Hyundai Tiburon Forums banner

1 - 20 of 46 Posts

·
Registered
Joined
·
28 Posts
Discussion Starter #1
Good evening friend, new member/first post. I'm sure this has been discussed before and I've tried searching the forum but I haven't found anyone with the same problem I'm having with my 2007 Tiburon GT. It's got the 2.7 liter V6 with five speed manual transmission. Mileage: almost 102,000. My problem started about two weeks ago and is very strange and somewhat unexplainable... the clutch grabs quite violently when starting off in first (and reverse) gear and often will not fully disengage when the clutch pedal is fully pressed to the floor.

Symptom one: It first happened while driving one day; I was in fifth gear and when I needed to slow down, I pressed the clutch only to find the transmission difficult to pull out of gear to downshift. I came out, but I had to pull much harder than usual.

Symptom 2: A few drives later, when accelerating away from full stop about 1/2 through the clutch's release it grabbed very firmly and violently and nearly stalled the car. "Huh?" I thought? Sure enough, the next time I took off from first gear I very gently let the clutch out... it began to engage normally at first but upon further (and thereby firmer) release of the pedal, it suddenly grabs very jerkingly as if I'd just dumped the pedal. It will do this when backing up in reverse as well, and this leads to...

Symptom 3: The clutch will not completely disengage at times even though the pedal is completely pressed to the floor. Only noted in first gear and reverse; the car shifts up and down through the gear range perfectly smoothly during normal driving but when I back into a parking spot and it's time to stop, I'll find the clutch won't disengage even though the pedal is pressed... luckily the brakes are stronger than the engine! Same thing in first... if I drive forward slowly in first, press the clutch the car should glide to a stop but not so - it's still in gear somewhat (clutch can be made to slip with the brakes engaged) until it "breaks free" and releases). I have learned to anticipate this and will either pump the pedal a few times and ease the transmission out of gear into neutral before coming to a full stop. Not enough weirdness yet? Here's...

Symptom 4: Now the pedal doesn't seem to come all the way back up during shifting. I noticed today that after I took off from a stop (with the usual clutch grab in first) that after I shifted into second, the pedal didn't quite "feel right" when I let it out... it felt "mushy" and sure enough, a moment later I could feel a bump in the pedal as it popped out to it's fully raised position. If I press the clutch when the car is stopped or in neutral, this doesn't happen. Only when torque is applied to the transmission will the pedal be sticky on it's release.

Here is what I know for a fact:

There is nothing wrong with the slave or master cylinder. No clutch fluid leaks, full pedal travel. A press of the clutch pedal fully extends the slave cylinder, moving the clutch arm on the transmission it's full range of travel.

The clutch does not slip. I can go up steep hills in fifth gear and floor the engine and there will be no slippage.

The clutch pedal begins to grab very close to the floor (maybe two inches up) and is fully released about an inch from the end of it's travel. There are no unusual noises or smells.

I did not burn up my clutch. I'm not a "noob" in the ways of manual transmissions; it's all I've driven in 23 years of driving. The problem is I just bought this wonderful Tiburon last September with 98,500 miles on it and have no idea how the previous owner treated it... they could've been out there popping wheelies with it for all I know!

If any of these signs and symptoms sound familiar to you or if you've seen this kind of nonsense before, please help me narrow it down. In my heart of hearts, I think I need a new clutch but it doesn't make sense mechanically to me... a bad clutch disk should slip and mine does not. I suspect either my pressure plate is shot and binding or the transmission shaft isn't letting the throwout bearing/clutch disk float back & forth as it should because of warpage/burrs/no lubrication). This could explain the clutch grabbing or getting stuck. Please help...

-Pilotsteve
 

·
Registered
Joined
·
2,038 Posts
I know you mentioned that everything is alright with the slave cylinder but since you are having clutch issues look into the slave cylinder DIY. There is a spring in there that, once removed, make clutch engagement better.
 

·
Registered
Joined
·
28 Posts
Discussion Starter #4
Thanks for the help so far guys. I'll try bleeding clutch hydraulic system as it could explain th grabbing clutch and slow pedal return. It could also explain the clutch not fully releasing when the petals fully pressed, too. Question is, I just don't see how air could've gotten in there.

-Pilotsteve
 

·
Registered
Joined
·
741 Posts
That could be it, or it could be a matter of air getting in the system, but the brake/clutch fluid absorbing moister which then evaporates into air vapor within the lines. This is way more common in braking systems because of the vast amount of heat produced, but it is still entirely possible for the clutch as well. I'd start where suggested, and see if that helps.
 

·
Registered
Joined
·
28 Posts
Discussion Starter #7
Thanks, mayam and 6 cyl. I'll stop by the shop tomorrow afternoon when I get out of work and try bleeding it out and I'll let you know what happens. The funny thing is, if I press the pedal and observe the motion of the slave cylinder as it expands it's very smooth and there's no abrupt motion or "bumping" noticed. But, it's worth a shot and I'll definitely give a try.

My old man (who knows a thing or two about cars - he's worked on this whole life), is convinced that my clutch is shot. I hope he's wrong. Oh God... I hope he's wrong....

-Pilotsteve
 

·
Administrator
Joined
·
8,820 Posts
"Shot clutch" usually shows up as slip (as another, "Been there, done that oldtimer.....", like your father....).

It never hurts to bleed (fluid change) ANY hydraulic system, once a year or so.
Brake fluid absorbs moisture, this can lead to a host of issues down the road, even if you don't open any lines up.

It could also be the "clutch master cylinder to clutch slave cylinder" hose is showing it's age. When those lines age, they weaken, this means it swells with pressure rather than passing the pressure to the intended mechanical bit (slave cylinder in this case).
 

·
Registered
Joined
·
28 Posts
Discussion Starter #10
Thanks for the suggestions regarding the clutch master/slave cylinder interface but I really don't think there's anything wrong with the hydraulic system that operates the clutch in my Tiburon. Doggone it I wish that were the problem but I just don't know...

Take a look at this video I just made of the slave cylinder's motion. I put my phone onto the airbox pointing down, set it recording video, went into the car and worked the clutch for you to observe. I pressed it in & out a few times and simulated taking off from a stop with the last press or two. You can see how smoothly it moves with no jerking or bumps in it's motion:

Does the slave cylinder look like it's extending all the way to you? It looks like it could extend a bit further but don't know as I have nothing to reference it to - this is my first Hyundai. Thoughts?

Grrr... the system won't let me post a live link to the video I made until I've had more than five posts.

-Pilotsteve
 

·
Registered
Joined
·
28 Posts
Discussion Starter #14
Ron1n, I really don't have any problem shifting through the gears. The problem I'm having with the clutch grabbing only happens in first gear and in reverse. I have tried pumping the pedal before taking off from a stop and the clutch will still grab violently in first gear when taking off. When making my way through the gears, the transmission shifts smoothly. I have yet to grind the gears.

Wierd, huh?

-Pilotsteve
 

·
Registered
Joined
·
28 Posts
Discussion Starter #15
What an interesting day. I drove to work this morning and paid particular attention to the clutch operation. Pulling out of my parking spot with a cold engine and transmission, there was the usual grab in first gear and then everything was normal for the rest of the drive to work. It seems mysterious to me how the transmission grabs so violently halfway through the clock stroke only in first gear and yet is smooth throughout the gear shifting thereafter.

Of course, there was the ever present failure to disengage when shifting out of first gear and reverse. What the hell... this is starting to defy logic. A failed clutch should be just that, not intermittent in operation/failure.

-Pilotsteve
 

·
Registered
Joined
·
741 Posts
Does your clutch/tranny make any notable noises when depressing or releasing the clutch?
 

·
Registered
Joined
·
28 Posts
Discussion Starter #17
Nope. There are no unusual noises whatsoever. You'd think the grabbing clutch would occur every time the pedal is released but it doesn't. It is only felt when accelerating from a full stop... When I shift from first to second, second to third etc. the transmission shifts into gear as smooth as can be. You'd think I'd be grinding the gears if the clutch wasn't fully disengaging but not so.

Yesterday I was turning around to back into my parking spot and had to make a three point turn in order to do so... when I pushed the clutch to stop (1st gear) the car wanted to keep on moving even though the clutch pedal was mashed to the floor. The brakes obviously stopped the car but the rpm's dropped way down (idling engine) and the transmission was nearly impossible to pull out of first gear. Pump the pedal didn't help - I had to shut the car off to get it out of gear and stop this obviously precarious situation. Same thing in reverse (sometimes) and yet I can shift normally when city/highway driving. It just doesn't make sense!

-Pilotsteve
 

·
Registered
Joined
·
386 Posts
Hate to say it pilot, but I fear your dad is correct. This is typically a symptom of a problem with your pressure plate, the spings being broken..while bleeding the system can't hurt, I don't believe it will help you. You may have lots of material left on the clutch hence the lack of slip, but you will have to take it apart anyway to deal with the pressure plate issue..

Good luck!
 

·
Registered
Joined
·
28 Posts
Discussion Starter #19
Thanks for the wisdom, Tuscani. Kind of what I figured myself after really having gone over this mentally about a million times. Worst thing about it is, I've been driving the car for the last two days and it's actually seems to be getting a little bit better. Binding is not as severe as it was at first, but can also be caused by me being very very gentle and taking off. I barely let the RPMs get above 1200 and just ease the clutch out super gently. Far is it not grinding when I shift between the gears, it's probably a combination of speed shifting and my being very very gentling on the engine.

-Pilotsteve
 

·
Registered
Joined
·
28 Posts
Discussion Starter #20
Well guys I've pretty much parked the car until I can save up the money to get the clutch repaired. The problem is not so much the grabbing anymore, now the most severe problem is the fact that it will not come out of first or reverse gear. A full press of the pedal and full extension of the slave cylinder/throw of the clutch release lever does not disengage the pressure plate. Something is bent or broken in there, likely the springs that engage to the throwout bearing.

Time to order a clutch kit. Any suggestions on a good high-performance and long-lasting pressure plate/clutch disk?

-Pilotsteve
 
1 - 20 of 46 Posts
Top