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Author Topic: How to I.D. chromoly flywheel?  (Read 2779 times)
bugnut68
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« on: November 03, 2008, 18:39:00 pm »
Just looking for some tips on how to identify a chromoly flywheel off of visuals?  Are there any clues as to give away a flywheel's identity as cast or otherwise?
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Peter
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« Reply #1 on: November 04, 2008, 00:06:13 am »
forged flywheels ring like a bell when you strike them with a wrench
a cast one wil sound more dull

cheers, Peter
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deano
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« Reply #2 on: November 04, 2008, 01:24:59 am »
Yes, if you drop it on your foot, and you hear a ring, it's chromoly.
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Eric Ellis (57HotrodVW)
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« Reply #3 on: November 04, 2008, 01:33:41 am »
Quote from: deano on November 04, 2008, 01:24:59 am
Yes, if you drop it on your foot, and you hear a ring, it's chromoly.

Hmmm, I'd think the sound made in that scenario would be more like @#$%^&*!!!  Grin
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Eric Ellis
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bugnut68
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« Reply #4 on: November 04, 2008, 02:08:40 am »
Quote from: deano on November 04, 2008, 01:24:59 am
Yes, if you drop it on your foot, and you hear a ring, it's chromoly.

Shoot, I guess my clumsiness is well-known...Grin
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Bruce
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« Reply #5 on: November 04, 2008, 03:02:06 am »
Briefly touch it with a grinder.  Yellow sparks = steel, orange sparks = cast iron.
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javabug
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« Reply #6 on: November 04, 2008, 03:27:22 am »
Make sure you do the grinder test AFTER its been balanced.   Wink
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Mike H.

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deano
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« Reply #7 on: November 04, 2008, 03:33:11 am »
I believe the chromoly flywheels have a smoother overall machine finish, than compared to OEM VW. Cast ones have a separate ring gear and usually say something like, "Premium" on them.
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bugnut68
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« Reply #8 on: November 04, 2008, 03:35:44 am »
Thanks folks... I'll have to take a closer look at what I've got, but I'm pretty sure this one doesn't have a separate ring gear... that much I'm pretty sure of.
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