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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Fri, Apr-13-2018, 07:39:02 PM   #1
maynard423
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Default Clutch Woes

Ok...OE clutch went out at 81k. The disc shattered. I bought the DKM replacement that ECS sells. This comes with a steel, lighter single mass flywheel and a sprung clutch. Fly wheel is exactly 2 lbs lighter than the OE DM. Install went great with no issues. I bought an OE pilot bearing, OE Sachs TOB (You could see where the BMW had been dremeled off), brass pivot pin and and new clutch fork/spring. A new OE slave cylinder was installed as well with brand new ATE fluid.

Initial startup was flawless. Goes smoothly into first,second and third under 2800 rpm. After 2800 when depressing the clutch and changing gears I can a feel vibration, pulse. Almost like a rotational force. Itís so hard to explain what I feel and put it into words. This happens with all gears.

At idle, with the clutch pressed nothing happens at all. If I press the throttle past 2800 the pedal vibration, pulse appears. Iím pretty much at a loss here. Any suggestions would be great.




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Old Fri, Apr-13-2018, 09:21:13 PM   #2
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Default Re: Clutch Woes

Vibration through the clutch pedal?
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Old Fri, Apr-13-2018, 09:54:54 PM   #3
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Default Re: Clutch Woes

Yes. At the very bottom of travel.


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Old Fri, Apr-13-2018, 10:20:27 PM   #4
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Default Re: Clutch Woes

Does it happen in neutral if you press the clutch and rev the engine up to 5 or 6k? Or does it only happen in a gear or if the car is moving?

If it happens sitting still in neutral i would say it’s the clutch or FW out of balance and you just can’t feel it at low rpms.
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Old Fri, Apr-13-2018, 10:25:16 PM   #5
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Default Re: Clutch Woes

On my old m3 if I rested my foot on the clutch it would vibrate a little. Nothing ever happened to it. Clutch is probably just slightly out of balance.
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Old Sat, Apr-14-2018, 01:03:26 AM   #6
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Default Re: Clutch Woes

Quote:
Originally Posted by Ramp1 View Post
Does it happen in neutral if you press the clutch and rev the engine up to 5 or 6k? Or does it only happen in a gear or if the car is moving?

If it happens sitting still in neutral i would say itís the clutch or FW out of balance and you just canít feel it at low rpms.


It happens in neutral with the clutch pressed and RPMs above 2800. Itís happens when shifting with RPMS above 2800.


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Old Sat, Apr-14-2018, 05:46:02 AM   #7
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Default Re: Clutch Woes

Any single mass will introduce a lot more vibration and noise. Additionally the setup can be imbalanced if it wasn't balanced properly from the factory.
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Old Sat, Apr-14-2018, 11:15:34 AM   #8
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Default Re: Clutch Woes

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Originally Posted by ricol33t View Post
Any single mass will introduce a lot more vibration and noise. Additionally the setup can be imbalanced if it wasn't balanced properly from the factory.


I wish I knew if this was just the product of the fly wheel


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Old Sun, Apr-15-2018, 09:31:45 PM   #9
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Default Re: Clutch Woes

Hypothetically if the TOB was bad:

A: It would be noisy with the clutch pedal down.

B: It would be noisy with the clutch pedal up.


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Old Mon, Apr-16-2018, 07:33:51 AM   #10
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Default Re: Clutch Woes

Quote:
Originally Posted by maynard423 View Post
Hypothetically if the TOB was bad:

A: It would be noisy with the clutch pedal down.

B: It would be noisy with the clutch pedal up.


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A.


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Discussing Slight vibration after subframe reinforcement in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)