Clutch issues - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Suspension, Brakes, Drivetrain discuss the wondrous effects of boost and your miata...

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 12-12-2011, 04:09 PM   #1
Junior Member
Thread Starter
iTrader: (3)
 
Join Date: Nov 2007
Location: Boston / '90 Mariner Blue
Posts: 310
Total Cats: 14
Default Clutch issues

I'm no longer searching, 'cause I've been through this one too many friggin' times, and, the 8-lbs sledge could use a little workout.

Here's the skinny.
Clutch is FM's old 1.6L 300ft/lbs. Car doesn't put nowhere near that.
(ACT Xtreme plate with SS performance disc).

I've replaced the hydraulics just a few months ago, but, I still suspect either the master or the slave.
Flushed it, but, the car still won't shift into gear.

Pedal is good, no play, the rod is out nearly all the way, and, seems like the slave piston moves a good amount.

Yet, no cigar. I started losing clutch very gradually, until, right now, there's no way to shift once the car is running.

I've got the rebuild kits on the way, and, several spares to work on (One master and several slaves).
Rubber line has been replaced with SS, and, fluid is ATE.

My mechanic says it's a bad plate, but, it's been replaced by ACT just a few months ago. Besides, he's been wrong about my car before.

Anyone has any bright ideas?
Or, do you agree that it's the hydraulics?
alik is offline   Reply With Quote
Old 12-12-2011, 04:11 PM   #2
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,892
Total Cats: 1,792
Default

you sure the rod is adjusted properly? doesn't sound like it's disengaging.

the ACT will disengage off the floor, like 1" or so, adjust it too far out and it won't at all.
Braineack is offline   Reply With Quote
Old 12-12-2011, 04:13 PM   #3
Elite Member
iTrader: (12)
 
Join Date: Apr 2008
Location: Springfield IL
Posts: 2,750
Total Cats: 24
Default

Pull the trans and check the fingers on the clutch. Might have a spring broke or the throw out bearing out of place.
chpmnsws6 is offline   Reply With Quote
Old 12-12-2011, 04:23 PM   #4
Elite Member
iTrader: (11)
 
Join Date: Feb 2009
Posts: 2,982
Total Cats: 10
Default



Did you follow the FM clutch adjustment guide? If not, then do that first.
miatauser884 is offline   Reply With Quote
Old 12-12-2011, 04:49 PM   #5
Elite Member
iTrader: (10)
 
soviet's Avatar
 
Join Date: Jan 2010
Location: VA
Posts: 3,519
Total Cats: 259
Default

Check if your clutch hydraulic system is leaking anywhere. I had the exact same issue with new master/slave cylinder. It turned out to be a small leak at the clutch line because I didn't tighten it all the way. It was a very small leak but just enough to not hold all the pressure. Clutch pedal felt good etc but would not disengage all the way until I tightened the clutch line fittings.
soviet is offline   Reply With Quote
Old 12-12-2011, 04:50 PM   #6
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,892
Total Cats: 1,792
Default

might as well pull back the slave boot and see if it's full of fluid.
Braineack is offline   Reply With Quote
Old 12-12-2011, 04:57 PM   #7
Newb
 
Join Date: Aug 2011
Posts: 12
Total Cats: 0
Default

I think the OP said the slave is moving "a good amount". I assume that means you're watching it move while somebody else is pushing the pedal? I believe it needs to move 1-2cm, but somebody else should confirm. That would rule out your hydro probs if you can watch it moving.
deeno is offline   Reply With Quote
Old 12-12-2011, 05:05 PM   #8
Junior Member
Thread Starter
iTrader: (3)
 
Join Date: Nov 2007
Location: Boston / '90 Mariner Blue
Posts: 310
Total Cats: 14
Default

Fluid isn't leaking. At least, no puddles, and, no level dropping in the master.
I've played with the adjusting rod both ways. No cigar.
Yep, I've glanced at the rod from down under, and, it seems like it's moving enough to drive the fork.

I wonder why the clutch would misbehave all of the sudden. Hasn't been beaten. Car hasn't even been to the track since the disc and plate got replaced.
No noises coming from the TB.

Wonky...


Btw, thanks for the input, guys.


as far as the leaks, I don't think so. I've flushed the system with Power bleeder, and, dry, the system held 10psi, no problem...

I'm wondering if it's not the master...


The strange part is that the clutch let go very gradually. No "snap", no sudden stop. Just, slowly, went away. :(
"come back, little Sheba!"

(pissed off and unhappy makes for stupid Al)
alik is offline   Reply With Quote
Old 12-12-2011, 05:20 PM   #9
Newb
 
Join Date: Aug 2011
Posts: 12
Total Cats: 0
Default

Well if the slave is moving enough to drive the fork and the clutch is not working at all every time, you're wasting your time troubleshooting the hydraulics IMO. I would agree with the weirdness of it just going away vs just snapping like a typical broken spring carrier on the disc. Perhaps some fingers on the PP going bad?

On the bright side, at least you had fair warning
deeno is offline   Reply With Quote
Old 12-12-2011, 05:41 PM   #10
Elite Member
iTrader: (10)
 
soviet's Avatar
 
Join Date: Jan 2010
Location: VA
Posts: 3,519
Total Cats: 259
Default

Still, check the actual connections. There may no be puddles but the connections will be wet.

Basically, get under the car, check if the connections are dry. If they are wet, dry them up, press the clutch a few times and check again.
soviet is offline   Reply With Quote
Old 12-13-2011, 11:12 AM   #11
Junior Member
Thread Starter
iTrader: (3)
 
Join Date: Nov 2007
Location: Boston / '90 Mariner Blue
Posts: 310
Total Cats: 14
Default

Talked to ACT. Gonna rebuild the master & slave before pulling the tranny.
alik is offline   Reply With Quote
Old 12-19-2011, 05:29 PM   #12
Junior Member
Thread Starter
iTrader: (3)
 
Join Date: Nov 2007
Location: Boston / '90 Mariner Blue
Posts: 310
Total Cats: 14
Default

It was the ******* master
alik is offline   Reply With Quote
Old 12-19-2011, 05:57 PM   #13
Newb
 
Join Date: Aug 2011
Posts: 12
Total Cats: 0
Default

Sounds like ACT saved you a lot of time
deeno is offline   Reply With Quote
Old 12-19-2011, 09:24 PM   #14
Elite Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Granbury, TX
Posts: 6,010
Total Cats: 583
Default

Yep, hate to throw parts, but the hydraulics are so easy and cheap to do in comparison to dropping the tranny . . . .

Just had an ACT Stage 1 installed. Same issue, clutch would barely disengage, really hard to get into gear. Left the tranny shop Friday evening wondering "WTF"?

On Saturday AM, confirmed the slave was bad by pulling back the boot and finding fluid -- not much fluid, mind you. O'Reilly had a slave in stock. About a 2 hour job altogether (mainly because I'm slow), including adjusting the clutch pedal. Works beautifully now.

Happy!! I guess the point is that it doesn't take much of a leak to make your clutch feel like dog doo.
hornetball is offline   Reply With Quote
Old 12-19-2011, 09:26 PM   #15
Elite Member
iTrader: (3)
 
Join Date: Mar 2008
Location: Granbury, TX
Posts: 6,010
Total Cats: 583
Default

BTW, bought the clutch from Renown for $275 shipped. Heck of a deal.
hornetball is offline   Reply With Quote
Old 12-22-2011, 10:16 AM   #16
Junior Member
Thread Starter
iTrader: (3)
 
Join Date: Nov 2007
Location: Boston / '90 Mariner Blue
Posts: 310
Total Cats: 14
Default

Turns out, not quite a master's fault. Lol
Attached Thumbnails
Clutch issues-imag0300.jpg  
alik is offline   Reply With Quote
Old 12-22-2011, 10:22 AM   #17
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,892
Total Cats: 1,792
Default

wow. wtf.
Braineack is offline   Reply With Quote
Old 12-22-2011, 10:39 AM   #18
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Yeah, I've never seen that one before. How the hell does stamped steel crack like that?
hustler is offline   Reply With Quote
Old 12-22-2011, 11:00 AM   #19
Elite Member
iTrader: (5)
 
Join Date: Dec 2010
Location: Raleigh, NC
Posts: 1,970
Total Cats: 49
Default

yea, wtf exactly happened there? was there like improper install? or fork abuse? haha.
Seefo is offline   Reply With Quote
Old 12-22-2011, 03:42 PM   #20
Newb
 
Join Date: Apr 2010
Posts: 10
Total Cats: -3
Default

man i have had the worse experience with ACT clutches on my old acura...they are just not trust worthy likethey used to be
dc5_champ88 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 59 Yesterday 09:00 PM
ACT race clutch and AASCO 7lb. aluminum flywheel graexodus Miata parts for sale/trade 5 10-26-2015 02:48 PM
Odd Steering issue interestedofold Suspension, Brakes, Drivetrain 5 09-29-2015 02:42 PM
Are my coils failing? viriiguy General Miata Chat 5 09-28-2015 08:39 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 09:14 AM.