clutch slip on clk230 komp manual

[Cardiff Greg]

I noticed what seemed like clutch slip when I floored my w208 clk230 komp at 2800revs in top gear. The revs went up to about 3200 then seamed to drop back as the car speed increased. The car has 115k miles on the clock. I later tried a VERY steep hill start without any problem or slip.
My garage quote me £450 for the clutch replacement then tell me there is something else that should be changed that costs £500 extra
:???:



Can anyone help or has anyone had a similar experience.

Cardiff Greg

 

[television]

I would have thought that going up a steep hill would have shown any clutch slip up, there is only the clutch plate and release bearings that are changed, the hydraulics are all separate things, so I do not know what the dealer meant

I do not think that clutch slip could be seen at 2,800 in top, but I could be wrong

 

[Uncle Benz]

Dual mass flywheel??

 

[television]

Dual mass flywheel??

Thank you Uncle benz

 

[Jay Gee]

Oh dear,Ithought that was a Ford specific problem.So MBs have them as well then.I'm afraid that all I know about them are that they exist and are to be viewed with extreme caution.Any further explanation would be most welcome by myself and'I suspect, Cardiff Greg.

 

[television]

I will take a look on WIS now we have this new info and see what it says and post back

 

[television]

Nothing yet about the flywheel.

Clutch pressure plate. is the only thing mentioned for slip, and one sands up the flywheel face to remove any glaze.

Another thing but not sure if it fits.
Clutch impact or wind up effect after actuating clutch in lower gears,, there are modified side shafts for this, this is with the 716 gear box.

No mention of any flywheel checks found,, just every day clutch and pressure plate,, when slipping it says change pressure plate only

 

[Uncle Benz]

http://www.buypartsby.co.uk/dual-mass-flywheel-details.php?recordID=751

Not as expensive as you might have expected...

 

[roofless]

had a search & only got vw audi ect zero for mb

 

[television]

http://www.buypartsby.co.uk/dual-mass-flywheel-details.php?recordID=751

Not as expensive as you might have expected...

Does the face go under tolerance when worn

 

[Uncle Benz]

When changing a clutch, you are supposed to measure the rotational free play between the two parts of the flywheel. The specs vary, but more than about 20mm at the edge is too much. In extreme cases the two parts can slip, giving a feel like a slipping clutch, but which tends to not be repeatable on throttle application as a normal slipping clutch would.

Don't know if that makes sense...

Actual wear of the friction face is no more than a standard flywheel.

They contain some sort of viscous silicone fluid. in extreme failure cases I have seen this liberally spread around the bellhousing. Looks like very thick CV grease, but much harder to remove from your hands...

 

[television]

Thank you again and now all clear, and this would fit with the original post

 

[roofless]

had a search & only got vw audi ect zero for mb

MUST TRY HARDER :Oops:

 

[roofless]

found this http://uk.youtube.com/watch?v=YnaXB8q3uzQ

 

[television]

found this http://uk.youtube.com/watch?v=YnaXB8q3uzQ

Thanks roofless,, this is making a good night tonight

 

[roofless]

Thanks roofless,, this is making a good night tonight

last night i was on till 10.30 & i think i had one post

 

[Mr Teddy Bear]

I'm sure to be corrected if I'm wrong but that is surely just an over engineered spring loaded centre plate boss??

 

[Uncle Benz]

No, you are pretty much spot on. They have moved the springs from the clutch plate to the flywheel, and all in the name of progress...

Like moving the slave cylinder from the side of the gearbox to around the input shaft. Crazy!!!

They don't show it in the animation, but there is fluid in there too to damp the oscillations of the springs. (they might do, it may be that red bit that flashes up around the outside)

 

[Jay Gee]

found this http://uk.youtube.com/watch?v=YnaXB8q3uzQ

Very useful.Thank you.Seems to be a case of 'If it ain't broken,fix it 'till it is',though.

 

[Cardiff Greg]

I have found a local clutch specialist (via the chap who services my 190 and 230clk and is too old to do the job these days) who explained as follows.

Normally when you engage the clutch, the trust bearing pushes the fingers on the pressure plate. This relieses the load off one side of the clutch plate. The difference in speed and load of the two parts seperates the second side of the clutch plate.

Hence the clutch is disengaged.

The design of the clutch did not changed much for many years other than the improvement in materials.

The Dual mass flywheel's job is to seperate the other side of the clutch plate at the same time by retracting. Thus giving a smoother gear change and reducing the load on the gears. This has, and is being fitted to most new cars of every type.

The so called MB specialist tried to feed me a load of bull .........

The clutch is being stripped on tuesday by the clutch specialist and he will let me know what parts need changing and why.

MB van clutches are known to last as little as 85k. My 190 has done 240k with the same clutch.

His quote is one hour longer that th MB and parts are about 1/2 the costs.

Thank you everyone for your imput and I will keep you updated as thing progress.

Greg