3SGTE / 3SGE release bearings question.

The place for all technical car discussions. If you haven't already, read our Disclaimer first!

Moderator: The Mod Squad

3SGTE / 3SGE release bearings question.

Postby RomanV » Sun May 28, 2006 8:59 pm

Basically, my clutch is slipping horribly. (Or my diff is blown perhaps?)

my clutch etc. was all in great condition, I cleaned all of the parts with brakleen before installing, and everything seemed to go as planned.

However when I put the car in gear, even the smallest amount of load will make the clutch slip. (Unless it's the diff complaining)

I'm using the gearbox from a gen 5 NA SW20, and a cusco flywheel/clutch designed for the 3sgte.
I bought a new release bearing from Toyota, however I can't remember if I specified a release bearing for an NA or turbo.

What I'm thinking, is that my release bearing is too tall, and so it's depressing the clutch slightly. Enough to make it slip, and squeal horribly.
Since it's a 3 puck clutch, I would imagine that it really needs a high clamping pressure to work properly.

So what I'm wanting to know, is there a difference between NA and turbo release bearings?
My only other thoughts are that either the diff in the gearbox is blown (As it does this in every gear) or, my clutch is buggered. (Which I doubt is the case, everything seemed fine, and clean/in good condition)

I suppose that when I drop the motor out again (*sigh*) I can measure the distance of the face of the release bearing to the face of the bell housing, and the distance of the clutch forks/cover plate from the engine block, and see if there's a discrepancy.

Any help appreciated. 8)
User avatar
RomanV
Toyspeed Member
 
Posts: 4915
Joined: Wed Aug 13, 2003 12:17 am
Location: West Auckland

Postby sergei » Sun May 28, 2006 9:11 pm

Check if you can move fork freely, it should move ie when you compress the clutch slave cylinder with your finger, it should easily go in...
User avatar
sergei
Mad Russian
 
Posts: 8406
Joined: Wed May 15, 2002 12:06 pm
Location: North Shore

Postby *84vvt* » Sun May 28, 2006 9:17 pm

have you adjusted the cluch free play???


http://www.mr2-tech.com/bgb/mechanical/ ... clutch.htm
*84vvt*
Toyspeed Member
 
Posts: 20
Joined: Fri Nov 25, 2005 6:27 pm

Postby RomanV » Sun May 28, 2006 9:19 pm

I've taken off the slave cylinder, as I thought that perhaps it was... er... preloading the clutch fork so to speak.

But even with that off, there's no change.
User avatar
RomanV
Toyspeed Member
 
Posts: 4915
Joined: Wed Aug 13, 2003 12:17 am
Location: West Auckland

Postby RomanV » Sun May 28, 2006 9:21 pm

Are you sure that I should be able to press in the clutch fork, just with my finger? I would think that with a high clamping pressure cover plate, it would take a considerable amount of force to depress the clutch.
In other words, no I cant move the fork with my finger. Unless you mean in the other direction, eg. moving the release bearing further away from the clutch cover plate.

I suppose that might be a good way to check actually, the fork will be under a lot of tension if the release bearing is hard up against the cover plate.

IIRC, the fork seemed pretty well solidly in one place, no free movement either way.
User avatar
RomanV
Toyspeed Member
 
Posts: 4915
Joined: Wed Aug 13, 2003 12:17 am
Location: West Auckland

Postby fivebob » Sun May 28, 2006 10:16 pm

Which Cusco clutch/flyweel setup? Some of them come with their own special release bearing, which IIRC is thinner than the stock item.
User avatar
fivebob
Toyspeed Member
 
Posts: 3879
Joined: Fri May 02, 2003 5:12 pm
Location: Tauranga

Postby RomanV » Sun May 28, 2006 10:23 pm

Hmm that's interesting to know, it sounds like that might be what I need.

I was told that the release bearing was just the standard toyota part, but it seems as though this isnt the case.
User avatar
RomanV
Toyspeed Member
 
Posts: 4915
Joined: Wed Aug 13, 2003 12:17 am
Location: West Auckland

Postby sergei » Sun May 28, 2006 10:25 pm

yep, I ment other way (moving release bearing away from pressure plate), to see if it is preloaded...
User avatar
sergei
Mad Russian
 
Posts: 8406
Joined: Wed May 15, 2002 12:06 pm
Location: North Shore

Postby Lloyd » Sun May 28, 2006 10:28 pm

He was meaning pushing the fork to move the bearing away from the pressure plate, ie the clutch going off more. Basically the pressure from the clutch plate trying to apply itself should be enough to push the bearing away, and therefore push on the clutch fork to force the slave cylinder to go back into itself (if you get what I mean). If you cant push the piston back into the cylinder with clutch pedal off, then the clutch is going to be partially slipping

Hopefully you can see what I'm getting at



EDIT- Or I could have just said that....
User avatar
Lloyd
** Moderator **
 
Posts: 6195
Joined: Tue Oct 15, 2002 1:50 pm
Location: Dunedin

Postby RomanV » Sun May 28, 2006 10:29 pm

Yep, that makes sense.

Also, anyone know where I could get a release bearing to suit?

I suppose I'll have to find out what exactly I've got first.
User avatar
RomanV
Toyspeed Member
 
Posts: 4915
Joined: Wed Aug 13, 2003 12:17 am
Location: West Auckland

Postby RomanV » Mon May 29, 2006 2:23 am

fivebob wrote:Which Cusco clutch/flyweel setup? Some of them come with their own special release bearing, which IIRC is thinner than the stock item.


Okay. From what I can gather from the cusco site, I have the "SUPER LIGHT CHROME MOLYBDENUM FLY WHEEL"
http://www.cusco.co.jp/english/e_media3/e_fly.gif


"METAL REINFORCED CLUTCH DISC"
http://www.cusco.co.jp/english/e_media3/e_metal.gif


and the "REINFORCED CLUTCH COVER"
http://www.cusco.co.jp/english/e_media3/e_reinfo.gif

However there doesnt seem to be much more information than that on their website.
User avatar
RomanV
Toyspeed Member
 
Posts: 4915
Joined: Wed Aug 13, 2003 12:17 am
Location: West Auckland

Postby fivebob » Mon May 29, 2006 12:56 pm

RomanV wrote:
fivebob wrote:Which Cusco clutch/flyweel setup? Some of them come with their own special release bearing, which IIRC is thinner than the stock item.


Okay. From what I can gather from the cusco site, I have the "SUPER LIGHT CHROME MOLYBDENUM FLY WHEEL"
http://www.cusco.co.jp/english/e_media3/e_fly.gif


"METAL REINFORCED CLUTCH DISC"
http://www.cusco.co.jp/english/e_media3/e_metal.gif


and the "REINFORCED CLUTCH COVER"
http://www.cusco.co.jp/english/e_media3/e_reinfo.gif

However there doesnt seem to be much more information than that on their website.

It's only the Super Single & Twin Plate clutch systems that come with the release bearing.

If they were sold as separate items, and they don't list a release bearing, then I would assume they're compatible with stock items. So maybe the NA gearbox/bellhousing is not compatible with the turbo clutch, or you have the wrong release bearing :?

You need to measure free play of the clutch fork, and possibly check the installed height of the forks on the diaphragm spring to see if there's is any difference between NA and Turbos.
User avatar
fivebob
Toyspeed Member
 
Posts: 3879
Joined: Fri May 02, 2003 5:12 pm
Location: Tauranga

Postby sergei » Mon May 29, 2006 1:15 pm

But if he can compress the slave cylinder (by pressing the fork towards the engine) it means that the bearing is not the problem...
User avatar
sergei
Mad Russian
 
Posts: 8406
Joined: Wed May 15, 2002 12:06 pm
Location: North Shore

Postby RomanV » Mon May 29, 2006 2:24 pm

Yes but I havent had time to check that sergei, and from memory, I am fairly sure that the fork was rigidly in place.

(Which would suggest the release bearing and/or fork being the problem)
Or maybe the dimensions of the bellhousing. :cry:
User avatar
RomanV
Toyspeed Member
 
Posts: 4915
Joined: Wed Aug 13, 2003 12:17 am
Location: West Auckland


Return to Tech Questions

Who is online

Users browsing this forum: Google [Bot] and 14 guests