E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > E46 BMW > General E46 Forum

General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 02-20-2013, 08:25 AM   #1
ventresca
Registered User
 
Join Date: Jun 2012
Location: Rome, Italy
Posts: 11
My Ride: 1998 E46 320i
Jerking Clutch v2.0 :)

Hi everybody,

Let me introduce my adventure with my clutch, some time ago I was helped by dmax to solve a jerking clutch issue, the message that speaks about it is this:

http://forum.e46fanatics.com/showthread.php?t=927156

I was really happy at that time because the issue seemed solved, but after a week the clutch started again to buck so I've bedded the clutch for another 2 times but with the same result, after a week or 3/4 days the clutch started again to buck!

I remembered that dmax said that the last resort was to bleed the clutch, so I've changed all the brake fluid (2 years old so time for a full replacement ) and when we bleeded the clutch slave cylinder (after the brakes bleed) we noticed that lot of bubbles squirted out.

After the clutch bleed the clutch was like new!!!! No jerks, no buks, smooth starts also at 800 rpm, also in the heavy traffic with no problems at all.
Also this time after a week I started to experience the old buck issue.
The clutch starts to jerk near the complete release of the pedal, it is more evident when the engine is cold less when it works in the correct temperature.

Now I'm experiencing also an ugly noise when I start the engine after the night rest, the noise disappear when I press the clutch pedal and when the engine is hot.

I think that the issue is in the master/slave clutch cylinder, maybe one of them let in a small amount of air and do the issue.
I'll try to bleed again the clutch to see if I still have bubbles that squirt out of the cylinder, if it occur maybe a cylinder replacement could be the answer.

So please anyone have (dmax for example ) an Idea/clue/suggestion about this issue?

Thanks a lot to everybody!

Ciao.

Fabio.
ventresca is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 02-20-2013, 08:33 AM   #2
Patton323I
Registered User
 
Join Date: Jan 2011
Location: Savannah, GA
Posts: 863
My Ride: R1100GS E46 E53
If you had a bad seal in the slave, it may cause fluid to bleed past and cause the cylinder to disengage prematurely.
__________________
Patton323I is offline   Reply With Quote
Old 02-20-2013, 08:48 AM   #3
DHK
Registered User
 
Join Date: Mar 2012
Location: Estonia
Posts: 681
My Ride: 2002 BMW 325Ci
Don't know how serious your issue is, but in every manual Ive ever driven if you are timid with the gas pedal when releasing the clutch you get bucking, especially when everything is cold.
Is this normal? I don't know but in my experience being liberal with the gas is the best solution until everything gets warm and toasty.
DHK is offline   Reply With Quote
Old 02-20-2013, 09:19 AM   #4
ventresca
Registered User
 
Join Date: Jun 2012
Location: Rome, Italy
Posts: 11
My Ride: 1998 E46 320i
Quote:
Originally Posted by DHK View Post
Don't know how serious your issue is, but in every manual Ive ever driven if you are timid with the gas pedal when releasing the clutch you get bucking, especially when everything is cold.
The issue is more evident when the engine is cold, but it do not disappear at all when the engine is hot, also if i raise the rpm up to 1500 when I release the clutch.

Quote:
Originally Posted by DHK View Post
Is this normal? I don't know but in my experience being liberal with the gas is the best solution until everything gets warm and toasty.
You're right, btw I'm a bit experienced with the manual shift and I assure you that the problem occurs also when the engine is hot (with a clutch release with both low or high rpm ).

Thank you for your help.

Ciao.

Fabio.
ventresca is offline   Reply With Quote
Old 02-20-2013, 09:23 AM   #5
ventresca
Registered User
 
Join Date: Jun 2012
Location: Rome, Italy
Posts: 11
My Ride: 1998 E46 320i
Quote:
Originally Posted by Patton323I View Post
If you had a bad seal in the slave, it may cause fluid to bleed past and cause the cylinder to disengage prematurely.
And so a premature disengage could jerk the start!
This sounds good!
Thank you!

Ciao.

Fabio.
ventresca is offline   Reply With Quote
Old 02-20-2013, 09:26 AM   #6
lcoleman
Registered User
 
Join Date: Mar 2007
Location: the barnyard
Posts: 2,458
My Ride: '79 Massey Ferguson
Quote:
Originally Posted by ventresca View Post
Now I'm experiencing also an ugly noise when I start the engine after the night rest, the noise disappear when I press the clutch pedal and when the engine is hot.
This sounds like a throw out bearing, which may or may not be related to your issue.

A lot of bubbles in the line sounds like a leak somewhere, though. Gotta dig around the master and slave and look for fluid leaks.
__________________
lcoleman is offline   Reply With Quote
Old 02-20-2013, 05:02 PM   #7
dmax
Registered User
 
dmax's Avatar
 
Join Date: Aug 2006
Location: NJ
Posts: 22,827
My Ride: '99 328i 1.04646 mu
Sounds like you got some good advice. I'd certainly look to see if you see fluid from the clutch slave or the master. Mine are amazingly still good, but they, like all parts, can fail. Beyond that, you got me...I've seen many clutches and understand the principle, but I wouldn't want to offer advice on whether it's something internal. Throwout bearing, I believe will rattle when your clutch is down when it's bad, but it might have other symptoms too, like sticking...IDK.

GL!
__________________


Performing at the Comedy Cove--595 Morris Ave. Springfield NJ reservations 973 376-3840

A recent set

dmax on the radio every Wednesday 7-9 p.m. NYC time. Call in! (661) 449-9340 watsonnwatson.com
dmax is offline   Reply With Quote
Old 02-20-2013, 05:52 PM   #8
Andy2108
Registered User
 
Join Date: Nov 2009
Location: U.S.A.
Posts: 8,039
My Ride: E46 M3, '67 Cobra
Looks for fluid leaks.

Does your car have a clutch delay valve? Search for that or CDV to see what I'm talking about.
__________________


De gustibus non est disputandum.
Andy2108 is offline   Reply With Quote
Old 02-21-2013, 03:04 AM   #9
ventresca
Registered User
 
Join Date: Jun 2012
Location: Rome, Italy
Posts: 11
My Ride: 1998 E46 320i
Quote:
Originally Posted by dmax View Post
Sounds like you got some good advice. I'd certainly look to see if you see fluid from the clutch slave or the master.
Hi dmax I'm happy to hear you again!
Last time that we bleeded the clutch we didn't see any fluid around the slave cylinder, we have to check again the slave and the master.

Quote:
Originally Posted by dmax View Post
Mine are amazingly still good, but they, like all parts, can fail. Beyond that, you got me...I've seen many clutches and understand the principle, but I wouldn't want to offer advice on whether it's something internal.
I've asked about you because last time you gave me a lot of good clues and suggestions, and for me you are a bit Italian!

Quote:
Originally Posted by dmax View Post
Throwout bearing, I believe will rattle when your clutch is down when it's bad, but it might have other symptoms too, like sticking...IDK.
GL!
OK, I understand.

First of all I have to bleed again the clutch and check both the clutch cylinders, if the problem is there I'll change one or both the cylinders.

If the cylinders are good and no evident leak from the circuit, I have to pull down the gearbox and check all the clutch system (maybe at 155.000 Km if I have to pull down the gearbox I should think to replace the clutch anyway).

I think that in the end I should pull down the gearbox anyway to check the throw out bearing and the clutch system...

Thank you again!
Ciao.

Fabio.
ventresca is offline   Reply With Quote
Old 02-21-2013, 03:08 AM   #10
ventresca
Registered User
 
Join Date: Jun 2012
Location: Rome, Italy
Posts: 11
My Ride: 1998 E46 320i
Quote:
Originally Posted by Andy2108 View Post
Looks for fluid leaks.

Does your car have a clutch delay valve? Search for that or CDV to see what I'm talking about.
My car is a 1998 320i, no cdv, the cdv is for "real" engines not for little farts!

Jokes apart, for small cubes e46 bmw do not puts the CDV, the torque is too low to damage the clutch/gearbox.

Thank you for the help.

Ciao.

Fabio.

Last edited by ventresca; 02-21-2013 at 03:11 AM.
ventresca is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Censor is ON





All times are GMT -5. The time now is 06:34 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use