank on the bolt that connects to the clutch pedal on the R32 master is longer than the R33 one. So i put the 32 one on the 33 and tried that hoping it would exert more pressure on the slave, but even this didn't work.

Might just have to shell out the $140 for an R34 master :(

Wait wait. You say the slave is moving a a good distance, and an Inch sounds about right. But you are still looking at the master?

If the slave is moving that far, it sounds like you have a problem AFTER the slave. Maybe you are hoping not, because pulling the box off is a big job, but I think you are wasting your time with the master at this point. You need to look inside at the clutch/fork/throwout bearing etc. You might be able to peel the boot away enough to have a look inside.

I understand what you are saying but it requires lots of effort to try and move the clutch fork, and I heard it engage on the fingers of the clutch cover. I will try and have a look but I really think that everything inside the clutch is fine, just a gut feeling.

Even though the slave is moving it feels like I have replaced the pedal with a wet fish, that's about how much feel the pedal has.

I had the same issue when i first installed my clutch. i adjusted the pedal and it selected gears fine.

If the master doesn't return to the correct point in it's stroke it will cause all sorts of problems. I agree, adjusting the pedal is where i would start. I have had many head scratching moments caused by this.

Can you look inside the bellhousing and check the thrust bearing?

  • 6 years later...
On 17/09/2014 at 11:31 AM, iruvyouskyrine said:

I understand what you are saying but it requires lots of effort to try and move the clutch fork, and I heard it engage on the fingers of the clutch cover. I will try and have a look but I really think that everything inside the clutch is fine, just a gut feeling.

Even though the slave is moving it feels like I have replaced the pedal with a wet fish, that's about how much feel the pedal has.

Did you get this sorted? I am in the same position. R34 bigbox with a pull clutch and a R33 master. Pedal basically drops to the almost the floor then starts working. Does not return under its own power.

This is a new build as such, conversion from auto. I am pretty sure I have bleed the master and slave, at least I can not get any more air out.

Edited by elohim_imanu

Yes, RB30 crank is like ~3mm longer than RB25. This caused the tube that the throw out bearing slides on to physically push the centre of the clutch disk into the flywheel. 

Which basically means that i was never able to disengage the clutch.

Trimmed 5mm from the end of the tube and never had an issue again

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Can I suggest you try EBC directly again and link them to as many competitor catalogues as you can to show their listing is incorrect, eg https://dba.com.au/product/front-4000-series-hd-brake-rotor-dba42304/ If you have access to an R33 GTST VIN and your VIN, you could also use a Nissan Parts lookup like Amayama to show them the part number is different between 33 GTST and 34 GTT which may get their attention
    • So i got reply from EBC and they just this site where you can clearly see those 296mm fronts on R34 GTT. I send them photos and "quotes" that 296mm are not for 34 GTT and they are too small. But it will be very hard to return them cuz nobody here knows 100% and they just copy those EBC catalogue :-D https://ebcbrakesdirect.com/automotive/nissan/skyline-r34
    • Hi, is the HKS  Tower Bar still available ? negotiable ? 🤔
    • From there, it is really just test and assemble. Plug the adapter cables from the unit into the back of the screen, then the other side to the car harness. Don't forget all the other plugs too! Run the cables behind the unit and screw it back into place (4 screws) and you should now have 3 cables to run from the top screen to the android unit. I ran them along the DS of the other AV units in the gap between their backets and the console, and used some corrugated tubing on the sharp edges of the bracket so the wires were safe. Plug the centre console and lower screen in temporarily and turn the car to ACC, the AV should fire up as normal. Hold the back button for 3 sec and Android should appear on the top screen. You need to set the input to Aux for audio (more on that later). I put the unit under the AC duct in the centre console, with the wifi antenna on top of the AC duct near the shifter, the bluetooth antenna on the AC duct under the centre console The GPS unit on top of the DS to AC duct; they all seem to work OK there are are out of the way. Neat cable routing is a pain. For the drive recorder I mounted it near the rear view mirror and run the cable in the headlining, across the a pillar and then down the inside of the a pillar seal to the DS lower dash. From there it goes across and to one USB input for the unit. The second USB input is attached to the ECUtec OBD dongle and the 3rd goes to the USB bulkhead connected I added in the centre console. This is how the centre console looks "tidied" up Note I didn't install the provided speaker, didn't use the 2.5mm IPod in line or the piggyback loom for the Ipod or change any DIP switches; they seem to only be required if you need to use the Ipod input rather than the AUX input. That's it, install done, I'll follow up with a separate post on how the unit works, but in summary it retains all factory functions and inputs (so I still use my phone to the car for calls), reverse still works like factory etc.
    • Place the new daughterboard in the case and mount it using the 3 small black rivets provided, and reconnect the 3 factory ribbon cables to the new board Then, use the 3 piggyback cables from the daughterboard into the factory board on top (there are stand offs in the case to keep them apart. and remember to reconnect the antenna and rear cover fan wires. 1 screw to hold the motherboard in place. Before closing the case, make a hole in the sticker covering a hole in the case and run the cable for the android unit into the plug there. The video forgot this step, so did I, so will you probably. Then redo the 4 screws on back, 2 each top and bottom, 3 each side and put the 2 brackets back on.....all ready to go and not that tricky really.      
×
×
  • Create New...