How many times can you cut a flywheel?

KLF · 10-09-09, 09:54 AM

I've done 2 tranny/clutch swaps in the last 2 weeks. I found a new machine shop just up the road to have the flywheels turned (I take in a spare ahead of time), old place behind a house, you know the type. The first one was no problem, driving it now, works fine. When I dropped the second one off, he looked at it and said I probably shouldn't use it, as it had been turned before (could tell by the scalloped ridges still visible in the outer face). He said that after turning them more than once or twice, the slave won't be able to reach, and shifting will be difficult, especially going into 1st at a stop. I had him do it anyway, it's installed now and works fine.

But I guess it kinda sorta does make sense. I've never come across this before, is there a minimum thickness spec somewhere?

I was also thinking that if it was too thin and wouldn't work any more, you could fix it by sticking a washer under the pivot post inside the bellhousing, to make it stick out a little more. Wondering if this would work...

toy4xfun · 10-09-09, 10:14 AM

hey i just looked in my toyota manual and did not see one. there could be but it is not in my manual. and i would also think like a brake rotor if it is too thin it could warp.

cruiser88 · 10-09-09, 02:33 PM

No experience on Toyota but my old Ranger could only be turned once.......of course it depened on the warpage.

hardontoyotas · 10-09-09, 07:03 PM

the machine shop should be able to tell you if it could be resurfaced

toy4xfun · 10-09-09, 08:53 PM

the only problem is where to find the thickness specs they should be in a toyota manual but there is nothing in mine. my manuals #is 36246a printed in japan. and it is for 1985 truck and 4runner.

hardontoyotas · 10-09-09, 08:55 PM

i have the repair manuals that the toyota dealers have and they don't say

toy4xfun · 10-09-09, 09:01 PM

i know that is the one i have so how do you know when to stop turning it. with no specs not to mention if you turn it and it warps the damage that could do. so what is the specs on the thickness of a flywheel off of a toyota.

KLF · 10-09-09, 10:24 PM

I checked my '86 FSM, can't find anything. I also looked all over one of my spare flywheels, I can't find anything.

Sounds like a question for Marlin. If anybody will know, he will.

toy4xfun · 10-09-09, 10:29 PM

ask him and let us know, please i for one would need to know that info.

hardontoyotas · 10-11-09, 08:00 AM

every time i have sent a flywheel to the machine shop they have told me whether i could use or i had to get a new one.

KLF · 10-11-09, 10:33 AM

Quote:

Originally Posted by hardontoyotas

every time i have sent a flywheel to the machine shop they have told me whether i could use or i had to get a new one.

Well then call them up, ask them the secret.

raydouble · 10-11-09, 04:31 PM

The only thing I'm seeing in all the manuals I have is about the flywheel runout.......
Is there any number stamped on it that it could be?

raydouble · 10-11-09, 06:23 PM

Maybe, someone at Marlin would be able to tell you?

hardontoyotas · 10-12-09, 02:58 PM

let me do sum searching. ill let you know

toy4xfun · 10-12-09, 07:28 PM

i sent a pm to jim.

toy4xfun · 10-17-09, 06:55 PM

jim pmed me back.will try to post it up.

NorCalBorn · 10-18-09, 12:22 PM

I have no tech to add here, but since I've been saving this up for this long I should get it out of my system and at least hopefully make you guys laugh..

Quote:

How many times can you cut a flywheel?

Huh, I thought they were all Emo and cut themselves?

OK, I'll shut up now.

toy4xfun · 10-19-09, 06:25 AM

alright here is what jim had to say.

Re: mininum thickness of a flywheel on 84-89 4 cylinder
Quote:
Originally Posted by toy4xfun
is there one we have a descusion on here right now and no one can find any in there manuals. i have toyota manual for 85 trucks and 4runners. and have found nothing. and was wondering if you new any thing.
I don't know, but here's what makes sense to me; I would think you could do a clean-up pass on the flywheel (for flat surface) without a problem because the only change is that the clutch disc will ride on a slightly different spot on the input shaft splines (no biggie), and the slave cylinder might need a slight adjustment (another no biggie)????

KLF · 10-19-09, 08:17 AM

That was no help at all.

I gotta order a couple small things from Marlin soon, I'll try to remember to ask.

cruiser88 · 10-19-09, 08:19 AM

I dont think there is a spec