T

thrust-hq

New Member
I’m in the middle of changing the clutch on my 2003 disco but not sure if I need to replace the dual mass fly wheel as well. I’ve removed it and there is a lot of fine metal powder all around the centre of it on the rivet side. There is about 12mm of free play , I think this is normal but if I lever it with a short metal bar I can only get an addition 10mm rotation in one direction before it hits something solid within the flywheel, and approx 40mm in the other direction before the same happens. Does anyone know if this is about right or is a new (expensive) one needed. :(
Thanks
 
it needs replacing then which you should do anyhow really but i still ponder when i do them bearmach do one for about £260
 
Freeplay should be about 10-30mm but not using a bar to lever it! If it's hitting something solid it sounds like the radial springs inside the flywheel are knackered. I would change it as a matter of coarse if it is atall suspect. GSF carparts do one for about £250 if I remember correctly and it's an LUK original part.
 
The fine metal powder should be the give away that it needs replacing, hows the starter motor cos that normally collects all the cast iron powder and starts to play up
 
Starter motor is fine, think i caught the fault before futher damage was done, just waiting for the flywheel now. Whats the general opinion in the need to replace flywheel/engine bolts ?

thanks
 
thebiglad said:
I'm not sure, but don't they act like a cushion or shock absorber between the crankshaft and the gearbox input?
Click to expand...
Yes it will do that to a small extent (same as the springs in a centre plate on a conventional clutch do) the main reason for them is for NVH at idle only part of the flywheel mass is bolted to the crankshaft the other part and the clutch mass is on a bearing so effectively floats untill drive is taken up it then turns and hits its internal stops and transmits drive. I realy don't see the point myself but i don't design them i just fix em :D
 
if you have dual mass flywheel you dont have springs in clutch plate , when they get to the point of hitting stops there knackered,they are used nowadays as engine are higher torque and more effective damping to gearbox is needed to gearbox etc than coventional clutch,if you fit ordinary flywheel and clutch in replacement you get the old gear box knock at tickover
 
jamesmartin said:
if you have dual mass flywheel you dont have springs in clutch plate , when they get to the point of hitting stops there knackered,they are used nowadays as engine are higher torque and more effective damping to gearbox is needed to gearbox etc than coventional clutch,if you fit ordinary flywheel and clutch in replacement you get the old gear box knock at tickover
Click to expand...

Eggsackly what i said init:confused: duel mass flywheel is for NVH at idle

Said that anorl :doh:
 
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