Flywheel resurfacing
you ask a lot of questions, grasshopper.
direct reason for the clutch coming up? it's self adjusting clutch, as it wears out, the engagement point comes up.
you should just let it happen. It lets you know when to change the clutch.
mine's still all the way to the floor. I have it just barely enough that the self adjusting wear works through the fluid pops it up... (or something I forgot all about how the clutch works again.)
Let's take a lesson together, kilterman.
http://*********************/forums/showthread.php?t=157
here we go.
make sure you read dirks comment on the bottom.
direct reason for the clutch coming up? it's self adjusting clutch, as it wears out, the engagement point comes up.
you should just let it happen. It lets you know when to change the clutch.
mine's still all the way to the floor. I have it just barely enough that the self adjusting wear works through the fluid pops it up... (or something I forgot all about how the clutch works again.)
Let's take a lesson together, kilterman.
http://*********************/forums/showthread.php?t=157
here we go.
make sure you read dirks comment on the bottom.
Originally Posted by KILTERMAN
What is the direct reason for this? I assume this is a bad thing. Is this something that can be adjusted? I noticed the same on mine aswell .
Ditto! You other guys are trying to think too hard or you are superstitious.
FYI: Any hot spots on the flywheel are usually hard, far deeper than what you can resurface out. The clutch doesnt care hard from soft really, only high and low to there are no problems with hard spots until they become high or low spots. On grey iron castings you have to watch it, but since the stock EVO flywheel is not grey iron, you are pretty safe that it won't blow up like the typical flywheel can when it gets cracked. I have seen some pretty ugly flywheels that are no problem to resurface so don't be alarmed by how it looks. Put a straight edge on the clutch surface and check how warped it is. If it is less than .020", then you are pretty safe on the EVO. If it's cracked, throw it away. If it is smooth with no high spots and it is warped less than .005", I doubt if you would notice any difference if you did resurface it.
The few thousanths of material you are going to take off if you resurface a flywheel isn't going to have a significant impact on operation (unless the machine shop screws up). You would have far more impact on warpage from an extra 1/2 second of slipping than you would by resurfacing the flywheel. The driver is the single biggest variable in how hot the clutch and flywheel is going to get. So if you really want to prevent warpage, don't worry about the flywheel and watch how you drive instead.
And this is coming from someone who manufactures and sells flywheels. We make a lot more money selling flywheels than telling people to resurface theirs or to drive carefully so not to burn one up. I have seen some pretty bad resurface jobs though, so beware. Someone mentioned RRE... they are pretty picky and I have seen their work, so I would trust them for sure. We also do it and we include dynamic balancing, but we don't really advertise the service. We would rather build new clutches than do rebuiliding, but we have the right equipment.
FYI: Any hot spots on the flywheel are usually hard, far deeper than what you can resurface out. The clutch doesnt care hard from soft really, only high and low to there are no problems with hard spots until they become high or low spots. On grey iron castings you have to watch it, but since the stock EVO flywheel is not grey iron, you are pretty safe that it won't blow up like the typical flywheel can when it gets cracked. I have seen some pretty ugly flywheels that are no problem to resurface so don't be alarmed by how it looks. Put a straight edge on the clutch surface and check how warped it is. If it is less than .020", then you are pretty safe on the EVO. If it's cracked, throw it away. If it is smooth with no high spots and it is warped less than .005", I doubt if you would notice any difference if you did resurface it.
The few thousanths of material you are going to take off if you resurface a flywheel isn't going to have a significant impact on operation (unless the machine shop screws up). You would have far more impact on warpage from an extra 1/2 second of slipping than you would by resurfacing the flywheel. The driver is the single biggest variable in how hot the clutch and flywheel is going to get. So if you really want to prevent warpage, don't worry about the flywheel and watch how you drive instead.
And this is coming from someone who manufactures and sells flywheels. We make a lot more money selling flywheels than telling people to resurface theirs or to drive carefully so not to burn one up. I have seen some pretty bad resurface jobs though, so beware. Someone mentioned RRE... they are pretty picky and I have seen their work, so I would trust them for sure. We also do it and we include dynamic balancing, but we don't really advertise the service. We would rather build new clutches than do rebuiliding, but we have the right equipment.
i have the hdss kit i was wondering if you can resurface the flywheel and if yes then whats the specs on it thanks.
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Joined: Sep 2007
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From: Australia
I've resurfaced hundreds of Evo flywheels personally and professionally.
Just for ****s and giggles I reconditioned my exedy twin plate replacing the friction disc's machining both the flywheel and pressure plates the old guys at the workshop just shook their heads, stood back and watched. Our Exedy guy also said it was a terrible idea
It lasted another 35'000kms of abuse.
So yes I would re-use a evo flywheel as long as its not cracked or excessively warped, professionally I wouldn't take off anymore than 0.08mm/0.003ish" Personally 0.16mm or 0.0065" hahahaha yea boi
Just for ****s and giggles I reconditioned my exedy twin plate replacing the friction disc's machining both the flywheel and pressure plates the old guys at the workshop just shook their heads, stood back and watched. Our Exedy guy also said it was a terrible idea
It lasted another 35'000kms of abuse.
So yes I would re-use a evo flywheel as long as its not cracked or excessively warped, professionally I wouldn't take off anymore than 0.08mm/0.003ish" Personally 0.16mm or 0.0065" hahahaha yea boi
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