Can the flywheel be resurfaced?
 

After almost 80K of daily bumper to bumper commuting it's time for a new clutch and my mechanic wants to know if the flywheel can be resurfaced or if it has to be replaced like some Minis.

Thoughts?

I have not found a place that would touch a resurface, but I have scuffed the surface of four OEM flywheels for re-use and no issues.

scuffing is half assing it. you can get the flywheel for under 400 bucks and know its good to go. fidanza has replaceable inserts for 50 bucks a pop and the flywheel is under 400 bucks.

spend the money and know it is done right. if a flywheel comes apart due to cracks its only your feet right??

If you want to stay stock dual mass you will not find one less than 950.00. Also call is half ass or not it works quite well, for free. No chatter, no noise, no issues.

Also no one has cracked a dual mass stocker.

i got mine resurfaced, but special equipment is required to do it on a dual mass

http://www.mazdaspeedforums.org/foru...t-flywheel.jpg

I would have too, but no one with in 400 miles would touch it:sigh:. Most places blow it off and say "you can't resurface a dual mass" I just said ok, click. After two weeks of looking I scuffed the surface at my shop and threw her back in with new clutch, TOB, and PP. Done. I have since done two more but my preference would be to resurface if available.

send it here

Falcon Clutch Specialist

this is also where he made the custom ceramic clutch, no change in pedal feel at all (srsly), and holding up to BT for about 18k now, no issues

Not to get to off topic what did they charge you?

rebuilt flywheel, rebuilt pressure plate and custom ceramic disc was 700

http://www.mazdaspeedforums.org/foru...sure-plate.jpg

http://www.mazdaspeedforums.org/foru...new-clutch.jpg

my experience the scuff does not get rid of the hot spots. hots spots harden the metal and wear differently than the surrounding material. this difference in wear can cause stress which leads to cracks. these can be spotted by the annealing colors on the primary and secondary flywheel surfaces. 25 years racing manual transmissions have shown no matter what brand or type hot spots are the enemy.

for a stock car then yes it can get by fine but if your building tons of heat with street racing or track days it is a concern of the flywheel integrity. either way i would not want to be giving advice of anything other than the correct way. if you paid to have your clutch replaced would you want to go to the shop who only scuffs a flywheel or would you want it done right?

did you have the flywheel sonic tested or xray for micro fractures?? did you check the primary and secondary flywheel surfaces? if not then you can't say nobody has cracked one. doubt anyone has taken the time to check and only look with their eyes. the rotational mass of the flywheel at rpm is forces enough to send the flywheel through the floor board like it was card board. if you abuse the clutch be prepared to pay to play


not calling you out so no reason to get defensive. if it was my car i would have replaced. dual mass flywheels are not made to be resurfaced or even be reused they are made to be a wear item and replaced. some dealerships say the manufacture says it can be reused for one clutch change if the mating surface is flat and free of hot spots. all im saying is the right way isn't always the cheap way. i can cross the street every day without looking and say it is perfectly safe because i have never been hit

Nor am I disagreeing with your general statement. I track my speed often VIR, gingerman, CMP, AMP I have 130k on mine on the original dual mass/ second clutch 90k @> 315/375 and 20k @ 400/400. I have also completed this on 2 other speeds @> 300/360 and 450/450 respectively with no issues of noise, vibration or failure. Nor have I heard of any speed under any condition cracking a stock dual mass or even having any problem with a stock flywheel. So I think telling OP of my success in the real world with this platform is ok and allows him to decide on his own what he would like to do. Mazdaspeed does not
= the same as all other vehicles.

As stated above I looked long and hard to try to find a location to resurface my dual mass stocker with no success. I also at that time was not super comfortable in doing it. After doing it and with how I use my speed, I have no problem with recommending this on our vehicles...

No problem. Most places wont turn them due to liability when the manufacture of the flywheel says not to do it


Tap tap tap a roo

Most places will not turn a dual mass due to not having equipment to be able to "true" a moving surface. Not a liability. a Non-ability.

SACHS makes most of the dual mass i have used and they say in the service notes not to surface them. just thought that was across the board thing for all dual mass.

Pretty much any place that can turn rotors can turn flywheels also. There is an adaptor for the lathe. It's all going to depend on if your flywheel is within specs to be able to turn.

good to know. thanks for the extra info. and i stand corrected.