1G QM 8 Leg Twin odd disk wear

[Anfurnyy]

Looking for some insight on what might be going on with my QM twin disk.

I'll start by saying that it seems to release just fine with nothing weird happening or issues so to speak but when I pulled the clutch to replace rear main seal I saw an odd wear pattern between the disks and floaters.

Just for transparency sake, I bought the clutch used. the disks are NEW with probably 500-600 miles on them. Street driving only. I did not replace the floaters or pressure plate when I replaced the disks.

As you can see from the pictures below, some of the disks / floaters have wear on the outside, and then the other set has wear on the inside.

Looking for some ideas on what this might be, why it might be happening and if it's an issue or will be an issue?
Pictures SHOULD be in order of flywheel -> clutch cover with pictures of each side of the disks and floaters.

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[twicks69]

Either the disks were not square, or there is warpage to the pressure plate, floater plate and flywheel friction surface.

 

[Anfurnyy]

Either the disks were not square, or there is warpage to the pressure plate, floater plate and flywheel friction surface.

I did straight edge the floater, and pressure plate after work and they were definitely warped.

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[Anfurnyy]

Either the disks were not square, or there is warpage to the pressure plate, floater plate and flywheel friction surface.

Would it be acceptable to replace just the floater and pressure plate?
The flywheel friction side looks fine to me, but I'm no expert

 

[twicks69]

Measure flatness of the flywheel also. Yeah, your pressure plate and floater plate look warped, you could do a feeler test and see if it is greater than 0.004" which is max limit, but based on the photos you posted I would say that they are past spec limit.

The flywheel step height is 0.100". Check its flatness as well. It might need a clean up.

 

[Anfurnyy]

Measure flatness of the flywheel also. Yeah, your pressure plate and floater plate look warped, you could do a feeler test and see if it is greater than 0.004" which is max limit, but based on the photos you posted I would say that they are past spec limit.

The flywheel step height is 0.100". Check its flatness as well. It might need a clean up.

Oh I guarantee it's over .004 just looking at it.
I'll check both of the flywheel specs tomorrow. Thanks

 

[Anfurnyy]

Measure flatness of the flywheel also. Yeah, your pressure plate and floater plate look warped, you could do a feeler test and see if it is greater than 0.004" which is max limit, but based on the photos you posted I would say that they are past spec limit.

The flywheel step height is 0.100". Check its flatness as well. It might need a clean up.

These are the measurements I got for the step height.

My dial indicator was on a mount outside of the flywheel (maybe wrong?)

I marked a spot with sharpie just outside of the friction area and set the gauge there and zeroed the gauge out the best I could. It kinda moved Everytime I tried to zero it so Everytime I adjusted the zero mark I tapped the center of the flywheel with my fingers to make the gauge "settle"

Once settled I gently pushed the indicator probe up and moved the flywheel closer and set the dial indicator probe on the marks that I've marked on the actual fraction surface and then tapped the center of the flywheel again to "settle" the gauge. I did one mark on the outside and inside of the friction surface to measure runout and always zeroed off the external mark before measure either again.

I'm not sure how accurate this really was, maybe I should try again and move the dial indicator to the inside of the flywheel? It's one on a magnetic base. Nevermind that's dumb and won't let me move the the indicator

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[Anfurnyy]

Measure flatness of the flywheel also. Yeah, your pressure plate and floater plate look warped, you could do a feeler test and see if it is greater than 0.004" which is max limit, but based on the photos you posted I would say that they are past spec limit.

The flywheel step height is 0.100". Check its flatness as well. It might need a clean up.

If I take the flywheel in to have it cleaned up and machined flat- however much they take off the friction surface, they should also take off the top of the "posts" that the clutch cover bolt to the flywheel with, right?

 

[twicks69]

It would be easier to unbolt the legs and take a couple thousandths off the leg mounting surface after the friction surface has been machined flat.

 

[Anfurnyy]

It would be easier to unbolt the legs and take a couple thousandths off the leg mounting surface after the friction surface has been machined flat.

Okay good to know. but regardless, if they take some off the friction surface the same amount needs to come off those legs?

 

[twicks69]

Instead of grinding down the legs, the outer edge flat surface where the legs bolt to can be ground down to get back to the 0.100" step height.

 

[Anfurnyy]

Instead of grinding down the legs, the outer edge flat surface where the legs bolt to can be ground down to get back to the 0.100" step height.

That's exactly what they did. Should be going back together today.

I've got new floaters, any break in period for those?
I know QM mentioned something like 200 miles of regular driving when I bought the new disks from you last year.

 

[twicks69]

Yeah, nothing crazy, just normal street mileage with regular shifting to break in the clutch.