Notices
Series I Trouble Shooting This is the place to learn more about or discuss any issues you're having with your RX-8

Weirdest Clutch Problem

Thread Tools
 
Rate Thread
 
Old Sep 5, 2010 | 01:53 AM
  #1  
tasex's Avatar
Thread Starter
Occupation: Converting O2
 
Joined: Nov 2008
Posts: 53
Likes: 0
From: Paramus NJ
Weirdest Clutch Problem

Hey guys
I've been having a constant clutch battle with my car and though I absolutely love it, after around a thousand in repairs and no real results I'm here to beg for a solution!
(long story so head to the last paragraph for most current problem)

I left for the winter and left my car, it was undriven but was turned on from time to time.
I came back and felt that the cluth was engaging extremely high. I went to my a reputable mechanic in the area and was told it was the clutch. Okay, so the clutch was replaced with an oem one. It ran fine until i took a two hour drive out the next week and the pedal height started extending and the engagement point went back up until the point it was undriveable since the connection was at the tippy top. ( felt like i was going to break the car)

I went back to the mechanic and I had to replace the slave cylinder, he warned me it could also be my master. Replaced the slave cylinder, and the clutch felt much more solid. The engagement was just as good but the sweet spot was much larger than before. Same problem happened again.

So pretty much what im left with after a new clutch and slave cylinder is a car with a perfect clutch for the first 20-30 minutes of the ride. After that the texture change (it kicks hard at the bottom and theres a notch at the top were it completely engages).
If i let the car sit for an hour or two it fixes itself. The car has only 40k on it and im already experiencing some weird problems. Please help!!

other notes
- has pedal bracket welded (thought that was the problem but that solved nothing

hope you guys can solve this problem... i dont want to get a new master cylinder only find that it doesn't fix the problem... what else can it be!
Reply
Old Sep 5, 2010 | 12:13 PM
  #2  
VashGS's Avatar
Zoom Zoom Addict
 
Joined: May 2010
Posts: 454
Likes: 0
From: Texas Hill County
Sounds like they botched the clutch job maybe. Reputable mechanic? You mean a shop with a lift & great tools or shadetree? When doing a clutch job only a transmission shop or dealer should touch the car. Unless they are YOU or a mazda speciality shop. Otherwise shadetree like leave out part or misalign stuff, get grease on the clutch wheel, fail to check the flywheel etc.
Reply
Old Sep 5, 2010 | 03:09 PM
  #3  
tasex's Avatar
Thread Starter
Occupation: Converting O2
 
Joined: Nov 2008
Posts: 53
Likes: 0
From: Paramus NJ
Originally Posted by VashGS
Sounds like they botched the clutch job maybe. Reputable mechanic? You mean a shop with a lift & great tools or shadetree? When doing a clutch job only a transmission shop or dealer should touch the car. Unless they are YOU or a mazda speciality shop. Otherwise shadetree like leave out part or misalign stuff, get grease on the clutch wheel, fail to check the flywheel etc.
My mechanic might be in his fifties but this japanese guys is the authority in rotary cras. He has his own 20b cosmo sitting in the back so I with positive intent assumed i doubt it could be a bad clutch install.

This problem is so weird I've never experienced anything like it before
Reply
Old Sep 5, 2010 | 03:47 PM
  #4  
zoom44's Avatar
Administrator
 
Joined: Jul 2002
Posts: 21,958
Likes: 115
From: portland oregon
well what did he say about the current issue?
Reply
Old Sep 5, 2010 | 07:13 PM
  #5  
tasex's Avatar
Thread Starter
Occupation: Converting O2
 
Joined: Nov 2008
Posts: 53
Likes: 0
From: Paramus NJ
Originally Posted by Charles R. Hill
Zoom, it might help to make a sticky thread regarding this issue as it is becoming more and more prevalent. Meanwhile, I will call around the clutch industry next week as I have a hunch about something.
the good guy/bad guy thread is right!
mr charles your a hero!
Reply
Old Sep 5, 2010 | 07:14 PM
  #6  
tasex's Avatar
Thread Starter
Occupation: Converting O2
 
Joined: Nov 2008
Posts: 53
Likes: 0
From: Paramus NJ
Originally Posted by zoom44
well what did he say about the current issue?
hes on a honey moon in japan but before he left he said it could possibly be the slave cylinder. I didn't have time to leave the car with ihm since i had to leave for a business trip. =(
Reply
Old Sep 5, 2010 | 07:16 PM
  #7  
Jon316G's Avatar
Grasshopper
iTrader: (1)
 
Joined: Dec 2006
Posts: 6,779
Likes: 50
From: Streetsboro, OH
Originally Posted by Charles R. Hill
Meanwhile, I will call around the clutch industry next week as I have a hunch about something.
Care to share what your hunch is?
Is this something I can test out on my end?
Reply
Old Sep 5, 2010 | 07:59 PM
  #8  
Jon316G's Avatar
Grasshopper
iTrader: (1)
 
Joined: Dec 2006
Posts: 6,779
Likes: 50
From: Streetsboro, OH
Originally Posted by Charles R. Hill
No, and, no. Sorry, Dude.
Alrighty then... I'll just continue my own troubleshooting until we hear back...
Reply
Old Sep 6, 2010 | 08:40 AM
  #9  
olddragger's Avatar
Registered
iTrader: (3)
 
Joined: Apr 2004
Posts: 10,828
Likes: 40
From: macon, georgia
my hunch is several hunches
1- air in the clutch hydraulics/master cylinder. The slave is in a awkward position and most people do not bleed it. As the car and clutch etc warms up that air expands and causes the hydraulics to change.
2- I have found this also when the lock nut on the clutch adjustment is not properly tighten. Its weird but that engagement variable has happened to me because of that. I dont understand that one but it did happen to me. My symptoms we not as pronounced as what is being said by the op.
OD
Reply
Old Sep 6, 2010 | 11:12 PM
  #10  
tasex's Avatar
Thread Starter
Occupation: Converting O2
 
Joined: Nov 2008
Posts: 53
Likes: 0
From: Paramus NJ
Originally Posted by olddragger
my hunch is several hunches
1- air in the clutch hydraulics/master cylinder. The slave is in a awkward position and most people do not bleed it. As the car and clutch etc warms up that air expands and causes the hydraulics to change.
2- I have found this also when the lock nut on the clutch adjustment is not properly tighten. Its weird but that engagement variable has happened to me because of that. I dont understand that one but it did happen to me. My symptoms we not as pronounced as what is being said by the op.
OD
Thanks man!
Ive tried bleeding the clutch but is that hte same thing as bleeding the master cylinder?
Reply
Old Sep 6, 2010 | 11:16 PM
  #11  
Jon316G's Avatar
Grasshopper
iTrader: (1)
 
Joined: Dec 2006
Posts: 6,779
Likes: 50
From: Streetsboro, OH
Originally Posted by tasex
I've tried bleeding the clutch but is that hte same thing as bleeding the master cylinder?
Ummm... no.
The master clutch cylinder doesn't have a bleed valve... only the master brake cylinder.
Obviously, the brake cylinder has nothing to do with the clutch line.
Only way to bleed the clutch is through the slave cylinder.
Reply
Old Sep 7, 2010 | 09:24 AM
  #12  
olddragger's Avatar
Registered
iTrader: (3)
 
Joined: Apr 2004
Posts: 10,828
Likes: 40
From: macon, georgia
uhhhhh---bleeding the master cylinder is always a good idea. Later model rx8's do not have a bleed screw on the master cylinder but the 04 and 05 do.
I know the clutch is a different system--so to speak, but the master cylinder provides fluid to both clutch and brakes. Its simple to do and it never hurts to eliminate all sources of possible air.
OD
Reply
Old Sep 8, 2010 | 12:54 AM
  #13  
tasex's Avatar
Thread Starter
Occupation: Converting O2
 
Joined: Nov 2008
Posts: 53
Likes: 0
From: Paramus NJ
Bled the brakes and master cylinder no luck =(
Reply
Old Sep 15, 2010 | 12:04 PM
  #14  
tasex's Avatar
Thread Starter
Occupation: Converting O2
 
Joined: Nov 2008
Posts: 53
Likes: 0
From: Paramus NJ
Originally Posted by Charles R. Hill
There is a joke about girls in there, somewhere......
Hey mr charles any word? I'm sick of daily driving my Honda
Reply
Old Sep 15, 2010 | 07:31 PM
  #15  
DocBeech's Avatar
I drive at Red Line.
iTrader: (1)
 
Joined: Jul 2010
Posts: 2,137
Likes: 5
From: Dallas, TX
so I'm taking it this is something specific to a non oem pressure plate?
Reply
Old Sep 15, 2010 | 07:40 PM
  #16  
Rote8's Avatar
Registered
 
Joined: Oct 2007
Posts: 1,574
Likes: 2
From: Boosted...
Originally Posted by Charles R. Hill
The problem I am dealing with involves lessening pressure plate clamping force as RPMs rise, and it won't be something that is fixed with the tranny still installed. Won't have anything until next week, at the earliest.
Isn't that called "boost"?


Reply
Old Sep 15, 2010 | 09:12 PM
  #17  
TeamRX8's Avatar
Registered
iTrader: (25)
 
Joined: Apr 2005
Posts: 26,936
Likes: 2,141
OT request; HITF does this thread end up tagged with "convert" and "Islam"?????

Reply
Old Sep 17, 2010 | 08:46 AM
  #18  
Rote8's Avatar
Registered
 
Joined: Oct 2007
Posts: 1,574
Likes: 2
From: Boosted...
Originally Posted by Charles R. Hill
I wtf you are talking about.

"involves lessening pressure plate clamping force as RPMs rise"

Add enough boost or nitrous and any clutch will slip.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
WranglerFan
New Member Forum
4
May 31, 2022 07:51 AM
Carbon8
RX-8's For Sale/Wanted
42
Feb 27, 2020 08:39 AM
GARCIAC951
Series I Tech Garage
8
Sep 10, 2015 07:17 PM
ed0128
New Member Forum
7
Sep 9, 2015 04:50 PM
Kim Jong Illest
Series I Trouble Shooting
3
Sep 4, 2015 04:27 PM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -5. The time now is 08:54 AM.