Hi everyone, my mechanic will soon be replacing the clutch in my 2003 Wrangler (4.0L, 5 speed manual). I ordered a LUK LFW193 flywheel incase the flywheel on the car is damaged and needs to be replaced. I noticed some marks on the flywheel and I was wondering if anyone had seen these types of marks on their new flywheels and if they're normal marks from the manufacturing process, or if they're defects. I ordered it from rock auto and I'd rather not have to return it, but I will if these marks mean that the flywheel is actually damaged. The rest of the part looks good. Thanks for the help.
Question about LUK flywheel
- Thread starter ftft0101
- Start date
I
t’s not uncommon for new flywheels to have some minor cosmetic imperfections or machining marks from the manufacturing process. These marks can include light surface scratches or marks from the tooling used during production.
However, it’s important to differentiate between normal manufacturing marks and any damage that would affect performance. Here are a few things you can check:
Run your hand over the flywheel surface. If it feels smooth and there are no deep gouges or significant irregularities, it's likely fine.
If the marks are purely surface level, they shouldn't be an issue. If you can feel any grooves or if there's enough depth to catch a fingernail, that might be a concern.
You can also check for warping by laying a straight edge across the flywheel. If there’s wobbling or significant gaps, it may be worth consulting with your mechanic.
At the end of the day, discussing your concerns with your mechanic is the best route. They can inspect it closely and ensure everything is within tolerable limits.
From looking at the photos I'm having a hard time telling if those scratches are simply surface level or if they are deeper.
If the flywheel meets these criteria and your mechanic gives it the green light, you should be good to go! Otherwise, returning it for another would be the safest option. Good luck with the clutch replacement!
The TJ flywheel surface is not flat, it's parabolic. Putting a straight edge across it tells you nothing.
AI doesn't know shit about flywheels on a 4.0L!
How do we report this AI chat bot?
PNW_LJ
Member
Thanks for the responses everyone. I decided to exchange the flywheel since I am exchanging the clutch as well. The luk clutch kit I ordered included a clutch disk that was chipped on the edge. The package was sent from a Rock Auto return center, so it's possible that someone had already returned the items that they sent to me.
Well, when you get the new one, if you decide to put it in the Jeep, be sure to compare the crank sensor timing notches to the old one. There were some that were not indexed correctly recently. I don't remember the brand or specific year. But it would suck to complete the install and the Jeep not start.
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