TDI DMF issues

[syncroserge]

Check out this link to my post of a dual mass autopsy for extra fun..

https://www.thesamba.com/vw/forum/viewtopic.php?p=10149267

[willyok]

I put about 50 miles on it today mixed city driving and 8 miles of stop and go traffic. Clutch feels really nice zero chatter and pretty light pedal feel.

As of right now I’m very pleased. I’ll update in regards to my warranty reimbursement

[willyok]

[AndyBees]

In my opinion, a DMF rules in a Vanagon with a TDI engine....... no question.

I started with the OE Diesel set-up. My engine, without a Tune, would slip the clutch easily.

Then, I installed a Single Mass Flywheel using a Vanagon Pilot Shaft and Clutch Disc. The Clutch Disc cracked somewhere before 20k miles.

Then, I installed a DMF .............. never looking back! Quiet, no slipping, no chatter, and smooth shifting.

For those reading this Thread, as may have already been stated, a DMF will only work with a "diesel" bell housing, OE or aftermarket available at Weddle.

Also, the Clutch Disc that comes with the DMF package doesn't have Springs. And, the clutch disc with springs from a SMF will not work in the DMF package (seems I may have already said this).
_________________
'84 Vanagon Tin-top, ALH TDI, two trips to Alaska, 2014 & 16. 1989 Tin-top unmolested.
1983 Air-cool, 225k miles, 180k miles mine, seven trips to Alaska from 1986 thru 2003. 1975 Bay hopeful.

[?Waldo?]

In my experience DMF clutch engagement is noticeably smoother than single-mass clutch engagement.

[dieseltdi]

I can speak from my experience not only driving TDI cars before and after DMF and my TDI conversion with and with out DMF. In the cars, it really smooths out the vibration of the TDI. Makes for a more pleasurable driving experience, not as much “shock” when you go through the gears and accelerate hard. In my TDI van, it was like night and day. I used to feel all the vibration through the shifter and through the sound of the engine. With the DMF, it is definitely smoother and a bit less loud.
_________________
When a clown moves into a palace he doesn’t become a king, the palace instead becomes a circus. — Turkish proverb

Those who will willingly sacrifice freedom for security, deserve neither.

Currently:
1982 Vanagon Westy TDI conversion with Coast Mt. Hightop - SKYE
2025 Hyundai Ioniq 6 EV
2015 Golf Sportwagen S TDI
Way too many previously owned to list!

[DanHoug]

a question to the DMF users... is chatter any more significant on a DMF? soft motor mounts, worn clutch shaft bushings, and driveline slop can lead to clutch chatter on engagement. i would imagine the engineers would have figured that out and not tolerated it in a production environment but it seems like it could lead to some funk on engagement.
_________________
-dan
60% of what you find on the internet is wrong, including this post.

'87 Westy & '89 Westy both 2.1 4spd

Past projects can be found at--
www.thefixitworkshop.com

[?Waldo?]

[Sodo]

OK thanks for that link.

So the gearbox side has "the slop" or free-rotation. OK I see how it puts the gearbox on a cushion. Does have it as much free rotation as the diagram depicts?

Having broken the springs on a 'normal' clutch disc I wonder if a DMF would help the gearbox to last longer with a big 4-cyl gas motor.
The massive low-end torque of those 2.7 GoWestys must beat real hard on a gearbox.
_________________


'90 Westy EJ25, NEW oil rings (!) 2Peloquins, 3knobs, SyncroShop pressure-oiled pinion-bearing & GT mainshaft, filtered, cooled gearbox.
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered original gearbox
....KTMs, GasGas, SPOT mtb

[?Waldo?]

The ring gear is mounted to the part of the dual-mass flywheel that is solidly bolted to the crankshaft. There is no slop between the ring gear and crankshaft. The added motion between the two masses occurs between the mass bolted to the crank and the mass on the side of the pressure plate/disc/transmission.

https://www.youtube.com/watch?v=ckf5fWGi5TU

[Sodo]

Did it have any back-and forth slop?
If yes, how many mm at the ring gear?

In my simple mind, a DMF can't have any slop.
But i don't actually know anything.
_________________


'90 Westy EJ25, NEW oil rings (!) 2Peloquins, 3knobs, SyncroShop pressure-oiled pinion-bearing & GT mainshaft, filtered, cooled gearbox.
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered original gearbox
....KTMs, GasGas, SPOT mtb

[willyok]

UPDATE

Ok, so I installed the replacement LUK DMF from Amazon and it works perfectly immediately.

I don’t know what happened to the first one but this one feels great.

Thanks for all the contributions. I’ll update once ID parts gets back to me regarding the warranty.

[tjet]

I've always used Sachs clutches and flywheels in my Jetta TDI. No Luk experience.

[willyok]

I downloaded the REPXPERT AP, and called them from the number on that. Provided them sole serial numbers rom the pressure plates and clutch discs and confirmed a couple stamps in specific locations.

Took about 5 minutes. The representative didn’t have a clear reason what caused my issues unfortunately but did say that based on freepoay and broken pins it is bad.

[DanHoug]

[willyok]

Ok so I spoke to LUK/Schaeffler. They are confident both DMF kits I have are Authentic regardless of the lack of QR codes.

I removed the non operational DMF and found that all the bolts attaching the pressure plate to the DMF were not “tight” and required very little fort to remove. I also found 2 of the three alignment dowels broken in the DMF. I marked the non functioning DMF click and measured the free play at 39mm. The new one has 5mm play


Im going to move forward with installing the replacement DMF and see what happens.

I’ll keep you posted.

Will

[willyok]

[Sodo]

Even 2-3 degrees sounds like too much.
I’m no expert, Just curious.
How many mm of slop if measured at the ring gear?
_________________


'90 Westy EJ25, NEW oil rings (!) 2Peloquins, 3knobs, SyncroShop pressure-oiled pinion-bearing & GT mainshaft, filtered, cooled gearbox.
'87 Tintop w 47k 53k, '12 SmallCar EJ25, cooled filtered original gearbox
....KTMs, GasGas, SPOT mtb

[AndyBees]

[DanHoug]