DMF conversion to solid

stevehotshot · 9th November 2019, 15:21

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 · 9th November 2019, 15:33

Quote:

Originally Posted by 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...

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.

Number 6 · 9th November 2019, 17:37

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?

marinabrian · 9th November 2019, 18:31

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

sworks · 9th November 2019, 19:14

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

Comfortably Numb · 9th November 2019, 23:43

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.

COLVERT · 10th November 2019, 09:03

Quote:

Originally Posted by sworks

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.--

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

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.--

COLVERT · 10th November 2019, 16:58

Quote:

Originally Posted by 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

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

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

stevehotshot · 13th November 2019, 21:30

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..

Lovel · 10th November 2019, 08:49

Quote:

Originally Posted by 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...

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

9th November 2019, 15:21	#1
stevehotshot Regular poster Rover 75 Connoisseur SE tourer Join Date: Aug 2010 Location: Wrexham Posts: 86 Thanks: 14 Thanked 7 Times in 3 Posts	DMF conversion to solid 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...

9th November 2019, 17:37	#3
Number 6 This is my second home Rover 75 tourer Club CD/Limo Tints Join Date: Nov 2008 Location: Meneac Posts: 6,759 Thanks: 5,007 Thanked 1,609 Times in 869 Posts	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? __________________ ] "I started out with nothing, and Ive still got most of it left!"

9th November 2019, 19:14	#5
sworks Been absent for a while… Rover 75 Tourer, Classic mini Cooper S, Abarth 595 competizione, MG TF and a Hyundai Tucson PHEV Join Date: Feb 2007 Location: Cumbria Posts: 13,065 Thanks: 1,033 Thanked 1,686 Times in 1,040 Posts	As Brian says, solid flywheels generally create vibrations that can transmit to the crank. Stick with a DMF __________________ ................................................. 'Marmite' Possibly one of the most famous 75 tourers produced! left the production line as the last of only Three Rover 75 tourers produced in Trophy Yellow. 48 hours later Longbridge closed. The last sold ordered 75 Tourer. Paid for by the Phoenix Four and handed over by John Towers to the Warwickshire Northampton Air ambulance service as a Rapid Response vehicle

9th November 2019, 18:31	#4
marinabrian MG ZT Join Date: Jan 2011 Location: Newcastle Upon Tyne Posts: 20,151 Thanks: 3,565 Thanked 10,837 Times in 5,718 Posts	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

9th November 2019, 23:43	#6
Comfortably Numb Posted a thing or two Rover 75 Saloon Join Date: Dec 2017 Location: Penrith Posts: 1,336 Thanks: 165 Thanked 303 Times in 241 Posts	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.

13th November 2019, 21:30	#9
stevehotshot Regular poster Rover 75 Connoisseur SE tourer Join Date: Aug 2010 Location: Wrexham Posts: 86 Thanks: 14 Thanked 7 Times in 3 Posts	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..