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Dual Mass Flywheel uncovered

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gregozedobe View Drop Down
Vanorak
Vanorak


Joined: 22 Dec 06
Location: Canberra, Oz
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gregozedobe Quote  Post ReplyReply Direct Link To This Post Posted: 26 Apr 16 at 03:19
Good news ! (apart from the expense of course).
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festa View Drop Down
Groupie
Groupie


Joined: 23 Dec 11
Location: maidstone
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Points: 100
Post Options Post Options   Thanks (0) Thanks(0)   Quote festa Quote  Post ReplyReply Direct Link To This Post Posted: 30 Sep 17 at 08:42
I know this hasn't been added to for over a year now but I've changed from the Lux dmf over to the sachs dmf for the reason of the blocks in the sachs dmf reducing coil binding because of the shorter springs. I did cut open my original Lux dmf and found the the longer springs had coil bound and had snapped in various places
I did notice however that the Sachs dmf feels much heavier that the Lux and that possibly is a good thing for a diesel engine to keep momentum and try to smooth out the firing pulses, being mine is a 5 pot engine. However the Sachs dmf was pulled from the engine after around 4000 miles due to the engine needing a rebuild and I decided that I would get the bottom end balamced. In doing this it became apparent that the balancing would not be able to be done with this Sachs dmf due to the amount of wear within a short time frame. Another Sachs dmf was purchased and was balanced in it's own right and fitted to the engine, Not sure of the tolerance that the manufacturers use but it was out but not sure on the percentage, I now have a fully balanced bottom end....Yes I know the mass changes when the rpm goes up but you have to start somewhere.
This now brings me to my latest dilemma...
Sachs uprated cover plate with a Sachs 4 puk paddle clutch and the Sachs dmf that's been fitted has now failed Cry
The Sachs dmf has seperated as the starter ring which is attached to the engine in stationary and the rest of the clutch assembley including the center of the dmf where the cover plate fixes to spins around in itself (engine stationary and gearbox in sixth, one wheel on ground, spin the other wheel to see things moving).
It appears that the stops of the dmf has failed in a very short time frame of less than 2000 miles, apart from a grinding noise and a jump in the van when on the motorway the other night I was up in sixth at around 75mph ( indicated speed) the engine stalled itself.
On investigation the next morning the engine is still jammed solid and can't be moved clockwise or anti-clockwise so all I can assume at the moment is that fragments of the dmf( whatever parts) have become wedged somewhere in the bell housing. I'm hoping it hasn't done any damage to the back of the engine or gearbox bell housing. All the inspection for the moment has been done through the starter hole in the gearbox and it means the engine has to be dropped again for the third time this year.
I will report back in but I think the best dmf imo is the oe Lux for the time being.
black lwb 174,forge intercooler,balanced bottom end, GT2260v turbo 2.1bar boost with pp full 76mm decat,itg filter 440ft lbs@288bhp
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gregozedobe View Drop Down
Vanorak
Vanorak


Joined: 22 Dec 06
Location: Canberra, Oz
Status: Offline
Points: -998490
Post Options Post Options   Thanks (0) Thanks(0)   Quote gregozedobe Quote  Post ReplyReply Direct Link To This Post Posted: 30 Sep 17 at 13:17
Sorry to hear of the troubles you've been having  Dead, but thanks for the useful info on T5 DMFs.  Thumbs Up
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festa View Drop Down
Groupie
Groupie


Joined: 23 Dec 11
Location: maidstone
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Post Options Post Options   Thanks (0) Thanks(0)   Quote festa Quote  Post ReplyReply Direct Link To This Post Posted: 01 Oct 17 at 09:56
Was going to start stripping the van today until I looked outside...roll on summer but I've got to get on with it. Don't want to take the subframe off but it maybe easier? there's not alot of room that side with a five pot and I haven't got a ramp.
I've also done two engine rebuilds this year on the same engine hense why I don't really want to take it out again. I also have know idea how much power is going through this dmf as I haven't had the van running long enough to get it on a dyno, each time it's stripped I bed it back in and then take it to the mappers but this time it has only lasted 880 miles since the second rebuild and 1hr 40 mins since I replaced the turbo to manifold gasket that was holding the power back. I can't cut this sachs dmf open either as it's got to go back but I really want to see what has failed.
I'm not sure if the paddle is a bit fierce as it does grip well being a ceramic....can't use a single mineral as it doesn't take long before it starts slipping and can't find anyone to do a smf with twin disc. Don't know anyone who has fitted a smf to a 5 pot pd engine to see how long the gearbox will last, the only bonus is that it has been balanced better over oe and hope that's enough to reduce the harmonic's.
How do we post picture's on here? does this site host? or is it third party?
black lwb 174,forge intercooler,balanced bottom end, GT2260v turbo 2.1bar boost with pp full 76mm decat,itg filter 440ft lbs@288bhp
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festa View Drop Down
Groupie
Groupie


Joined: 23 Dec 11
Location: maidstone
Status: Offline
Points: 100
Post Options Post Options   Thanks (0) Thanks(0)   Quote festa Quote  Post ReplyReply Direct Link To This Post Posted: 05 Oct 17 at 06:43
It now appears the dmf has seperated and the rivets that hold the halfs together have sheared off. Thats because the caste liners that have been fitted has failed and the piston has got stuck at the top, basically the engine has stopped suddenly by throwing number 4 rodAngry
black lwb 174,forge intercooler,balanced bottom end, GT2260v turbo 2.1bar boost with pp full 76mm decat,itg filter 440ft lbs@288bhp
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