DMF conversion to solid

[stevehotshot]

Hi everyone, has anyone had experience of driving rover cdt after converting to a solid flywheel... I expect my clutch to start slipping within the next 6 months due to the mileage, and on researching prices, there is £200-300 difference in the complete kits of DMF and solid...? If there is a discernable lack of smoothness with the solid flywheel then I would proceed with the DMF... many thanks for any advice...

[clf]

Hi everyone, has anyone had experience of driving rover cdt after converting to a solid flywheel... I expect my clutch to start slipping within the next 6 months due to the mileage, and on researching prices, there is £200-300 difference in the complete kits of DMF and solid...? If there is a discernable lack of smoothness with the solid flywheel then I would proceed with the DMF... many thanks for any advice...

Why are you replacing the DMF? General consensus seems to suggest this is unnecessary for most people.

Apparently though it is a bad idea to replace the dmf with a smf. I have no experience other than what I have read, so cannot give a reason why from experience, but imagine that vibration would be greatly increased, which could lead to reducing the life of other components. A search of the forum will yield lots of responses (and arguments lol) about it. (https://cse.google.com/cse?cx=013872775456170867447:b0a0nngh8ce&q=single%20sual%20mass&oq=single%20sual%20mass&gs_l=partner-generic.3...36981.42465.0.42878.16.16.0.0.0.0.111. 1394.14j2.16.0.gsnos%2Cn%3D13...0.5453j8498985j16. ..1.34.partner-generic..16.0.0.vZ1TMtMh4lo)

[Number 6]

Ask your self a few simple questions,

1 Why was the car fitted with a DMF from the factory

2 How much research did Rover do to decide to fit a DMF

2 And why fit a more expensive unit If a Solid Flywheel would do?

:shrug::shrug::shrug::shrug:

[marinabrian]

They are harsh, heavy and unpleasant to use.

It also carried the risk of snapping the crankshaft, I've encountered three diesels with snapped crankshafts, all of which were fitted with single mass flywheel conversions.

I will allow you to draw your own conclusions from that ;)

Brian :D

[sworks]

As Brian says, solid flywheels generally create vibrations that can transmit to the crank. Stick with a DMF

[Comfortably Numb]

Interestingly, the original friction plate on my CDT, did not have rotational damper springs, so relying entirely on the DMF to take the shock out of a "dropped" clutch.

[Lovel]

Hi everyone, has anyone had experience of driving rover cdt after converting to a solid flywheel... I expect my clutch to start slipping within the next 6 months due to the mileage, and on researching prices, there is £200-300 difference in the complete kits of DMF and solid...? If there is a discernable lack of smoothness with the solid flywheel then I would proceed with the DMF... many thanks for any advice...

Now Steve, she had one careful owner before your tenure up to 100k miles who was light on the clutch, :} so why would it start slipping all of a sudden?

Don’t go down the path of a solid flywheel to save a few quid it does not make sense

[Mike Noc]

Far more often it is the hydraulics that fail way before the clutch plate wears thin - the old clutch out of my 75 was well within the service limits when the gearbox was off to replace the slave cylinder, and is now installed in my Freelander when the slave went on that.


As for needing a new DMF, I have had one on long term test which has now covered over 400k miles, so hopefully there should be plenty of life left in yours Steve. :}


Easy enough to test for raidal and axial play once the box is off to check the condition of your DMF and decide whether it needs replacing or not.


Personally, on this engine, I wouldn't go down the single mass flywheel route, unless I was marinising it.






.

[COLVERT]

As Brian says, solid flywheels generally create vibrations that can transmit to the crank. Stick with a DMF

I'm sure it's not vibrations as every other car with a solid flywheel would vibrate.--:duh:

A flywheel is designed to take the vibrations OUT not put them IN.----:D

The Rover crank is designed with the flywheel it has to reduce crank loading due to the damping effect of the dual mass flywheel. Without it the crank is exposed to loads it was not designed to take.--:eek::eek:

[COLVERT]

They are harsh, heavy and unpleasant to use.

It also carried the risk of snapping the crankshaft, I've encountered three diesels with snapped crankshafts, all of which were fitted with single mass flywheel conversions.

I will allow you to draw your own conclusions from that ;)

Brian :D

One of the conclusions that was drawn was that they create Vibrations. ?????

Other folks conclusions are not quite the same as yours methinks. --Lol.

[sworks]

I'm sure it's not vibrations as every other car with a solid flywheel would vibrate.--:duh:

A flywheel is designed to take the vibrations OUT not put them IN.----:D

The Rover crank is designed with the flywheel it has to reduce crank loading due to the damping effect of the dual mass flywheel. Without it the crank is exposed to loads it was not designed to take.--:eek::eek:

They are either designed to have a dmf of not, two different systems. If it’s designed as single mass then they obviously work well. Fitting a single mass conversion can make the car unpleasant to drive regardless of the flywheels job. Just an opinion based on my very limited knowledge and experiance, I’m certainly no expert

[stevehotshot]

Hi, a previous cdt I had developed clutch slip after 112k, having pulled a caravan a dozen or so times, I fitted clutch and the rotational "play" was just within tolerances, so left it in... With this car I'm expecting clutch to go, because car has now covered 121k and was fitted with a towbar when I bought it 2 years ago. On top of that clutch pedal was heavier than I was used to, and a 160 remap, led me to assume the clutch wouldn't last as long. However 2 years later, with the addition of a "Ron" type box, I now have plenty of low range torque which is just too much fun to ignore.. All these things tell me that a clutch replacement is inevitable at some stage. The DMF question arose from the previous one that I just-got-away-with.. I hope not to have to fit one, and as I alluded to in original question, wouldn't fit Solid if general consensus was a no no.... Thanks all.. Long may we rove..