follow ft86club on our blog, twitter or facebook.
FT86CLUB
Ft86Club
Speed By Design
Register Garage Members List Calendar Search Today's Posts Mark Forums Read

Go Back   Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB > Technical Topics > Engine, Exhaust, Transmission

Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


User Tag List

Reply
 
Thread Tools Search this Thread
Old 01-26-2015, 11:15 PM   #1
Cal3000
Senior Member
 
Join Date: Dec 2012
Drives: Panda FR-S
Location: Corona, California
Posts: 531
Thanks: 297
Thanked 377 Times in 161 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Release Bearing or Pilot Bearing

When I release the clutch (push the pedal to the floor) from a dead stop, I hear a squeaking/grinding noise and my car wants to stall.
I've done a lot of forum searches around the web and there seems to be a lot of confusion about which bearing causes this noise in this situation.

Any input?
__________________
Vortech SC on 9psi Pulley, Invidia Catless Front Pipe, Invidia N1 Catback Exhaust
242whp/197ft-lb on Mustang Dyno (91 octane water)
284whp/223ft-lb on Mustang Dyno (E85)
Delicious Tuning
Cal3000 is offline   Reply With Quote
Old 01-26-2015, 11:49 PM   #2
steve99
Banned
 
Join Date: Dec 2013
Drives: FT86
Location: Australia
Posts: 8,000
Thanks: 1,035
Thanked 4,977 Times in 2,978 Posts
Mentioned: 598 Post(s)
Tagged: 2 Thread(s)
Quote:
Originally Posted by Cal3000 View Post
When I release the clutch (push the pedal to the floor) from a dead stop, I hear a squeaking/grinding noise and my car wants to stall.
I've done a lot of forum searches around the web and there seems to be a lot of confusion about which bearing causes this noise in this situation.

Any input?
we call it a throw-out bearing.
but if clutch not releasing when depressed it likely to be damaged clutch and\or pressure plate unless the bearing is completly ceased. While its apart you might as well replace the lot with an uprated unit if not done already.
steve99 is offline   Reply With Quote
Old 01-27-2015, 12:08 AM   #3
Ultramaroon
shrill
 
Ultramaroon's Avatar
 
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
Posts: 29,505
Thanks: 47,570
Thanked 32,751 Times in 17,194 Posts
Mentioned: 1058 Post(s)
Tagged: 9 Thread(s)
+1^^^ Don't try driving it. Have it trailered to the shop if you're not doing the clutch job yourself.
__________________
Ultramaroon is offline   Reply With Quote
The Following User Says Thank You to Ultramaroon For This Useful Post:
cdrazic93 (01-27-2015)
Old 01-27-2015, 12:56 AM   #4
cdrazic93
Junior
 
cdrazic93's Avatar
 
Join Date: Aug 2013
Drives: a car
Location: Probably at school
Posts: 4,342
Thanks: 3,184
Thanked 2,511 Times in 1,501 Posts
Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
+2^
__________________
"Ah! What music! They could have never imagined, those pioneers who invented the automobile, that it would posses us like this, our imaginations, our dreams. Men love women, but even more than that, men love CARS!"-Lord Hesketh
cdrazic93 is offline   Reply With Quote
Old 01-27-2015, 01:18 AM   #5
Cal3000
Senior Member
 
Join Date: Dec 2012
Drives: Panda FR-S
Location: Corona, California
Posts: 531
Thanks: 297
Thanked 377 Times in 161 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
I really have no choice as I don't have any other modes of transportation during the week. I just ordered a new clutch today and wont be getting it until Wednesday. From my research, it seems to be the pilot bearing which isn't as dangerous as a failing throw out bearing which can damage the transmission.

From what I see with my car, there is no noise after the car launches. Only at idle and launch. So the bearing doesn't seem to be in use when cursing. The release bearing(throw out) is constantly spinning when the clutch is engaged.
The Pilot bearing (seated in between the flywheel) connects to the input shaft. The main purpose is to guide the input shaft. So, when I start the car, input shaft has no rotation, pilot bearing begins spinning, then the pilot bearing is in use. When the clutch is engage, the pilot bearing is not in use, so no sound.
__________________
Vortech SC on 9psi Pulley, Invidia Catless Front Pipe, Invidia N1 Catback Exhaust
242whp/197ft-lb on Mustang Dyno (91 octane water)
284whp/223ft-lb on Mustang Dyno (E85)
Delicious Tuning
Cal3000 is offline   Reply With Quote
Old 01-27-2015, 03:04 AM   #6
steve99
Banned
 
Join Date: Dec 2013
Drives: FT86
Location: Australia
Posts: 8,000
Thanks: 1,035
Thanked 4,977 Times in 2,978 Posts
Mentioned: 598 Post(s)
Tagged: 2 Thread(s)
Quote:
Originally Posted by Cal3000 View Post
I really have no choice as I don't have any other modes of transportation during the week. I just ordered a new clutch today and wont be getting it until Wednesday. From my research, it seems to be the pilot bearing which isn't as dangerous as a failing throw out bearing which can damage the transmission.

From what I see with my car, there is no noise after the car launches. Only at idle and launch. So the bearing doesn't seem to be in use when cursing. The release bearing(throw out) is constantly spinning when the clutch is engaged.
The Pilot bearing (seated in between the flywheel) connects to the input shaft. The main purpose is to guide the input shaft. So, when I start the car, input shaft has no rotation, pilot bearing begins spinning, then the pilot bearing is in use. When the clutch is engage, the pilot bearing is not in use, so no sound.
Throw out bearing or thrust bearing is only in use when clutch pedal is depessed its the one that presses on pressure plate fingers to disengage clutch. when clutch pedal is released and your moving in gear it aint used.

see link below, unless we are getting our terminology all messed up due different countries

http://www.ehow.com/about_5456365_throwout-bearing.html

Last edited by steve99; 01-27-2015 at 05:51 AM.
steve99 is offline   Reply With Quote
Old 01-27-2015, 09:26 AM   #7
86to86
Member
 
Join Date: Dec 2012
Drives: FR-S Ultramarine
Location: Pacific NW
Posts: 16
Thanks: 5
Thanked 3 Times in 2 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
To test throwout/release bearing:


Drive steady speed somewhere quiet

Push pedal part way down, not far enough to release the clutch

Throwout bearing will spin, pilot bearing will not.


(Is that right? My poor old brain can't work very well this morning)
86to86 is offline   Reply With Quote
Old 01-27-2015, 01:55 PM   #8
Ultramaroon
shrill
 
Ultramaroon's Avatar
 
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
Posts: 29,505
Thanks: 47,570
Thanked 32,751 Times in 17,194 Posts
Mentioned: 1058 Post(s)
Tagged: 9 Thread(s)
Quote:
Originally Posted by 86to86 View Post
To test throwout/release bearing:


Drive steady speed somewhere quiet

Push pedal part way down, not far enough to release the clutch

Throwout bearing will spin, pilot bearing will not.


(Is that right? My poor old brain can't work very well this morning)
Pilot bearing spins so the crankshaft can rotate around the input shaft when the clutch is disengaged. Neither pilot nor throwout bearing spin when clutch is engaged.


OP, I strongly advise against driving it but if you insist, learn to shift without the clutch. Refrain from depressing it except to start from a dead stop. This will be your <ahem> crash course in rev matching. It won't last long.
__________________
Ultramaroon is offline   Reply With Quote
Old 01-27-2015, 04:38 PM   #9
86to86
Member
 
Join Date: Dec 2012
Drives: FR-S Ultramarine
Location: Pacific NW
Posts: 16
Thanks: 5
Thanked 3 Times in 2 Posts
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Ultramaroon View Post
Pilot bearing spins so the crankshaft can rotate around the input shaft when the clutch is disengaged. Neither pilot nor throwout bearing spin when clutch is engaged.
I was referring to that in-between condition where the stationary clutch fork contacts the throwout bearing, but clutch is still engaged and rotating. If the throwout bearing itself doesn't spin smoothly, it will make noise.

But you're right, this one sounds like it's gone too far and OP probably shouldn't be driving it.
86to86 is offline   Reply With Quote
Old 01-27-2015, 06:53 PM   #10
Ultramaroon
shrill
 
Ultramaroon's Avatar
 
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
Posts: 29,505
Thanks: 47,570
Thanked 32,751 Times in 17,194 Posts
Mentioned: 1058 Post(s)
Tagged: 9 Thread(s)
Quote:
Originally Posted by 86to86 View Post
I was referring to that in-between condition where the stationary clutch fork contacts the throwout bearing, but clutch is still engaged and rotating. If the throwout bearing itself doesn't spin smoothly, it will make noise.

But you're right, this one sounds like it's gone too far and OP probably shouldn't be driving it.
Oh, yeah! That makes perfect sense. Then if it starts to squeak or make noise when the clutch is disengaged - pilot bearing.

That's good stuff. Thanks.
__________________
Ultramaroon is offline   Reply With Quote
Old 01-27-2015, 09:05 PM   #11
Cal3000
Senior Member
 
Join Date: Dec 2012
Drives: Panda FR-S
Location: Corona, California
Posts: 531
Thanks: 297
Thanked 377 Times in 161 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by 86to86 View Post
I was referring to that in-between condition where the stationary clutch fork contacts the throwout bearing, but clutch is still engaged and rotating. If the throwout bearing itself doesn't spin smoothly, it will make noise.

But you're right, this one sounds like it's gone too far and OP probably shouldn't be driving it.
From that, I believe it isn't the throwout bearing. There is no noise at constant speeds during shift. There is noise however when I hold the clutch down too long. The input shaft begins to slow down and the pilot bearing begins to spin.

Release bearing always makes noise when the clutch is engaged if it is damaged.
Pilot bearing makes noise when the clutch is pressed.

[ame="https://www.youtube.com/watch?v=boPbjotHSE0"]Clutch release bearing/throwout bearing squealing noise - YouTube[/ame]

I fear the throwout bearing more as that can disintegrate and get caught up in the transmission and cause failure.
__________________
Vortech SC on 9psi Pulley, Invidia Catless Front Pipe, Invidia N1 Catback Exhaust
242whp/197ft-lb on Mustang Dyno (91 octane water)
284whp/223ft-lb on Mustang Dyno (E85)
Delicious Tuning
Cal3000 is offline   Reply With Quote
Old 01-27-2015, 10:39 PM   #12
Ultramaroon
shrill
 
Ultramaroon's Avatar
 
Join Date: Sep 2014
Drives: a 13 e8h frs
Location: vantucky, wa
Posts: 29,505
Thanks: 47,570
Thanked 32,751 Times in 17,194 Posts
Mentioned: 1058 Post(s)
Tagged: 9 Thread(s)
I've never experienced a pilot bearing failure so I'm especially curious in hearing of the outcome. Good luck with the repair.
__________________
Ultramaroon is offline   Reply With Quote
The Following User Says Thank You to Ultramaroon For This Useful Post:
Cal3000 (01-28-2015)
 
Reply

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Melted Throw Out Bearing danthedirt Issues | Warranty | Recalls / TSB 59 01-25-2018 05:32 PM
Throw-out bearing mhigham Issues | Warranty | Recalls / TSB 71 08-18-2016 10:21 AM
Wheel Bearing Woes jwstaton Issues | Warranty | Recalls / TSB 16 01-24-2014 08:06 PM
Thrust Bearing Going Out >(559)< FR-s Issues | Warranty | Recalls / TSB 22 06-19-2013 08:23 PM
bearing identification paraguin Other Vehicles & General Automotive Discussions 7 04-16-2013 10:18 AM


All times are GMT -4. The time now is 07:22 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, vBulletin Solutions Inc.
User Alert System provided by Advanced User Tagging v3.3.0 (Lite) - vBulletin Mods & Addons Copyright © 2022 DragonByte Technologies Ltd.

Garage vBulletin Plugins by Drive Thru Online, Inc.