Destroyed two throwout bearings in 100 miles, what gives? Supermiata clutch - Miata Turbo Forum -Boost cars, acquire cats.

Welcome to   Members

General Miata Chat A place to talk about anything Miata

LinkBack Thread Tools
Old 07-02-2016, 12:02 AM   #1
Senior Member
Thread Starter
iTrader: (6)
Join Date: Sep 2007
Posts: 1,029
Total Cats: 24
Default Destroyed two throwout bearings in 100 miles, what gives? Supermiata clutch

I'll try and give the cliffs notes of my situation

-Had a FM turbo B6 in my 1990. Threw a Supermiata organic 1.6 clutch in it with stock flywheel. Drove it for ~10,000 miles. No issues.
-Swapped B6 with BP6D & 6speed. Moved stock 1.6 flywheel and Supermiata clutch into new setup. Beat on it for 1500 miles with no issue
-On road trip to Glacier National Park, about 1000 miles into the trip, the gears become hard to engage. Clutch pedal becomes "gritty" and there is quite a bit of vibration transmitted during clutch-in. Attempting to shift into gear with the engine on makes the car move (while not entirely being in gear) We replace the master and slave & bleed. Issue persists.
-Limp car to dealership in one gear, they find the throwout bearing is lunched and swap it out.
-Car drives fine for 100 miles before the symptoms come back. Dealership finds another destroyed throwout bearing.
-Replace entire setup with Exedy 61-0122. Drive car 900 miles today with no issues. Clutch feels perfect. No adjustment was done aside from the clutch install.

I took a look at the parts that were pulled out and nothing is visibly wrong with the Supermiata clutch parts save that some of the springs appear to be loose. The only other observation I have regarding what happened is that there is quite a bit less rattle on decel after the Exedy was put in.

albumleaf is offline   Reply With Quote
Old 07-02-2016, 12:11 AM   #2
Sadfab Union President
iTrader: (2)
Join Date: May 2014
Location: Kansas
Posts: 2,541
Total Cats: 105

Is your clutch pedal adjusted so that it completely releases pressure from the TOB between shifts?
deezums is offline   Reply With Quote
Old 07-02-2016, 09:19 AM   #3
Elite Member
iTrader: (19)
Join Date: Jun 2007
Location: Rochester, NY
Posts: 5,136
Total Cats: 294

Just going to post the same thing. If the TO isn't released from the clutch after the pedal is let off, it's spinning the whole time. It's just not made for that.
rleete is online now   Reply With Quote
Old 07-02-2016, 02:02 PM   #4
Junior Member
iTrader: (2)
Join Date: Mar 2008
Location: Navarre, Fl
Posts: 187
Total Cats: 2

you could try and get the upgraded one from flyinmiata. It's a monster. I had upgraded to their stage 2 clutch and it also destroyed the standard TO bearing. This was 7 years ago and no issues since.
ericsbestshot is offline   Reply With Quote
Old 07-02-2016, 02:17 PM   #5
Mr Broke Pants
iTrader: (3)
thumpetto007's Avatar
Join Date: Sep 2010
Posts: 1,040
Total Cats: 61

^just make extra sure the HD release bearing from Flyin Miata isn't faulty. Mine was, but thankfully didn't grind all the way through the pressure plate, and Flyin Miata sent me replacements at no cost.

The release or throw out bearing should spin with a small amount of resistance, not free spinning, but it shouldn't be too difficult to spin.
thumpetto007 is offline   Reply With Quote
Old 07-02-2016, 05:16 PM   #6
SadFab Sales Lady
iTrader: (5)
aidandj's Avatar
Join Date: Apr 2014
Location: Beaverton, USA
Posts: 14,236
Total Cats: 886

+1 to clutch adjustment. Every clutch is different and might need different adjustment.
aidandj is offline   Reply With Quote

Related Topics
Thread Thread Starter Forum Replies Last Post
SPS Motorsport Turbo Kit - 1.6 NB Oridori Prefabbed Turbo Kits 26 08-30-2016 08:01 AM
iOS 1.6 cast t25 turbo manifold fkncaleb WTB 2 08-04-2016 06:12 PM
Supermiata S1 - New turbo class for 2017 emilio700 Race Prep 12 07-21-2016 12:46 PM
Not firining - trying to use 36-1 Protégé wheel work on 92 1.6 Turbo Exocet / Miata Rauf MSPNP 8 06-09-2016 12:11 AM
1.6 miata turbo setup Swanpuppy Miata parts for sale/trade 0 04-25-2016 09:34 AM

Thread Tools

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 On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 02:40 PM.