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Location:
Sydney
Registered:
July 2003
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Sticky Clutch
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Thu, 06 January 2005 03:50
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Hey guys Im running a hipo 4agte witha dellow belhousing and a w55 gbox, problem is my clutch is sticky only when it warms up, its on its 2nd clutch in 2 months since the conversion so im curious to know what it is, all lines and seals are intact and the fluid is fine, i know that dellow made up a shorter than requested thrust bearing and carrier first they made it too long and then they made it tooo short, I dunno i just want my car to run proberly and be done with all this mechanical BS!
Help... I dont wana go thru another rip out and new clutch to have the same problem again in another month or two its costing me way too much in time and parts and gettin driven around till it gets fixed...
is it a dellow issue?? ive had a few cars and a few clutch failures but nothin like this...
anyone had issues with a dellow and similar symptoms??
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Registered:
May 2002
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Re: Sticky Clutch
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Thu, 06 January 2005 05:17
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Can you describe the "stickiness" better?
Do you mean that once warm your clutch is not fully disengaging when the pedal is depressed?
Does your clutch take up close to the floor when it seems to be working fine?
If you answered yes to both of the above I would think that the rod that sits between your slave cylinder and clutch fork needs to be a tiny bit longer (the dellow one is adjustable in length).
WARNING: this may not be your solution and when increasing the rod length be sure to check that there is still the correct amount of "freeplay" in the clutch fork as specified in your owners manual (usually between 4mm and 7mm in most cases measured at the clutch fork, this usually equates to about 18mm to 25mm at the pedal).
Without the freeplay your thrust bearing will be in contact with the clutch diaphragm and may be applying pressure to the diaphragm thus decreasing the clamp load of the clutch.
Out of interest what sort of clutch are you running and what sort of clamp load does the pressure plate have??
The clutch is quite a simple part of the car, it's just that so many different parts interact with each other that a small change in one area (i.e. some poor positioning of a component during manufacture  ) can have major consequences.
A friend who recently purchased a 13B turbo RX7 was having the above described problems, his was caused by dirty old fluid and air in the system, a proper bleed fixed his perfectly, but you sound like you have already covered this.
Hope you sort it out.
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Location:
Sydney
Registered:
July 2003
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Re: Sticky Clutch
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Thu, 06 January 2005 05:37
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yeah its a stock pressure plate and a brass button clutch i think maybe the rod is the answer may have to take a closer look.
yes to both it sticks when i lift of the clusch like there is a delay in disengaging, and sometimes it feels like it hasnt disengaged to well at all. makes it a pain to drive.
thanks for your help will let you know if it works out.
Cheers Will.
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Location:
tallahassee FL usOFa
Registered:
May 2002
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Re: Sticky Clutch
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Thu, 06 January 2005 14:09
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he asked if the clutch is "dragging" - not disengaging completly.
does it grind going into reverse? if not, it isn't dragging.
then you're described a mechanical hang up somewhere. the pressure plate, the tube the release/throwout bearing rides on, the clutch fork pivot, the slave cyl bore & piston, master cyl bore & piston, or the pedal linkage.
4 to 7mm at the fork is way too much play, and that is ONLY IF this things design has an adjustable rod or stop on the clutch fork & slave cylinder. does it have that adjustment there? if it doesn't have an adjustable stop, there will be almost ZERO clearance.
changing the rod length on non-adjustable designs will not do anything to help you. the slave piston stops where ever the pressure plate pushes it to, and that makes it self-adjusting.
the only time to change rod length is if the slave piston bottoms out with less then zero free play, or the slave piston is ready to pop out. thats all.
the pedal push rod is adjusted for free play and to let the piston return enough to vent to the reservoir.
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Location:
Sydney
Registered:
July 2003
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Re: Sticky Clutch
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Thu, 06 January 2005 22:50
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so that means my clutch is sticking because???
Sympotms again....
Clutch pedal when pedal is pressed it feels notchy and when pressed it is accompanied by a kind of strange whine and when you depress the pedal it has a sticky feel to it a delay as the pedal comes up you feel it kick and engage, its also taking up at very different points not always the same so its very difficult to drive.
any ideas guys.
any one heard or had something similar?
cheers Will
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Location:
Ballarat
Registered:
January 2005
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Re: Sticky Clutch
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Fri, 07 January 2005 02:03
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I had something simalar in my RA60 celica with a @!RC engine and 5 speed. Couldn't figure out what it was but ended up changing to a 1 tonne clutch with a ford failane pressure plate and replaced the spiggot bearing. got a realy heafty clutch now that you can realy feel when you depress the pedal. one thing you might want to check is that there is no movement on the gearbox input shaft. any slight movment (usually the spigot bearing) would be amplified through the whole clutch system.
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Location:
Sydney
Registered:
July 2003
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Re: Sticky Clutch
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Fri, 07 January 2005 02:26
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Sweet. Man I gota gota go over the whole thing again anyway just to make sure its all ok before i go ripping out the box for a new clutch.... but yeah strange.
Cheers Will.
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Location:
On your mum!
Registered:
May 2002
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Re: Sticky Clutch
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Fri, 07 January 2005 02:41
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As ke382TG has said make sure that the thrust bearing carrier slides along the sleeve freely AND that the clutch disc is able to move freely along the spline. ALSO make sure that the thrust bearing is in good condition and that it wasn't damaged when first installed.
One other thing to check is also how good the pedal moves within the pedal box IF the hole that the clutch pedal shaft swings in is elongated then it could cause sticking/jamming etc.
Apart form that - good luck.
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Location:
Sydney
Registered:
July 2003
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Re: Sticky Clutch
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Fri, 07 January 2005 03:08
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I think int might be something wth the bearing and carrier as the whine happens when it heats up a bit, but yeah.
gotta check it out this arvo thanks.
Cheers Will.
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