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[gazsomega]

thurst bearing
well i have a 2.5 diesel and somtimes when i press the clutch it will sound like a thurst bearing yet other times you hear nothing but when it gets on a warm day and i lift the clutch up or depress it ther is a rattling sensation coming threw the pedal as if somthing is lose can anyone help or tell me if it is the clutch how bid of a job it is
cheers

[Omegatoy]

oh dear!!! dmf is knackered mate do not buy a second hand one unless A, you know the guy selling it and trust him,
or B you can test drive the car its on to ensure it is not the same as your current one!!
Omegatoy

[Bandit127]

It does sound like the thrust bearing. The will go for a while, getting gradually worse. Eventually complete break up of the bearing will:
Rob you of the cutch pedal.
Knacker the pressure plate.

I haven't done an Omega but rear wheel drive priciple should still apply:-
Basically, the gearbox has to split from the engine. Usually this is:
Remove starter motor.
Remove gear stick.
Disconnect clutch mechanism (cable or hydraulic).
Disconnect prop shaft and drop out of the way.
Undo gearbox mounting.
Undo bell housing bolts.
Drop gearbox out of the way. (Use a trolley jack)
Remove sh*gged thrust bearing - wonder at how it still did it's job in such a state.
You might as well replace the pressure and friction plates while you are in there - then you will have a whole new clutch.

Reverse the instructions for re-assembly.

It's a fairly big  job and it's nearly all done from underneath the car but it's worth doing and it should then be good for another 100,000 miles.

The last one I did was on a Volvo S40 and that was a frgging nightmare - transverse encine and no room to do anything. RWD has other benefits...

[gazsomega]

sorry bit new can you tell me what dmf is short for so i may be right it is the bearing i would change the clutch anyway if im striping it all apart then why not.ive only done a clutch on a front wheel drive car before so rwd is new to me but it seems pritty much the same looks like i may need to borrow a pit ive not priced up someone to do it yet but i carnt see it being a few hundred quid

[markey mark]

dual mass flywheel ! bout £450 from vaux the last second hand one i sold was £50 ! if you can find one bud ! :-?

[Bandit127]

http://moodle.student.cnwl.ac.uk/moodledata_shared/cdx%20etextbook/dswmedia/trans/clutchMan/clutches/dualmassflywheels.html

The S40 I did didn't rattle much - but the vibration through the pedal was obvious. And the thrust bearing was well and truly sh*gged.

Never had trouble with a DMF so I defer to the superior experience of the posters above.

[gazsomega]

well i do get a bit of vibration threw my gear lever more than my other car yet my other car is only two years old so i though this was just the age of the car as it is 8 years old corect me if im wrong both your help is great just unsure what to do and dont fancy paying 450 im just going to ave a shop round on the net see if i can see any

[gazsomega]

well just had a brief look and saw a few dmf around 200 and clutch kits at 60 just how easy is the dmf to change ill give the cluctch ago as its my second but its the first time ive heard of a dmf

[philhoward]

Dual Mass Flywheels are a relatively new thing - about the last 10-15 years.  Whereas you used to have springs in the middle of the friction plate to dampen out any vibrations, they have been moved into the flywheel.  Apparently allows for a lighter clutch, hence their use.  Sadly, they tend to fail not long after the standard fleet mileages, so the cost is passed onto Joe Public (i.e. us).

On some cars, they can be replaced with an earlier setup (solid flywheel and "conventional clutch").  Not sure if this is the case with the BMW lump?

[gazsomega]

i think id rather replace it with the same just to save confusion as i will be doing it myself or at least i hope

[gazsomega]

well ive decided to change them all dmf and hole clutch just got to buy them but need to buy the carpet first to keep the missis happy