Resurfacing flywheels

venturaII · **Posted:** Thu Nov 10, 2016 4:52 pm

My wife's KJ has ~155K miles on it now and she's been complaining of a funny smell lately. I finally got a small whiff of it and it's clutch, so I'm getting things together for this repair. The clutch kits out there (like at rockauto.com) seem decently priced and complete, but I just realized that the 3.7 uses a dual mass flywheel, which from my understanding cannot be reliably resurfaced. Is this true, and what are my options at this point? Simply scuff up the existing flywheel and hope all is well? Replace with a single mass flywheel? Buy another dual mass one? Or trust my local automotive machine shop to take the time to set up the dual mass and have them resurface anyways (they have a great reputation)?

If anyone has had their OEM flywheel resurfaced, please chime in! Thanks.

venturaII · **Posted:** Thu Nov 10, 2016 5:10 pm

Hmmm...might've gotten wrong info...it looks like dual mass flywheels started in 2005; my 2004 should use a standard flywheel with a sprung clutch disk...can anyone confirm?

tjkj2002 · **Posted:** Thu Nov 10, 2016 6:39 pm

It doesn't matter what flywheel you may or may not have in your KJ you can not machine any of them.

There not machined flat from the factory and unless your machine shop can machine the exact same concave shape you will have issues within 5000 miles.

Replace,replace,replace.

dennyb · **Joined:** Wed Aug 13, 2014 4:27 pm **Posts:** 110

Before eliminating resurfacing take to machine shop. Have machinist tell if feasible. It might get too thin and throw off engagement. Save a few $ if possible. Even rockauto is 350 for flywheel and says dual mass. New has new springs or what they use inside.

adamkrz · **Posted:** Tue Nov 15, 2016 10:34 am

Well - on my 04 new flywheels were not available, I purchased a used one with no wear just in case i needed one but when I replaced the clutch I checked the old one which was just fine - scuffed it per the service manual.

I will add that both flywheels (03 - 04) are flat as a pancake.

PS. Rockauto has alot of wrong cheap parts that didn't work for me, Went with a mopar replacement clutch.

tjkj2002 · **Posted:** Tue Nov 15, 2016 7:55 pm

adamkrz wrote:

Well - on my 04 new flywheels were not available, I purchased a used one with no wear just in case i needed one but when I replaced the clutch I checked the old one which was just fine - scuffed it per the service manual.

I will add that both flywheels (03 - 04) are flat as a pancake.

PS. Rockauto has alot of wrong cheap parts that didn't work for me, Went with a mopar replacement clutch.

They look flat but are not when measured with with a micrometer.

Myke · **Posted:** Wed Nov 16, 2016 11:58 am

tjkj2002 wrote:

adamkrz wrote:

Well - on my 04 new flywheels were not available, I purchased a used one with no wear just in case i needed one but when I replaced the clutch I checked the old one which was just fine - scuffed it per the service manual.

I will add that both flywheels (03 - 04) are flat as a pancake.

PS. Rockauto has alot of wrong cheap parts that didn't work for me, Went with a mopar replacement clutch.

They look flat but are not when measured with with a micrometer.

What is the purpose of having them concave? To insure a more even contact/pressure distribution under load?

tjkj2002 · **Posted:** Wed Nov 16, 2016 11:20 pm

Myke wrote:

tjkj2002 wrote:

adamkrz wrote:

Well - on my 04 new flywheels were not available, I purchased a used one with no wear just in case i needed one but when I replaced the clutch I checked the old one which was just fine - scuffed it per the service manual.

I will add that both flywheels (03 - 04) are flat as a pancake.

PS. Rockauto has alot of wrong cheap parts that didn't work for me, Went with a mopar replacement clutch.

They look flat but are not when measured with with a micrometer.

What is the purpose of having them concave? To insure a more even contact/pressure distribution under load?

Clutch chatter.

Resurfacing flywheels

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