Welcome to the North American Subaru Impreza Owners Club Thursday March 28, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Transmission (AT/MT) & Driveline

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 02-09-2007, 10:26 AM   #1
SBW
Scooby Specialist
 
Member#: 38469
Join Date: Jun 2003
Chapter/Region: NESIC
Vehicle:
07 LGT spec-b
Crystal Grey Metallic

Default clutch pressure plate & uneven wear

I straightedged, my low-milage pressure plate friction surface, and it was uneven- I would have to say its concaved in, and looks like its got more wear on the inner diameter than on the outer diameter of the friction surface.

______
\ /

basically looking like the above, except the above is exaggerated. What I dont understand is this, I installed a new clutch but didnt get my flywheel surfaced, so when I pulled the clutch disc, it was worn on the outer edges, so basically the friction disc has worn down unevenly as well. Does this make sense?

IBalwaysreplacebothdiscandpressureplate
* Registered users of the site do not see these ads.
SBW is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 02-09-2007, 01:27 PM   #2
electricpork
Scooby Specialist
 
Member#: 9498
Join Date: Aug 2001
Chapter/Region: MWSOC
Location: Detroit
Vehicle:
03 Bugeye
Junkyards are fun!

Default

always replace both the disc and pressure plate.



So what you're saying is that you're confused as to why the inner edge of the pressure plate is worn, but the outer edge of the friction disc is worn?

You said it was low mileage....if you could still see the machining marks in it when you replaced it it might have been new enough to warrant not resurfacing (though that's never really recommended). If not, I can only imagine that that you experienced quite a bit of clutch chatter. Are you running the small center-diameter OEM 02 organic clutch? ...with your 12 second EJ22T?
electricpork is offline   Reply With Quote
Old 02-09-2007, 01:42 PM   #3
SBW
Scooby Specialist
 
Member#: 38469
Join Date: Jun 2003
Chapter/Region: NESIC
Vehicle:
07 LGT spec-b
Crystal Grey Metallic

Default

no it was an exedy stage 1 organic clutch. And although I know one should always replace both, the last time I was doing the swap I got the transmission geared differently as well, and during the process I should've had my flywheel surfaced but didnt.(forgot among the other things I was doing)

so the uneven wear was quite visible on the clutch disc, but I figured a low mileage pressure plate might be ok to re-use, but that just isn't the case. Straightedging the friction plate on the P.P. showed a concave type of wear on it. So I was just trying to make sure that it should be perfectly flat, and I wasn't losing it.
SBW is offline   Reply With Quote
Old 02-09-2007, 10:38 PM   #4
ACTman
Scooby Newbie
 
Member#: 113222
Join Date: Apr 2006
Default

What you are seeing is not wear. The pressure plate and flywheel always become concave when overheated because the heat warps the surfaces in this manner. You can have a 200K mile pressure plate and it may be totally flat or you can warp it just like yours in a manner of a couple launches if you slip it enough.
ACTman is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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
FS (PA) 6 speed flywheel, clutch disc, pressure plate & throwout bearing (STi/spec.b) weaselchew Drivetrain 11 01-22-2010 12:19 AM
Wrong Pressure Plate & Clutch? bmw50021 Transmission (AT/MT) & Driveline 3 01-19-2010 05:27 PM
Exedy OEM WRX Pressure Plate & Clutch alex02wrx Drivetrain 7 09-29-2008 01:56 PM
STOCK WRX Clutch, Pressure plate, & Flywheel IBleedRallyBlue Drivetrain 13 01-04-2008 12:06 AM
NYC: 02 WRX Pressure Plate & Clutch Fork Gordata Drivetrain 0 08-07-2006 12:21 PM

All times are GMT -4. The time now is 01:11 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.