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Dead flywheel
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Hayato
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Joined: 17 Nov 2006
Posts: 27

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PostPosted: Fri Feb 15, 2008 11:01 am    Post subject: Dead flywheel Reply with quote

Hello everybody,
Well, this weekend I removed the engine from the car, to paint it, but I faced a problem.

When I removed the clutch, the clutch disk was worn out unequally (just inside), the pressure plate and the flywheel were blue and full of cracks. Evil or Very Mad

Well, I'll try to send the flywheel to a speciallist. But I don't know if the flywheel had been "reworked" before, anyone knows its original thickness? (C8ZE - 8880 - A).
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MufflerBearings69
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Joined: 22 Jul 2007
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1968 Ford Galaxy

PostPosted: Fri Feb 15, 2008 3:24 pm    Post subject: Reply with quote

Scoped out the books I have, as I suspected I have no valid info.

If anyone has insight as to where to find specs from those factory numbers, I would love to hear it.
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10sec.et
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Joined: 29 Mar 2006
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Location: Houston,Texas
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1969 Oldsmobile Cutlass

PostPosted: Fri Feb 15, 2008 3:33 pm    Post subject: Reply with quote

what vehicle ? some flywheels can be resurfaced a couple of times while others can not. there are shims available to put between the flywheel and the crank to make up the difference after machining.
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af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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Big Dave
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PostPosted: Fri Feb 15, 2008 5:20 pm    Post subject: Reply with quote

A blued and checkered fly wheel that is thin already is an accident waiting to happen.

I personally have see inside Don Garlits foot shortly after his explosion left him an inch or two shorter. You do not want to see something like that (he was actually showing his foot to Jon Zorian, his machinist, while I was in the shop getting my pistons fly cut. Since neither of them are towering giants it was easy for me to look over Don's sholder).

Even if this is a stock application, is never, ever going to be raced (that means a teenager can never get behind the wheel), I still recomend at the very least a new replacment FOMOCO fly wheel. If there is a teenager in your household, a SFI rated flywheel would be my priority.

Big Dave
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Knarley Darley
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PostPosted: Fri Feb 15, 2008 8:28 pm    Post subject: Reply with quote

That flywheel is junk. The reason the disc is thinner on the edge is because the flywheel is bowl shaped from the heat and being to thin already. You would wear out a surfacer trying to get it flat again. That will only make it thinner and the problem will come back even faster.
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Hayato
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PostPosted: Sat Feb 16, 2008 11:09 am    Post subject: Reply with quote

Thank you all.

Well, the it's C8ZE - 8380 - A, not 8880.

I'll look for a new flywheel, but here it's very hard to find a new one.

The disc inside edge is worn out.

10 sec., the car is a Ford Galaxie Landau. The manual says that the flywheel can be machined up to 0,045".
But before that I need to know its original thickness, to know if it was machined before.
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MufflerBearings69
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1968 Ford Galaxy

PostPosted: Sun Feb 17, 2008 12:18 pm    Post subject: Reply with quote

Curious where you are at that it will be hard to get?

Awesome to see another Galaxie guy on the forum! Mines a 68 formal roof Very Happy
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Hayato
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PostPosted: Sun Feb 17, 2008 6:19 pm    Post subject: Reply with quote

Hail,

Well, I'm in Brazil.
V8s became unpopular after the 80's here, due to the high gasoline price.

Mine is a 78 Galaxie Landau (its design remember a '67 Galaxie 500 with some '67 Lincoln Continental traces).
Formal roof with vinyl.

This is not mine:
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10sec.et
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1969 Oldsmobile Cutlass

PostPosted: Sun Feb 17, 2008 6:43 pm    Post subject: Reply with quote

using that flywheel is going to be a judgement call on your behalf. i always recommend a new flywheel but its not always possible. i have seen some pretty rough flywheels be resurfaced and live a long life in 1 ton trucks. i dont recommend it and highly discourage the use of a potentially dangerous part but its up to you and your machinist to decide wether to use it or scrap it.
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af2 wrote:
It seems we can look at our magical Balls and come up with a fix?

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Hayato
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PostPosted: Mon Jul 21, 2008 6:39 pm    Post subject: Reply with quote

Hello,

What are the advantages of using a ductile iron flywheel over a cast iron one, and vice-versa?

Thanks
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Big Dave
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PostPosted: Tue Jul 22, 2008 5:48 am    Post subject: Reply with quote

Ductile iron (nodular iron) is a low grade steel (all carbon burned out) but no carbon was ever added back in as an alloying agent the way steel is made. It is stronger in that it is more ductile and not as prone to shattering the way cast iron is because of the way it is cooled after being cast into ingots.

It gets it's name nodular iron from it's grain size (large course balls) which is not the way you want your grains to be in a steel (were a finer grain size is an indication of greater care taken in the cooling and heat treat cycles of the process).

Big Dave
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Hayato
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PostPosted: Sun Jul 27, 2008 8:54 pm    Post subject: Reply with quote

Thanks for the reply, Big Dave.

I'm filling this post with questions, sorry for that...

Which clutch brand do you prefer, Zoom or RAM?

Thanks
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af2
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1933 Willys Coupe

PostPosted: Sun Jul 27, 2008 9:01 pm    Post subject: Reply with quote

Zoom is China at this date! Ram would be my choice given the other.
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Hayato
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PostPosted: Mon Jul 28, 2008 9:15 am    Post subject: Reply with quote

Thanks,
Chinese clutch, american engine, does not seem a good "mixture". Cool
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Paul P
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1971 Chevrolet Chevelle

PostPosted: Mon Jul 28, 2008 9:51 am    Post subject: Reply with quote

Something Wong with that yes!
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