|
|
|
|
Thread Tools | Display Modes |
12-08-2003, 03:01 PM | #1 |
Scooby Newbie
Member#: 36162
Join Date: May 2003
Location: Burlington, VT
Vehicle:1997 97 Impreza L Co Black as night |
Flywheel resurfacing vs. not resurfacing
Has anyone had any problems after having a stock flywheel resurfaced?
I read a post (not on this site) about a problem after machining ... something about the clearance between the flywheel and clutch disk being too large, and the extra gap causing engagement/shudder problems. Any of you guys have input into this? Could machining the flywheel have any negative consequences? It is the stock flywheel w/ 90k miles on it. Also my 97L has a mechanical clutch linkage, so this might also be an issue (vs. hydraulic self-adjusting clutch).
* Registered users of the site do not see these ads.
|
12-09-2003, 09:03 PM | #2 |
Scooby Specialist
Member#: 18589
Join Date: May 2002
Chapter/Region:
SCIC
Location: Las Virgenes Cyn, CA
Vehicle:2002 WRX, Formerly it was blue |
Mind you I have WRX, so I have a hydraulic clutch actuator, with a pull type pressure plate. I had my flywheel re-surfaced for 2 reasons. One to eliminate the groves (like an old vinyl record) that are machined in new, and two to remove some of the surface scaring from the old clutch rivets.
I am not having any problems with the stock machined flywheel/clutch. The hydraulic is not a self-adjusting mechanism, it is just replacing a cable. The slave pushes on a fulcrum, which in turns pulls on the "through-out bearing" to dis-enage the clutch. I would say as long as you also replace the pressure plate with the clutch, there really should be no issue with machining the flywheel, and especially with a mechanical linkage, which is adjustable, unlike my WRX which is not adjustable. |
12-09-2003, 11:53 PM | #3 |
*** Banned ***
Member#: 16200
Join Date: Mar 2002
Vehicle:OK buy Nates beans westcoastroasting.com |
There was a thread about not using an STi flywheel with a non-STi pressure plate....
|
12-10-2003, 04:56 PM | #4 |
Scooby Guru
Member#: 4800
Join Date: Mar 2001
Chapter/Region:
TXIC
Location: Houston, Tx
Vehicle:1990 Legacy & OB XT AWD 6MT EJ22T AWIC Swap |
Don't resurface the flywheel. Like you read in that other site, it does adjust where the engage point is, and can cause premature wear/failure.
|
12-10-2003, 06:44 PM | #5 |
Scooby Guru
Member#: 6486
Join Date: May 2001
Chapter/Region:
MWSOC
Location: S.E. wisconsin
Vehicle:00 Impreza 2.5 RS Blue Ridge Pearl |
If done properly it should not alter anything. Is the wrx flywheel a single plane or dual plane? There is a limit as to how much you can machine it, too much and the clutch will not engage completely.
I usually just use a sanding block in a circular pattern to remove the hot spots and give the clutch a somewhat "new" face to engage with. |
12-11-2003, 06:51 AM | #6 | |
Cowabunga!
Super Moderator Member#: 185
Join Date: Aug 1999
Chapter/Region:
South East
Location: Orlando, Fl
Vehicle:2014 Impreza Sport Ice Silver Metalic |
Quote:
|
|
12-15-2003, 06:20 PM | #7 |
Scooby Specialist
Member#: 42964
Join Date: Sep 2003
Chapter/Region:
MAIC
Location: NoVA
Vehicle:08 STI, 03OBS, 99L |
Could anyone else provide some feedback here?
It seems that the current tally is split evenly between buy a new flywheel and resurface. Im very curious about this as when I was told I needed a new clutch by the dealer they said "well, if you shop around make sure the people that do the work put in a NEW flywheel because subarus are notorious for developing chatter if you resurface the flywheel." I of course translated this as "here at the dealer we desire to rip you off and we would love to put a new flywheel in for you because we charge lots for parts. We make lots more money this way than resurfacing" So, I'm curious of other's experiences. Also, if anyone knows if any of this is more important with a spring type clutch (what I have) that would be great. |
12-16-2003, 05:46 PM | #8 |
Scooby Newbie
Member#: 14305
Join Date: Jan 2002
Chapter/Region:
MAIC
Location: Pittsburgh
Vehicle:1997 Impreza OBS Blue |
I have a 97OBS with the mechanical clutch. I had an exedy lightweight flywheel with heavy hotspotting resurfaced and they place said they had to take off a lot to get it flat again (30 thousands of an inch) and that the change might be big enough to cause engagement problems.
There definately was an engagement point difference, but there was about twice as much adjustment in the linkage as I needed to compensate for it. |
12-17-2003, 11:19 AM | #9 |
Scooby Newbie
Member#: 17588
Join Date: Apr 2002
Location: Syracuse NY
Vehicle:2006 WRX SILVER |
Don't spend the money on getting it resurfaced just buy a exedy flywheel you won't be disipointed. The hole resurfacing thing seems to have alot of bad outcomes just spend the extra money and do it right the first time.
Kirk |
12-18-2003, 03:54 PM | #10 |
Scooby Newbie
Member#: 14305
Join Date: Jan 2002
Chapter/Region:
MAIC
Location: Pittsburgh
Vehicle:1997 Impreza OBS Blue |
Yeah, if it's an option *definately* get a lightweight flywheel. It's like suddenly the car feels and moves like it always should have. It's only harder to drive if you have a hard time driving to begin with, and you will enjoy every time you put your foot down.
|
01-02-2004, 09:52 AM | #11 |
Scooby Newbie
Member#: 36625
Join Date: May 2003
Location: Pacific Northwest
Vehicle:2006 Evolution 9 430 ft-lbs / 535 whp |
The '02-'04 WRX clutch is single plane. Remove the pressure plate alignment dowel pins, and it is easily resurfaced.
|
01-03-2004, 08:52 PM | #12 |
Former Vendor
Member#: 9327
Join Date: Aug 2001
Location: Z1Auto.com
|
There is no reason why it cannot be resurfaced, so long as there is enough meat left on it......the machinest can easily tell you this. Any issues that arise from resurfacing lie solely with the person who did it, not with the procedure itself.......
Adam |
08-20-2006, 08:25 PM | #13 |
*** Banned ***
Member#: 104143
Join Date: Jan 2006
Chapter/Region:
BAIC
Vehicle:05 WRX Silver |
.......
|
04-03-2021, 12:42 AM | #14 |
Scooby Newbie
Member#: 462848
Join Date: Feb 2017
|
This is quite old but,
im going to try turning my flywheel at home on my ranger rotor/flywheel lathe so ill let yall know how it goes
|
04-03-2021, 12:05 PM | #15 |
Scooby Specialist
Member#: 283429
Join Date: May 2011
Chapter/Region:
South East
Location: Down yonder.
Vehicle:2016 Fuji Sunfire 03 Silver |
Dang it - sucked in by someone resurrecting a 17 year old thread.Oh well...
Good luck - grinding rather than turning is the preferred method. I would think turning on a lathe would be very hard to control "ringing" (harmonic vibration) with a flywheel. Personally I have never been happy with the feel of a hydraulic controlled clutch after resurfacing the flywheel. Last edited by Elbert Bass; 04-03-2021 at 12:10 PM. Reason: back from the dead thread |
04-04-2021, 06:54 PM | #16 | |
Scooby Specialist
Member#: 459287
Join Date: Dec 2016
Chapter/Region:
VIC
Location: Vancouver BC Canada
Vehicle:1998 JDM Impreza STi V4 GF8 White |
Quote:
I'm surprised that the use of flywheel shims hasn't been mentioned. I also own a non-Subaru vehicle with a hydraulic clutch. There have been debates for years on other forums about the need to use a shim if the flywheel has been re-surfaced. For example, if .030" has been removed from the flywheel, then a .030" shim is used between the flywheel and crankshaft. I went this route when I changed the clutch in my non-Subaru, and the replacement clutch has been working just fine for the last eight years. Having said all that, I'll probably go the route of buying a lightweight (12-13 lbs?) flywheel when it comes time to replace the clutch in my STi. |
|
05-12-2021, 03:35 PM | #17 |
Scooby Newbie
Member#: 462848
Join Date: Feb 2017
|
Hello,
09-02 wrx ej205 here,(2nd JDM swap, I lost the first JDM EJ205 ACVS non-active, stranded in the desert with busted coolant hose, engine going in now is EJ205 Non-ACVS) I just took my flywheel off and resurfaced it at home myself (ranger brake lathe) correct mounting and centering comes down to personal technics, a "rubber band" specifically made for machining rotors goes on the outside covering all the teeth and absorbing vibrations, having been on a brake lathe for about 12 years you know vibrations are solved because you have a clean cut. I weighed in at 23.2 pounds (probably not the stock 02 flywheel, this wheel came off the original USDM EJ205 engine, I became the owner when it had a rod sticking out and didn't bother machining back then) I removed the center ring with E16 drive bolts and dowel pins. I also had to take a lot of material off to solve my hot spots, probably to much (once I smoked out the neighborhood with clutch slipping so not surprised) I weighed out...... 22.4 pounds (not a precision scale) DIY lightweight flywheel, I did measure how much came off but ill keep it to myself. I too, had a single surface flywheel and so any movement of "slack" comes forward on the input shaft/friction disc tooth contact area which according to rust vrs non-rust area had a generous amount to work with. Ill update later how it feels. |
05-12-2021, 07:36 PM | #18 | |
Scooby Specialist
Member#: 283429
Join Date: May 2011
Chapter/Region:
South East
Location: Down yonder.
Vehicle:2016 Fuji Sunfire 03 Silver |
Quote:
I have been turning wrenches pro for 43 years and never thought of or heard of shimming a flywheel. Dayum... Yet I have used shim stock to fit bearings back into Forester rears that spun the outer race in the knuckle... Last edited by Elbert Bass; 05-13-2021 at 08:02 AM. |
|
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
OEM wrx flywheel.....1,800 miles, resurfaced and new pilot bearing | impreza2 | Drivetrain | 8 | 03-26-2010 08:41 AM |
Portland area, where can i get my flywheel and pressure plate resurfaced? | ki11switch | North West Impreza Club Forum -- NWIC | 6 | 09-08-2008 04:24 PM |
FS: PA - OEM Flywheel from '04 STi - Resurfaced | V8killah91 | Drivetrain | 8 | 01-09-2008 08:56 PM |
Where to get flywheel & clutch balanced/resurfaced in Dallas? | BurtonCR | Texas Impreza Club Forum -- TXIC | 1 | 08-07-2007 03:12 PM |
Flywheels revisited - *can* we resurface? | mhaythor | Transmission (AT/MT) & Driveline | 9 | 01-16-2006 02:08 PM |