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Old 09-10-2004, 02:18 PM   #1
stephan
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Default How important is it to resurface the flywheel?

I need to install my new clutch tomorrow, what will happen if I skip the resurfacing of the flywheel? If the flywheel looks true and not damaged, will it make a big difference?
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Last edited by stephan; 09-10-2004 at 03:45 PM.
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Old 09-10-2004, 04:49 PM   #2
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anyone?
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Old 09-10-2004, 05:20 PM   #3
Mulder
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You could end up taking it apart again and doing the job twice. At the very least the flywheel should be checked with a gauge since you can't tell by looking if it's true, as the measurements are in the thousandths of an inch. If it's not in spec for flatness according to the limits in the manual it should be resurfaced. It should also be resurfaced if it's glazed.
Any signs of heavy scoring, discoloration or cracking would indicate the need for a new flywheel.
If you just assume it's ok without checking it properly you could have shudder on your new clutch or it could wear prematurely.
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Old 09-10-2004, 06:31 PM   #4
Pacobeagle
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You risk clutch shudder to a degree. I mean, to resurface a flywheel is $30 or so. Why skimp out on this step since you are already there? Unless of course that you are replacing the flywheel.
Plus, it ensures that the new disc mates perfectly and lessens the chance of slippage.

I agree with Mulder.


jose
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Old 09-11-2004, 10:36 AM   #5
stephan
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Well the thing is, I will be installing my clutch today, and I dont think any machine shops are open Saturdays. I need my car by Monday, so its not that I am skimping, I just won't be able to have it done.
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Old 09-11-2004, 11:01 AM   #6
Mulder
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Unless your car is undriveable with the existing clutch you may want to wait until you can arrange for the proper machine services. You may get away without it but you could also be very sorry, and there is no way to tell beforehand.
You could also (assuming time is not a problem) look for a good used flywheel from someone who has replaced theirs with a lightened one, and have that one machined so you can have it on hand ready to go when you do the install.
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Old 09-11-2004, 11:17 AM   #7
stephan
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Unfortunately I need to install my clutch today, its the only time I will have to do it, and the clutch is on its last leg.
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Old 09-11-2004, 11:27 AM   #8
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Bad planning on my part.
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Old 09-11-2004, 12:49 PM   #9
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Well, good luck then. Pay close attention to the condition of the flywheel and realize that if it's bad you'll be taking it apart again. About the only thing you can do with it on the car is to sand the surface to remove any light glazing.
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Old 09-11-2004, 02:23 PM   #10
stephan
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Thanks, I figured if the surface of the flywheel looked bad, I would have to wait until Monday to either have it resurfaced or have an aftermarket flywheel overnighted.
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Old 09-12-2004, 08:50 PM   #11
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Let us know what happens!
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Old 09-16-2004, 12:05 AM   #12
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I have gone through several clutches on a 1.8l VW due to harsh driving conditions. I rarely replaced/resurfaced the fly. If you just hit it with a bit of sandpaper until the whole thing is shiny you should be OK. This will take off any glazing, but won't do anything if its warped. Due to their design, clutches usually wear fairly even. I wouldn't sweat it.
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Old 09-16-2004, 07:40 PM   #13
stephan
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OK so I got the clutch install done, total PITA. The flywheel looked pretty good, compared to damgaged flywheels I have seen in the past. Upon close inspection I did notice microscopic surface cracks, but I dont think this will be a problem(famous last words). I still have a bit of clutch chatter, pretty much the same as stock, so I am used to it. The stage 2 clutch grabs alot faster and feels pretty good overall. Alot sportier than stock, but not crazy.
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