To Use Or Not To Use? - Flywheel

Hi Guys.
So i needed to replace my clutch, and once the clutch was out and i had inspected the flywheel, it seemed to be in pretty bad shape, some pretty ordinary looking heat marks and also cracks.
So i put the feelers out to get a decant second hand replacement, which i got and bought site unseen.

So, the pics speak for themselves, it looks like it may have been machined already quite a few times, or a lot at once, 2 out of the 3 balancing drill holes have been machined through and the third would do the same id imagine if it were to be machined again.
Also, hard to see in the pic, a couple of "big"looking cracks.

What are every ones thoughts?
Anyone come across this before?

When i showed it to the fella who has done some machine work for me in the past, He kinda screwed his nose up and said "OOhh well, yeah, not sure about that mate, totally up to you though"which didnt fill me with confidence lol

Let me know what you all think.

Cheers

Col

 

I would bin it ! It's not worth the risk ....... imagine the damage a flywheel would do if it let go

Why waste time and money machining (and fitting) a dodgy flywheel ?

If your budget won't run to a new flywheel, don't settle for anything less than a fantastic condition used one.

 

I tend to agree with you, i guess i was hoping that the condition of the flywheel was better than what is is.

Has anyone seen or heard of a 300zx flywheel failure?

 

2nd hand flywheels are under $100 man.

 

The machining isn't the issue, provided it's been machined true, make sure you put a dial gauge on it.
Cracks like that in the face - bin it!

 

Find me a good one under $100 delivered to me and I’ll buy it

 

Find a new one. If you've got the money the Jun ones are lovely.

 

What’s a new one worth? Can we buy locally?
Buying anything grime the States at the moment is crazy expensive.

Are the JUN chromoly? Lighter?

 

Hi Rob.
That clutch is “no longer with us” lol but I have another Jim Berry with the same specs as that, so yeah a shit load of clamp force.
When I was talking with Jim on the phone about the dimise of that clutch in question ( I ended up having him rebuild it) he said to use OEM or a good quality chomoly flywheel.
The only chromoly ones I can find are a lot lighter, around the 5.9 kg area, so not sure if they would be ok or not.

What’s a new OEM one worth here in Aus?

 

I was very happy with my Jun one with a heavy duty organic Exedy, and also with a brass button 5 puk. No worries with judder or slip. Pulled it out a few times and it was always in great condition. It's only a bit lighter than standard.

I've driven a few with the superlight ally fly's and they were horrid to drive with.

 

Hi Chrispy
Do you know what clamp pressure those clutches had?

 

No idea. But had no issues with the V8 or the modded TT. Was a NA fly/clutch as well.

 

NA flywheel and a heavy duty single (same as R33 GTST) can handle 500HP without issues.

I agree a used flywheel is probably $100. Try Jamie Cole.

 

Had a Jun flywheel, highly recommend these.
What's it matter how much it costs?
If you want a high quality item, spend the money.

 

I agree that generally you pay the price for a high quality item, and of coarse it matters how much it cost because i have a budget just like most people do.
But why spent the money on a high ticket item, if you can get the same result at a cheaper price.

 

Out of curiosity, what’s can you sell a Jun flywheel for?

 

These are surface heat cracks, your clutch has been slipping....get it machined , cost around 60 to 100 dollars.
Or if undecided get a new one...they are not expensive...around 200 to 250

 

Hi mate.
Yeah it most definitely was slipping.
I think they are too deep to machine out.

Point me in the direction of a $200 new OEM and I’m on it

 

haha, me too