AHHH My Throw Out Bearing EXPLODED!!! - 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 12-09-2010, 08:13 PM   #1
Junior Member
Thread Starter
iTrader: (2)
 
Join Date: Nov 2010
Location: West Islip, NY
Posts: 58
Total Cats: 0
Default AHHH My Throw Out Bearing EXPLODED!!!

Story time kiddies....
I've got a 1990 1.6L Miata(no ****) with a fidanza flywheel and ACT HD clutch kit (6 puck sprung) I used the supplied TO bearing and right away I had a little tapping noise that I know is not normal but usual of some aftermarket clutch kits. My slave cyl. blew out on me about 2000 miles later so I replaced it with one from Moss Motors. Not knowing that there was a VIN split for this part mid 90's (as their website only shows a slave for a 1990 or 1991 car) I bought and installed the one meant for a 1990. A short time after that I was getting an intermittent spongy pedal and the shifter was a lil hard to get into gear. I was able to pump up the pedal and it would be fine for a while then one night the pedal dropped and I had to force the shifter into 2nd just to get the thing home! I figured the master must have been leaking internally soooo I changed that too. Now I got a new master and slave but can't get a good pedal, and when I do I lose it as soon as I start the car. Somehow I found that I had the wrong slave cyl. (the throw is a little longer on the slaves after the VIN split) I changed it AGAIN! still i get the same thing, no pedal! I can hear a weird clicking noise in the tranny when my buddy let off the pedal, so i figure theres something wrong inside. I pulled the engine and tranny last sunday and separated them today and this is what I found!!
Name:  scan00032.jpg
Views: 105
Size:  40.4 KB

the effing TO bearing was in four pieces!!! The one part was still clipped on the fork and the rest were just laying in the bell housing... Now my question is has anyone had or heard of this happening? and what do you thing the possible causes are, other than maybe the TO bearing was just no good?
Im going to order a Mazda one tomorrow, but if there is a real reason for this I would definitely like to fix it

Thanks Much!
Slydways91 is offline   Reply With Quote
Old 12-09-2010, 08:30 PM   #2
Junior Member
iTrader: (2)
 
Join Date: Sep 2009
Location: Chicago, IL
Posts: 250
Total Cats: 0
Default

Impressive.
saedrin is offline   Reply With Quote
Old 12-09-2010, 08:30 PM   #3
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Delicious and Moist.
Posts: 26,327
Total Cats: 1,926
Default

That's pretty bad-***. It looks like the pieces are still moving very fast even though they're standing still.

(Clever use of a scanner, actually. I'd never thought of scanning a three-dimensional object before.)

Quote:
Now my question is has anyone had or heard of this happening?
Yes. Once.
Joe Perez is offline   Reply With Quote
Old 12-09-2010, 08:35 PM   #4
Junior Member
iTrader: (5)
 
Join Date: May 2009
Location: Gay Area, CA
Posts: 220
Total Cats: 6
Default

Your failure sounds similar to the first batch of Flyin' Miata Stg II kits. They were dying quickly from too much TO bearing to pressure plate clearance. 5mm larger TO bearing fixed it.

I'd contact Flyin' Miata and ask if their beefier Stg II TO bearing would clear your ACT pressure plate, my FMII has held up for about 5K now. The ACT & FM kits look very similar.

Last edited by Import Al; 12-09-2010 at 08:47 PM. Reason: dumbz
Import Al is offline   Reply With Quote
Old 12-09-2010, 08:40 PM   #5
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,109
Total Cats: 518
Default

Yup that's happened to me. Caused me to pull the entire enough though, as the shrapnel shredded the rear main seal, and I have no idea how anyone replaces one of those properly without flipping the engine over and removing the oil pan. I think that's when I drilled and tapped my pan for an oil drain actually...

I did two things wrong on that clutch change. I used an ebay throw out bearing, and I didn't have the flywheel resurfaced. I used an old SPEC throwout bearing and resurfaced the flywheel with my most recent ebay clutch swap, and it's been going great for over 2000 miles now.
curly is offline   Reply With Quote
Old 12-09-2010, 09:07 PM   #6
Boost Pope
iTrader: (8)
 
Joe Perez's Avatar
 
Join Date: Sep 2005
Location: Delicious and Moist.
Posts: 26,327
Total Cats: 1,926
Default

Quote:
Originally Posted by curly View Post
(...)the rear main seal, and I have no idea how anyone replaces one of those properly without flipping the engine over and removing the oil pan.
With a very stout dental pick and a set of drift pins.

It's a pain in the ***, but it's doable.
Joe Perez is offline   Reply With Quote
Old 12-09-2010, 09:17 PM   #7
AFM Crusader
iTrader: (18)
 
olderguy's Avatar
 
Join Date: Oct 2004
Location: Wayne, NJ
Posts: 4,438
Total Cats: 84
Default

Happened on a friends car where the TO bearing was not fully released, spun constantly under pressure, overheated and exploded. Slave was not releasing completely. Freed up slave and put in OEM TO bearing.
olderguy is offline   Reply With Quote
Old 12-09-2010, 11:08 PM   #8
Junior Member
Thread Starter
iTrader: (2)
 
Join Date: Nov 2010
Location: West Islip, NY
Posts: 58
Total Cats: 0
Default

thanks much guys! i'll contact Flyin Miata and see what they say. I guess between having the wrong slave cylinder and the excessive clearance could have done it. What about the beating the hell out of it factor, could many 7k clutch dumps, and powershifting do this? And yes thats my scanner, i'm still in the dark ages without a digital camera... I took all the pics of my car with disposable cameras from cvs or target! thanks much, i'll let you know how it goes.
Slydways91 is offline   Reply With Quote
Old 12-10-2010, 03:20 AM   #9
Junior Member
iTrader: (5)
 
Join Date: Jan 2009
Location: frederick MD
Posts: 348
Total Cats: -6
Default

yup this just happened to me, just the way you described it
nickblackbelt is offline   Reply With Quote
Old 12-14-2010, 03:08 PM   #10
Elite Member
iTrader: (8)
 
Join Date: Sep 2006
Location: Severn, MD
Posts: 1,927
Total Cats: 5
Default

Happened to me way back when on my 1.6.
fmowry is offline   Reply With Quote
Old 12-16-2010, 06:26 PM   #11
Junior Member
Thread Starter
iTrader: (2)
 
Join Date: Nov 2010
Location: West Islip, NY
Posts: 58
Total Cats: 0
Default

allright guys, i've talked to a local shop that specializes in clutches, he told me that between my hydraulic issues and excessive clearance (which i should've adjusted at the pedal) and shitty chinese brand quailty is what killed it. The guy also didn't like my clutch disc-pressure plate combo. he said that typically for a clutch this size he wouldn't use a 6 puck b/c it requires a higher clamping load thus more stress on the TO bearing. he suggested i get a 4 puck sprung disc Mazda TO bearing, and he might be able to re-work my PP so it will require less force to operate it. I will let you all know how it goes..
Slydways91 is offline   Reply With Quote
Old 12-19-2010, 04:28 AM   #12
Junior Member
iTrader: (2)
 
Join Date: Sep 2009
Location: Chicago, IL
Posts: 250
Total Cats: 0
Default

Quote:
Originally Posted by Slydways91 View Post
re-work my PP so it will require less force to operate it.
Wait, what?
saedrin is offline   Reply With Quote
Old 12-19-2010, 04:42 AM   #13
Cpt. Slow
iTrader: (25)
 
curly's Avatar
 
Join Date: Oct 2005
Location: Oregon City, OR
Posts: 12,109
Total Cats: 518
Default

Yeah sure, just angle grind out a few of the teeth. Easy peasy. Safe to boot too.
curly is offline   Reply With Quote
Old 12-19-2010, 05:12 PM   #14
Junior Member
Thread Starter
iTrader: (2)
 
Join Date: Nov 2010
Location: West Islip, NY
Posts: 58
Total Cats: 0
Default

yeah i don't know wtf he would do to it but he apparently modifies and rebuilds clutches and pressure plates. He told me that he typically sells Exedy clutch kits but has done a lot of work with ACT setups. so im bringing him my stuff to check out this week and i'll let you know... also when i took the PP off the flywheel i found both the flywheel and PP surfaces are worn in pretty nicely (only have about 5000-6000 miles on the whole setup....
Slydways91 is offline   Reply With Quote
Old 01-26-2011, 09:16 PM   #15
Junior Member
iTrader: (5)
 
Join Date: Jan 2009
Location: frederick MD
Posts: 348
Total Cats: -6
Default

and i just droped 1k cash for labor on a stock clutch out here lol when i do all the other damn work myself....oh well...being lazy
nickblackbelt is offline   Reply With Quote
Old 01-26-2011, 09:25 PM   #16
Elite Member
iTrader: (41)
 
Join Date: Jan 2006
Location: Seabrook, TX
Posts: 2,409
Total Cats: 19
Default

Quote:
Originally Posted by nickblackbelt View Post
and i just droped 1k cash for labor on a stock clutch out here lol when i do all the other damn work myself....oh well...being lazy
Holy ****. I knew things were expensive there but I'm pretty sure you got hosed. A typical shop around me would do it for $600 with OEM replacement clutch kit. All mazda provides is an exedy kit as their oem replacement.
rharris19 is offline   Reply With Quote
Old 01-26-2011, 09:31 PM   #17
Junior Member
iTrader: (5)
 
Join Date: Jan 2009
Location: frederick MD
Posts: 348
Total Cats: -6
Default

i even brought my own clutch kit i had for 300 bucks
nickblackbelt is offline   Reply With Quote
Old 01-26-2011, 11:19 PM   #18
Elite Member
iTrader: (7)
 
Join Date: Jul 2009
Location: Gainesville,Fl
Posts: 3,354
Total Cats: 7
Default

This thread reminds me to get TO Bearing from work.




Quote:
Originally Posted by nickblackbelt View Post
i even brought my own clutch kit i had for 300 bucks
Damn! You coulda had a twin disc.
Attached Thumbnails
AHHH My Throw Out Bearing EXPLODED!!!-untitledppp.png  
turotufas is offline   Reply With Quote
Old 01-26-2011, 11:31 PM   #19
Supporting Vendor
iTrader: (31)
 
Savington's Avatar
 
Join Date: Nov 2006
Location: Sunnyvale, CA
Posts: 14,370
Total Cats: 1,332
Default

Quote:
Originally Posted by nickblackbelt View Post
and i just droped 1k cash for labor on a stock clutch out here lol when i do all the other damn work myself....oh well...being lazy
Holy ****, dude. Did the shop at least kiss you while they were doing the job?

It's 4 book hours, we charge $300 labor.
Savington is offline   Reply With Quote
Old 01-29-2011, 06:02 AM   #20
Junior Member
iTrader: (1)
 
Join Date: Nov 2010
Posts: 55
Total Cats: 0
Default

wow
rotary84 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 12-15-2017 09:00 PM
elesjuan's mediocre 95 Miata adventure (google fiber edition) elesjuan Build Threads 8 02-16-2016 09:36 PM
Another Alternator thread ihiryu General Miata Chat 9 09-28-2015 11:22 AM
91 Celica manual trans, is this fucked? Onyxyth Insert BS here 1 09-19-2015 08:27 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 10:17 AM.