Testing clutch

Re: anyone heard about how they test the clutches

DrewT said:

according to my SA they "pop the clutch" at a standstill in third and if the car stalls the clutch is fine!!!!!!!!! hmmm

does this make sense to anyone?

anyone else have a bad fuel gauge?

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whatever they did to test it...

Clutch and Flywheel replaced at 28k miles. Seems like a major expense to replace the flywheel at this mileage but who is complaining.

Re: anyone heard about how they test the clutches

Maintenance or warranty coverage?

Any hassles?

Nice-

Re: anyone heard about how they test the clutches

ard said:

Maintenance or warranty coverage?

Any hassles?

Nice-

Click to expand...

Not sure about what warranty is was replaced under cause the car is still covered under the original.

No hassle at all, was actually kind of mad that they didn't call and tell me they were doing the work cause there was other stuff i would have liked them to do. Front sway bar, rear seal, etc.

Still having trouble understanding why the whole thing got replaced, it really wasn't that bad just under hard acceleration in 1-2-3, wasn't slipping when I nailed it in higher gears.

What are the break in procedures for a new clutch? :M5launch:

Re: anyone heard about how they test the clutches

For the clutch brake-in procedure, have a look at post #7 in this thread:

http://www.m5board.com/vbulletin/showthread.php?t=54906

David

Re: anyone heard about how they test the clutches

Putting it in 3rd and popping the clutch would work, but one of the better ways is the ebrake trick. You need to have a working ebrake for this to work, which is something that not all E39's have sadly.
Pull the ebrake up fully, and then try to start the car normally. Usual amount of gas, usual amount of clutch. DOnt fight the ebrake, but rather see if the engine will stall. If the engine stalls against the ebrake, then the clutch is good. If the clutch slips and the car doesnt move, then the clutch is bad. Just remember not to go all out, just try to drive it how you normally would (>1000rpms on the launch, no dumping or riding the clutch).
That has been the trick that has worked out the best for me.
:cheers:

E-brake Test

I do the E-Brake method:

1. Pull the E-Brake as tight as possible.
2. Start the car.
3. Put the car is second grear and then put 2000 RPM on the tach.
4. Drop the clutch.
5. If car dies and stays put, the clutch and e-brake are working!
6. If car keeps running and car stays put, e-brake is working.....clutch is slipping.

Re: anyone heard about how they test the clutches

I had a thread recently that resulted in clutch replacement. Good info in the thread. Title was something like "can anyone diagnose this? Clutch issue?"

One of the tests suggested was a hard 1-2 shift with the DSC off. No chirp of the tires = bad clutch. In my case the engine just slowly made it's way down to the 2nd gear RPM. No chirp, etc. I also had a hard to repeat problem where a hard 1-2 shift would cause the clutch to break away (read engine slowly sweeping up in RPM but the car was decelerating.)

Dealer rode around the block with me and said clutch was toast.

Re: anyone heard about how they test the clutches

I had a thread recently that resulted in clutch replacement. Good info in the thread. Title was something like "can anyone diagnose this? Clutch issue?"

One of the tests suggested was a hard 1-2 shift with the DSC off. No chirp of the tires = bad clutch. In my case the engine just slowly made it's way down to the 2nd gear RPM. No chirp, etc. I also had a hard to repeat problem where a hard 1-2 shift would cause the clutch to break away (read engine slowly sweeping up in RPM but the car was decelerating.)

Dealer rode around the block with me and said clutch was toast.

Re: anyone heard about how they test the clutches

tech said flywheel was badly burned. Unbelievable difference. Also told "there is no break in period" just drive it.

Clutch run-in procedure

DrewT said:

tech said flywheel was badly burned. Unbelievable difference. Also told "there is no break in period" just drive it.

Click to expand...

Total, complete BS!

See my previous post in this thread.

Have the incompetent and/or lying tech read BMW TIS RA 2100, Run-in procedure for SAC. (SAC = self adjusting clutch)

David