| syncroserge |
Thu Nov 30, 2023 2:43 pm |
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Autopsy might be too strong a word..I did not look for a smoking gun, just thought I would share..
Anyways that's what happens when you leave dead parts around a man with a grinder and some spare time 8)
Before..
Friction surface removed..
Ring gear assembly removed..Wo..that's a lot of springs..spacers between springs are plastic
All that you see or seem is but a spring within a spring..within a spring..
Feels like something interesting inside the core..
Indeed..two little gears are nylon..
8) |
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| DanHoug |
Thu Nov 30, 2023 2:45 pm |
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| very cool!!! |
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| Sodo |
Thu Nov 30, 2023 6:08 pm |
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Awesome.
Thats a lot of monkeybusiness.
How is all that stuff lubed?
How was it 'dead' ? |
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| skills@eurocarsplus |
Thu Nov 30, 2023 6:19 pm |
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Sodo wrote:
How was it 'dead' ?
they chatter and (i'm gonna fuck this up) they get play in the "face" where the disc contacts. basically the "face" wobbles.
When I have seen these fail, it's usually for noise more than anything. |
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| syncroserge |
Thu Nov 30, 2023 6:22 pm |
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Sodo wrote: Awesome.
Thats a lot of monkeybusiness.
How is all that stuff lubed?
How was it 'dead' ?
It was making the usual "handful of nuts in a coffee can" noise of when they fail.
A lot more rotational play than a good one.
The spring assembly and the core with the small gears are generously filled with grease.
Appears to me to be thick molly type. |
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| Sodo |
Thu Nov 30, 2023 6:27 pm |
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syncroserge wrote: Sodo wrote: Awesome.
Thats a lot of monkeybusiness.
How is all that stuff lubed?
How was it 'dead' ?
It was making the usual "handful of nuts in a coffee can" noise of when they fail.
A lot more rotational play than a good one.
The spring assembly and the core with the small gears are generously filled with grease.
Appears to me to be thick molly type.
So they can't be opened/cleaned/maintained?
I wonder if you could drill some holes and shove all the old grease out, then weld up the holes? |
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| syncroserge |
Thu Nov 30, 2023 6:27 pm |
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skills@eurocarsplus wrote: Sodo wrote:
How was it 'dead' ?
they chatter and (i'm gonna fuck this up) they get play in the "face" where the disc contacts. basically the "face" wobbles.
When I have seen these fail, it's usually for noise more than anything.
Exactly..they are suppose to fail in a way that gets you home i.e. the little plastic spacers
contact one another and allow it to be usable but it makes quite a ruckus ! |
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| syncroserge |
Thu Nov 30, 2023 6:34 pm |
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Sodo wrote: So they can't be opened/cleaned/maintained?
No, it's all riveted and crimped together.
VW had some issues in the beginning with a lot of failures but supposedly re-engineered it.
Issues were with Sachs and not LUK from memory, but not certain. |
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| jimf909 |
Thu Nov 30, 2023 6:45 pm |
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I had no idea. I just assumed they were heavier.
Is this a three-phase bent spring DMF? It looks like it matches the wikipedia description:
https://en.wikipedia.org/wiki/Dual-mass_flywheel
Three-phase bent spring
This curved spring consists of an outer and two inner arc springs with different elastic characteristics connected in series. This category of bent spring uses the two concepts together: parallel and series connection in order to ensure optimal torsional compensation for each value of torque. |
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| Sodo |
Thu Nov 30, 2023 7:04 pm |
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syncroserge wrote: Exactly..they are suppose to fail in a way that gets you home i.e. the little plastic spacers
contact one another and allow it to be usable but it makes quite a ruckus !
Plastic fails?
Where in your pics - are the 'failed' components visible? |
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| AndyBees |
Thu Nov 30, 2023 7:58 pm |
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Syncroserge, thanks for your free time and sharing your work.
The DMF is a wear item just about like all the other components of a vehicle. As the miles roll up, the backward-forward "play" between the two halves increases. At what point a DMF begins to make noise, I have no clue.
I preemptively replaced the DMF in my 2000 Jetta at 291k miles while I was doing other major maintenance. It was not making any noise. The one in it now has about 100k miles on it and is quiet (my son owns it).
The DMF in my 03 Jetta TDI has over 275k miles on it. No noise.
I've changed a good number of them in TDIs and a couple in BMWs.. all were high mileage.
I installed a DMF in my 84 Vanagon with the ALH engine ....... no more rattling noise at idle in neutral and no more beating the hell out of the transmission. Shifting gears is very smooth. |
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| skills@eurocarsplus |
Thu Nov 30, 2023 8:17 pm |
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AndyBees wrote: Syncroserge, thanks for your free time and sharing your work.
The DMF is a wear item just about like all the other components of a vehicle. .
yes, thanks for cutting it open! I have seen them "windowed" in training sessions.
would also like to add... they are impossible to machine like a traditional flywheel. you can't stabilize the face to cut them
so basically, it's suicide to do a clutch and not replace the flywheel at the same time
and to derail things, because why not? check out this carnage.
kid took his parents S60R for a rip and wanted to know what happened when you went from 6th to 1st on the highway at 129 mph:
Sorry for the shitty pix....
the answer is you fucking destroy everything :lol:
that was a 13k bill. |
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