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Discussion Starter · #1 ·
The car accelerates and shifts like normal when driving like an "old lady". But when I attempt to punch it anymore than quarter throttle the revs spike and the acceleration does not match. It feels as if i am still feathering the clutch when my left foot is completely off the pedal. As I let up a bit on the gas pedal the engine seems to catch up with the rpms. It even struggles at times on medium sized hills with the same issue. There is no clunking or weird sounds when shifting gears. I always have fixed my general car issues on my own but this is way over my head. Just hoping that someone can help me out with a little bit of knowledge or set me in the right direction. It's parked until i can figure out the remedy because I worry that if I continue to drive it in it's current condition it may damage other components of the vehicle. PLEASE HELP!
 

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Sounds like your clutch is worn out. How many miles on it?

Verify that the clutch delay valve has been removed. The valve is designed to slow down the clutch engagement. It can momentarily allow the clutch to slip.
 

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Discussion Starter · #3 ·
The car has 130,000 miles on it. I am the second owner, the original owner gave me a binder full of 14 years worth of Certified BMW service documents when purchased. I highly doubt he would have had anything stock removed from the car by them. Is there an easy way to check to see if the "clutch delay valve" has been removed though? I assume the clutch is worn out, but im just researching if the problem might be something else before i take it to a transmission specialist. Trying to avoid getting the run around from them and ending up replacing multiple unnecessary additional parts. My budget is really tight right now and my daily driver is starting to go so i really need to get it fixed as soon as possible.
 

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The car has 130,000 miles on it. I am the second owner, the original owner gave me a binder full of 14 years worth of Certified BMW service documents when purchased. I highly doubt he would have had anything stock removed from the car by them. Is there an easy way to check to see if the "clutch delay valve" has been removed though? I assume the clutch is worn out, but im just researching if the problem might be something else before i take it to a transmission specialist. Trying to avoid getting the run around from them and ending up replacing multiple unnecessary additional parts. My budget is really tight right now and my daily driver is starting to go so i really need to get it fixed as soon as possible.
Sounds like it's the clutch. I doubt the CDV has anything to do with it. Especially if it's still the original clutch.

dave
03 540i6
 

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The CDV is between the slave cylinder and the hydraulic line. It's a small cylinder, not much bigger than the fitting.

However, I must side with 540nj. THe CDV does contribute to accelerated clutch wear, esp with aggressive driving. I removed mine at 58k, and, now, at 148k, no signs of slippage.

If you do get the clutch replaced, best to find a BMW specialist.
 

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Please double check if it is not engine misfire. The symptoms of engine misfire can be misdiagnosed as clutch slip.

When my 540i had misfire issues, the car would shake at higher gear and at low RPM for a sec. But not at high RPM. I believe the extra fuel causes the misfire at low RPM and 6th gear. However, for a while, I thought my clutch slips at 6th gear.
 

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The car accelerates and shifts like normal when driving like an "old lady". But when I attempt to punch it anymore than quarter throttle the revs spike and the acceleration does not match. PLEASE HELP!
Clutch slip. You'll need to replace your clutch and flywheel (it's best to replace it at the same time) You can continue driving the car, you're not going to break anything that's not already broken.
 

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Please double check if it is not engine misfire. The symptoms of engine misfire can be misdiagnosed as clutch slip.

When my 540i had misfire issues, the car would shake at higher gear and at low RPM for a sec. But not at high RPM. I believe the extra fuel causes the misfire at low RPM and 6th gear. However, for a while, I thought my clutch slips at 6th gear.
It's not a misfire if his engine rpm is increasing quickly without corresponding acceleration as he describes. A misfire would be a stumble and the engine rpm would remain steady or drop.
 

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Uh.. Did you say "yuuts"?
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Just out of curiosity: Anyone who has done this... how much are we looking at roughly? I don't need the work "yet", but at 154,000 I'm assuming it could potentially be in my future.
 

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The CDV is between the slave cylinder and the hydraulic line. It's a small cylinder, not much bigger than the fitting.

However, I must side with 540nj. THe CDV does contribute to accelerated clutch wear, esp with aggressive driving. I removed mine at 58k, and, now, at 148k, no signs of slippage.

If you do get the clutch replaced, best to find a BMW specialist.
Still on my original clutch at 125K, never removed CDV, though I got a drilled one to replace it when I do someday!

dave
03 540i6
 

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clutch

the longer you drive it the more likely you are going to damage the dmf (dual mass flywheel) the most expensive component of the clutch. In other words you'll go frm $250 in parts to $800 in parts...

Don't be a schmuck replace the clutch before you smoke the dmf too!

For the record I've got 170K on my original clutch and am changing mine Saturday...
 

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the longer you drive it the more likely you are going to damage the dmf (dual mass flywheel) the most expensive component of the clutch. In other words you'll go frm $250 in parts to $800 in parts...

Don't be a schmuck replace the clutch before you smoke the dmf too!

For the record I've got 170K on my original clutch and am changing mine Saturday...
Rockauto shows DMF to be $417. Cheap enough that it's probably best to change it if you are paying for the labor and want to keep the car (it's a different story if you are doing the work DIY, or planning to sell).
 
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