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Old 12-18-2009, 01:16 PM   #1
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Should I have my Flywheel Machined??

I have heard 2 different answers. One member claims to have the Flywheel machined with my new clutch installation, and another seemed very adament about NOT having it machined because they are different in shape then most flywheels. Any Advice?
Thanks

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Old 12-18-2009, 02:37 PM   #2
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Only thing I can offer is I have never heard of getting a flywheel machined with a clutch install on jeep or any other car, suv etc.

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Old 12-18-2009, 02:44 PM   #3
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Yes, get the flywheel machined. If a clutch has failed, the flywheel is most likely glazed. Think about brakes. If the rotors have been on there quite a while, you either machine them or replace them, correct? Machining the flywheel will guarantee that the friction surface is completely flat. No warpage or high/low spots.

And whoever said that the flywheel is a different shape is BS'ing you. Take your flywheel to napa and tell them you want it machined. Go back in a day or two and it'll be ready for pickup.
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Old 12-18-2009, 03:29 PM   #4
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Per the TJ Factory Service Manual that is emphatic on this, do not machine the flywheel. If there is any glazing present, simply use a bit of emory cloth or a light gauge sandpaper to remove the glaze.

The reason the TJ's flywheel should not be machined is because it has a special but barely noticeable dome shape that would be removed if it were machined. No, this is not a rumor either. The FSM is careful to explain that for why the flywheel should not be machined.
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Old 12-18-2009, 04:42 PM   #5
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I'll back Jerry up on this. I've never heard of it before but I looked in my FSM and he is correct. I've always had the flywheel resurfaced when doing a clutch but I've never had to on a Jeep flywheel.

This is word for word from the FSM
Quote:
Originally Posted by FSM
Inspect the flywheel whenever the clutch disc,
cover and housing are removed for service. Check
condition of the flywheel face, hub, ring gear teeth,
and flywheel bolts.
Minor scratches, burrs, or glazing on the flywheel
face can be reduced with 180 grit emery cloth. However,
the flywheel should be replaced if the disc contact
surface is severely scored, heat checked, cracked,
or obviously worn.
Flywheel machining is not recommended. The flywheel
surface is manufactured with a unique contour
that would be negated by machining. However,
cleanup of minor flywheel scoring can be performed
by hand with 180 grit emery, or with surface grinding
equipment. Replace the flywheel if scoring is
deeper than 0.0762 mm (0.003 in.).
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Old 12-18-2009, 05:13 PM   #6
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Quote:
Originally Posted by seanpmcd View Post
I have heard 2 different answers. One member claims to have the Flywheel machined with my new clutch installation, and another seemed very adament about NOT having it machined because they are different in shape then most flywheels. Any Advice?
Thanks
If you want the FSM for yout TJ pm me with your year.
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Old 12-18-2009, 11:14 PM   #7
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I've always turned the flywheels with a clutch job as well. However, I have never done a clutch on a Jeep either. Since the FSM says don't turn it, I won't when the time comes.
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Old 12-19-2009, 01:04 AM   #8
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From that "other adamant" member.

Again....DO NOT have the flywheel turned.

Quote:
Originally Posted by Jerry Bransford View Post
Per the TJ Factory Service Manual that is emphatic on this, do not machine the flywheel. If there is any glazing present, simply use a bit of emory cloth or a light gauge sandpaper to remove the glaze.

The reason the TJ's flywheel should not be machined is because it has a special but barely noticeable dome shape that would be removed if it were machined. No, this is not a rumor either. The FSM is careful to explain that for why the flywheel should not be machined.

Any other questions you may have about changing out your clutch/flywheel and or any other question you may have let us know.
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Old 12-19-2009, 03:21 PM   #9
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I stand corrected.
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Old 12-19-2009, 06:05 PM   #10
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Does anyone know what year they started putting a domed shaped flywheel in the Jeeps?
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Old 12-20-2009, 04:42 AM   #11
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My 94YJ FSM says the same thing so it isn't just a TJ thing.
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Old 12-20-2009, 12:35 PM   #12
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^^^ so does the FSM for the 88 wrangler I have.

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