S2000 Under The Hood S2000 Technical and Mechanical discussions.

Sticky clutch keeps coming back

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Old Feb 18, 2013 | 02:19 PM
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Default Sticky clutch keeps coming back

After i did my clutch replacement (about 2k miles or so) my clutch pedal became pretty hard and sticky at the bottom. My slave went out and it was replaced and bled. It helped for awhile and then got hard and sticky slowly throughout the next 50 miles or so. I tried lubing the back of the clutch pedal pin that goes into the clutch master cylinder with no luck. I found out that giving it a near redline shift will make the clutch pedal extremely soft without any stickiness. It then becomes slowly hard and sticky about 30-50 miles later. I then completley bled the fluid completley (fluid was very old) but when i was bleeding it with a autobleeder i noticed some fluid coming out of the metal hose where it takes a 90 degree turn and shortly turns into the rubber hose connected to the slave cylinder. Could i be getting air in the system? I even tried tightening that joint with no luck
This was dripping when i was using a vaccum bleeder and had pressure before i opened the bleeder. It seems the pressure was enough to leak out. Was completley dry before bled
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Old Feb 19, 2013 | 09:27 AM
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nothing?
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Old Feb 19, 2013 | 10:07 AM
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I experience the same thing, but after high rpms mine actually drops all they way to the floor, and then I gotta pump it back up. Didn't find a fix yet.
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Old Feb 19, 2013 | 11:06 AM
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Just talked to my local honda tech. He said it could possibly be the pressure plate. Buildup or something. Or as simple as air in the system.
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Old Feb 19, 2013 | 11:24 AM
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If the release bearing guide was not fully cleaned and lubed it can build up a coating of old grease and friction material that can prevent smooth movement. I found that after a dealership pulled a non OEM clutch that was very dirty/worn and put it back together without a good cleaning there was a problem. After cleaning and lube it was reassembled with an OEM FD and it has been fine for many years.
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Old Feb 19, 2013 | 12:00 PM
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i've noticed this too with my car. a redline shift will make it smooth again
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Old Feb 19, 2013 | 01:22 PM
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Originally Posted by cdelena
If the release bearing guide was not fully cleaned and lubed it can build up a coating of old grease and friction material that can prevent smooth movement. I found that after a dealership pulled a non OEM clutch that was very dirty/worn and put it back together without a good cleaning there was a problem. After cleaning and lube it was reassembled with an OEM FD and it has been fine for many years.
What exactly is the realease bearing guide you speak of? Throwout bearing? I lubed everything the Honda manual instructed when clutch was replaced
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Old Feb 19, 2013 | 01:53 PM
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I am having similar problems. Mine gets sticky when pressed down halfway then it pops, and only does it when car is warmed up. If I shift at higher rpm, the stickiness/popping isn't as bad. I have greased where the fork touches T/O bearing, the slave cylinder push rod. Master cylinder, clutch disc, pressure plate, flywheel, and throwout bearing are 2,000 mile old. Just bled the clutch again yesterday. No luck.

Seems like I have to have the tranny drop to see what's going on inside... :/ One good possibility is this:
https://www.s2ki.com/s2000/topic/441...st__p__9230183
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Old Feb 20, 2013 | 07:55 AM
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Originally Posted by Brndon
Originally Posted by cdelena' timestamp='1361305443' post='22348529
If the release bearing guide was not fully cleaned and lubed it can build up a coating of old grease and friction material that can prevent smooth movement. I found that after a dealership pulled a non OEM clutch that was very dirty/worn and put it back together without a good cleaning there was a problem. After cleaning and lube it was reassembled with an OEM FD and it has been fine for many years.
What exactly is the realease bearing guide you speak of? Throwout bearing? I lubed everything the Honda manual instructed when clutch was replaced
The guide is the hollow tube that the TO/FD slide on. If you cleaned and lubed it as shown in the manual I would guess this is not your problem. It was in a bellhousing with very heavy build-up of friction material that I saw the issue.
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Old Feb 21, 2013 | 05:46 AM
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^ agree..
When I replaced my clutch kit for the first time I used the wrong grease in reassembling the release bearing and after only 10,000 miles I had to drop the transmission and replace the release bearing and release bearing guide due to wear due to the grease I used did not hold up to the high temps and got hard and sticky. Use only Super High Temp Urea grease and make sure to completely fill the valley in the release bearing with the new grease and replace the guide if any wear is evident. Also make sure the spline the friction disk rides on is not rusty and properly greased too. The disk has to slide freely on it.
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