Pull Type Clutch Won't Disengage

[iruvyouskyrine]

Hey all.

R34 GT-T gearbox with NPC carbotic single plate clutch. Was installed and running fine but engine died so it come out and is going on to the new engine. It looked in perfect condition when it came out.

So put it back in and now it will not disengage at all. Have bled/adjusted the pedal about 26 times now so I can confirm that it's not the issue. Pedal feel is excellent and I will attatch a video of clutch fork movement. Looking inside the box you can clearly see the release bearing pulling back the fingers of the pressure plate what looks like more than enough distance to disengage it.

As far as I am aware the only step you can gosh darn up in the install is putting the clutch itself in backwards? I didn't think it was possible but that's about the only thing I can think of.

Will having it in backwards make the clutch unable to be disengaged?

Any advice/help is appreciated. Thanks.

[iruvyouskyrine]

Should also say that it was working perfectly with the R32 clutch master previously but won't disengage with the R33 master I now use. But by the look of these videos I'm 99% sure it's not master cylinder issue.

[Ben C34]

Back in the day a mate and I replaced a clutch in a Gemini, put it in backwards and it wouldn't disengage. (We were 16 at the time)

It can happen!

[iruvyouskyrine]

Had a think about it and I'm sure it's impossible to put it on backwards as the clutch plate fouls the flywheel so

you can't bolt the pressure plate on.

[iruvyouskyrine]

Okay so it's something internal. Moved the clutch fork until it hit the front of the hole cut out in the bell housing aka absolute full clutch fork travel. Still will not disengage the clutch.

What could go wrong with the pressure plate/clutch plate to cause it to still be engaged even though the release bearing is pulling on the diaphragm?

[Ben C34]

Nothing. Except for maybe it being in backwards.

Either way you aren't going to be able to fox it from the outside. Face the facts and whip the box out.

Edited September 28, 2014 by Ben C34

[iruvyouskyrine]

I know that Benny boy. Just asking if there is any known issues before I beak it open, find everything looks fine and put it all back together and have it not work.

I hope it is something as simple as clutch plate backwards but when I touch stuff it never is. Just got me stumped that it won't disengage even though the release carrier is doing it's job.

[iruvyouskyrine]

I should know you are going to get snappy with me when you deal with people like Ron

[iruvyouskyrine]

Box out.

Clutch looks good (definitely on the correct way, like I said, impossible to put single plate on backwards) pressure plate looks good, flywheel good, carrier bearing good.

Box in.

Exactly the same problem.

gosh darn.

Broken box?

[iruvyouskyrine]

Okay.

Clutch master is actuating the slave about an inch and has excellent pedal feel the entire way to the floor, so I would say that is fine.

Clutch slave has a decent amount of throw and no leaks etc, so I think that's fine.

Clutch fork is all good, not bent/cracked etc and the pivot point is all good.

Carrier bearing looked fine no abnormal marks etc.

Clutch disc itself looked fine.

Pressure plate looked fine although I wasn't sure exactly what I was looking for, just looking for general abnormalities. Also the carrier bearing is pulling on the pressure plate diaphragm and is pulling it out as it should.

So everything appears to be in a working condition.

When the car is on jackstands it can be started in any gear and the wheels turn freely and change speed with acceleration. This would indicate the part of the gearbox is fine Imagine (not sure what part as I'm no specialist). I also started the car in 1st gear and drove it around no issues.

When it was driving I was unable to get it out of first though, I was applying a decent amount of pressure on the shifter but it just didn't want to come out of first.

So yeah I have been thinking about it for the last 4 days and have not come up with a single idea that hasn't had a logical conclusion as to why it can't be that part that isn't functioning correctly.

Cash reward offered to the first person that tells me what the issue to my problem is.

[MrStabby]

"I also started the car in 1st gear and drove it around no issues." how did you do that with an engaged clutch?

Or is your problem actually "gearbox will not shift out of first" rather than "clutch will not disengage" ?

[Ben C34]

Just crank in gear and off you go! Match revs for shifts.

I drove a Patrol like that for a week before I got a chance to replace slave cylinder. Made driving pretty interesting.

[MrStabby]

Hehe, dont know if i'd call that 'no issues'...

[iruvyouskyrine]

No issues as in the wheels were turning under engine load and the gearbox/clutch didn't turn into 1975333 different pieces.

[iruvyouskyrine]

May have found the cause, fingers crossed.

[White GTS-T]

And?

[iruvyouskyrine]

Spoke to Doug at NPC, the maker of my clutch. After I gave him all the information from the testing I have done he said the only thing it could be is a bent clutch plate. Da fark. How did that happen? Anyway.

He was kind enough to send me another one free of charge.

Put new clutch plate it and no change. Feels exactly the same as before. Can anyone recommend a gearbox place in Newcastle? I would rather slam my dick in a door for the next 48 hours than try and fix this piece of shit.

[iruvyouskyrine]

Cash reward still offered by the way.

[GTSBoy]

Pics of dick slamming in door not loading.

[Eclipsado]

Refloating this topic because i got the same issue and im getting crazy like hell, how you finally solved it? what was the problem??