Flywheel Resurfacing

[Zelus]

Hello all!

So, I've got a '73 340 that was balanced, but now has a ruined clutch and (very likely) a burnt flywheel.

What are my odds on having the flywheel resurfaced and maintaining most of the benefit from the balancing?

What sort of limitations are there on resurfacing? I know the engine is on its 4th bore, but I never measured the flywheel before bolting it up.

The issue present that has caused the damage are 2.7 rear end gears, with 24.5 inch tires (18.9 MPG freeway, but absolutely terrible starting out; clutch would slip before tires would).
It was fine in the beginning, as I was only lightly driving it, mostly freeway miles, but now I plan to install a real rear-end (3.55+ gears), replace the clutch, et cetera.
I garaged the car after I realized that I could cause the clutch to slip just by exceeding 4000 RPM.

Thank you!

 

[RLF Cuda]

As they take only a few thousandths off the flywheel in an even cut, and it is symetrical, all should be well.

 

[oldkimmer]

.........i think i may have 1 but shipping will b expensive..............kim........

 

[66durgederp]

just make sure the shop that does it uses a cup grinder/rotating deck resurfacer, and you do not want it to look like a mirror, its necessary to have a somewhat "rough" finish on them, you also dont want the record type finish that happens with a machine that uses a bit. I resurface flywheels everyday at work, the most ive ever taken was .050" for a 12 valve cummins that had the dog snot beat out of it, A. it was messed up because it had hard spots in it, and B. the problem was exacerbated because someone who didnt know any better tried to resurface it with a cutting bit (like a brake rotor) and the hard spots wouldnt cut, at all. with a mechanical linkage youll be ok because the adjuster should take care of any issues. we run into the most problems with hydraulic clutches that only have so much throw to them, thats when the crank-to-flywheel shims come into play....

 

[67Dart273]

the problem was exacerbated because someone who didnt know any better tried to resurface it with a cutting bit (like a brake rotor) ..

This problem is made worse as Ammco (and maybe others) actually sell a flywheel turning accessory for their brake lathes. We used to do a few "back then" on our old Van Norman, and had about a 70% good rate out of say, 10 wheels. We quit doin it as we felt as you, it's hard on a brake lathe, the hard spots are a huge problem (pun intended) and of course the customer still has to find a solution.

 

[sireland67]

If you have really burnt the flywheel, check it real good for any cracks.
At least half of all 70's era mopars that I have taken apart had heat cracks in the surface of the flywheel.