Hello !
I have a 2003 2.0 110 HDi estate. Its done around 54K milage. I can hear what sounds like a squeaking almost pinking sound as the engine revs up and down, but only only quite light throttle ie when just feathering the throttle to keep speed held below the limit when appraoching a speed camera Usual moderate acceleration its disappears The sound is loudest when turning off the engine. I have checked around with a pipe to my ear while a mate was blipping the throttle and it sounds to me like its from the flywheel area. It deffo not any of the engine or top exhaust mounts clamps. Turbo sounds fine power fine etc. EGR valve seems to be ok too when I put the pipe to it.
Initially I thought it may have been one of the tensioner pulleys hence my recent cambelt change. It was a real bugger to track down the area where the sound was coming from but its loudest when I touch the sounding pipe near the starter motor area of the bellhousing. Clutch works fine, smooth with no slipping that I have noticed and its at the usual height for a 406 based on my experience of this and my old 2.1TD 406.
Anyways my real question is ...what are the usual symptoms of a knackered dual mass flywheel and what happens when one fails?
Any info greatly appreciated
Al
change from 2nd gear at 30mph to 5th gear and if you hear a squeal while putting the foot on the throttle when 5th is engaged, you have a flywheel issue.
2000 D9 Coupé 2.0 SE EW10J4 Scarlet Red - 5 litres of oil gone in 500 miles!!! Time for a new coupe me thinks
A worn DMF will churp/squeek when you first start up the motor and then when coming on/off the clutch in fact you can make it squeek by bringing the clutch in sharpish and off again.
Low speed on/off the throttle can also make it churp as well.
Mine was like this for 3 years, also it would judder if you weren't easy on the action and it would occasionaly slip too when it got hot enough on a long journey.
I wouldn't worry too much about it, my bet is that 90% of 110's out there have a knackered DMF
Actually thinking about it there was a guy on here once where his DMF actually broke up and the symptoms were a very lumpy idle (out of balance) shortly followed by a terrifying noise (bits castching the bell housing) swiftly followed by a locked up clutch etc.
Cars in my care:
2021 Kia Spottage 1.6 Pez Turbo Dual Clutch Gearbox Trickery
2013 Renner Twingo - donkey work
Mine chirrups/squeaks on starting and switching off. Also you can get it to do it if you blip the throttle gently at tickover.
As Welly says, leave well alone till it needs doing, my 110 hdi has done 126k on the original clutch (despite the cars previous owner being a caravanner!!!) and mine will be left till it fails.
Its the only thing stopping me having the car re-mapped at the moment.
My last car (Skoda Octavia TDI 110 - remapped to 145bhp) killed the dual mass flywheel very quickly, most noticable by a heavy vibration under load in the higher gears. When we dropped the flywheel and clutch out the two plates of the flyweel had about 2" of oposing travel in them!
legoless wrote:Cheers guys.
Is there any reason for a DMF as opposed to a "normal" solid jobby?
Yes, each downstroke of a Diesel engine's pistons is pretty powerfull and solid (more torque) and creates a kinda roughness to the rotation of the flywheel so the 'damped' flywheel absorbs this giving the driver a smooth uptake of the drive train.
I thank yaw
Having said all that many are 'converting' to solid jobbies with no real issues.
Cars in my care:
2021 Kia Spottage 1.6 Pez Turbo Dual Clutch Gearbox Trickery
2013 Renner Twingo - donkey work
legoless wrote:Cheers guys.
Is there any reason for a DMF as opposed to a "normal" solid jobby?
Yes, each downstroke of a Diesel engine's pistons is pretty powerfull and solid (more torque) and creates a kinda roughness to the rotation of the flywheel so the 'damped' flywheel absorbs this giving the driver a smooth uptake of the drive train.
I thank yaw
Having said all that many are 'converting' to solid jobbies with no real issues.
My advice is spend the money on the OE dual mass if it needs replacing. My experience with the skoda when i replaced the dual mass with a conventional flywheel and sprung clutch plate was not a sucess.
Contant underlying vibrations were present, me being a fussy sod couldnt live with that, mind you it was half the price of a DMF and clutch so you pays your money you takes your choice i suppose?
dogslife wrote:The pikeys generally weld them up on their transits, I'm told...
It'd be very very difficult to drive smoothly afterwards though!
The clutchplate on a DMF is a fixed (ie non sprung one) as the DMF takes the shock loads.
When you convert to a soild flywheel, the new clutch plate is a sprung variety, otherwise it would be very on/off in its operation, a bit like a paddle clutch.
Usual moderate acceleration its disappears The sound is loudest when turning off the engine. I have checked around with a pipe to my ear while a mate was blipping the throttle and it sounds to me like its from the flywheel area. It deffo not any of the engine or top exhaust mounts clamps. Turbo sounds fine power fine etc. EGR valve seems to be ok too when I put the pipe to it. 
