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Rb25Det Clutch Drama

707OEY
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707OEY Enthusiast

707OEY

Posted
Posted

having an issue with my clutch, put a brand new slave and master cylinder in my 33. clutch was perfect for around 600klms and then is started picking up right near the floor and now i can't even get it into gear.

just wondering if anyone knows what to look for?

my first opinion was air in the system, not being bled properly, but then it lasted 600klms..

anyone knows how to troubleshoot would really appreciate it..

Shane

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89CAL Grand Master

89CAL

Posted
Posted

I would bleed the master and slave just to make sure there is no air in the system, or a leak. Did you replace the clutch line?

I know the master and slave are new but new doesnt always mean it will work. better off catching it now if thats what it is and claiming waranty. If you bleed everything and then its still the same then you probably have a clutch problem. If it works all good then gradually goes away again then you have a problem somewhere between your pedal and the clutch fork. Fork is moving, but may not be moving through the full motion

89CAL Grand Master

89CAL

Posted
Posted

Well it sounds like your clutch hasnt started slipping, sounds like theres not enough travel to engage the pressure plate to disengage the clutch

so in that case.... some sort of pivot ball issue? I'm not sure what happens when the pivot ball fails, I know it leads to clutch issues. You could maybe grab a torch and pull the rubber boot for the fork aside and see if theres anything obvious. But I'm not sure how much you will see. How much travel does the slave have?

blind_elk Grand Master

blind_elk

Posted
Posted

Did you adjust the freeplay in the clutch pushrod?

You may also have cracked the pivot on the thrust fork so that it will open up when the pedal is depressed, reducing the ability of the thrust bearing to properly disengage the clutch.

bubba Grand Master

bubba

Posted
Posted

Well it sounds like your clutch hasnt started slipping, sounds like theres not enough travel to engage the pressure plate to disengage the clutch

so in that case.... some sort of pivot ball issue? I'm not sure what happens when the pivot ball fails, I know it leads to clutch issues. You could maybe grab a torch and pull the rubber boot for the fork aside and see if theres anything obvious. But I'm not sure how much you will see. How much travel does the slave have?

When you snap the pivot, the pedal will go to the floor and not come back up without help. Had to drive home like it was an 18spd road ranger box :laugh:

Luke Vincent Enthusiast

Luke Vincent

Posted
Posted

Yeah i had that happen to me recently and my clutch had only done about the same km's.. brand new.

I checked the pivot/fork, new slave+master.. everything appeared to be fine, so last weekend with a couple mates off came the box..

only to find that the pressure plate bolts where not done up, well i lie, 3 where.. 6 wherent.. so the plate was sitting on the piss...

Tightened them up and box back on, bam! no problems ;)

Who did ur clutch?

turboedsloth Grand Master

turboedsloth

Posted
Posted

Yeah i had that happen to me recently and my clutch had only done about the same km's.. brand new.

I checked the pivot/fork, new slave+master.. everything appeared to be fine, so last weekend with a couple mates off came the box..

only to find that the pressure plate bolts where not done up, well i lie, 3 where.. 6 wherent.. so the plate was sitting on the piss...

Tightened them up and box back on, bam! no problems ;)

Who did ur clutch?

What the hell! Who did your clutch??

89CAL Grand Master

89CAL

Posted
Posted

When you snap the pivot, the pedal will go to the floor and not come back up without help. Had to drive home like it was an 18spd road ranger box :laugh:

I should have known that lol...... Now that you've said it I feel like an Idiot for not remembering haha

I put some lube on mine when I put my box back in last time, no more squeaking, and the clutch feels a bit nicer :)

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