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 08-29-2016, 07:12 PM   #1
Hamretro
Registered User
 
Join Date: Mar 2014
Location: Australia
Posts: 27
My Ride: 2005 BMW 320ci E46
DISA is getting on my nerves...

Hi guys,

Just asking for some guidance in regards to what might be causing this noise.

Yesterday I came across an unusual noise from the engine bay which I later found out to be my DISA. It was making a very loud whine but it stops when I pull out the DISA electrical connector.

I've replaced the DISA about 6 weeks ago with no issue until yesterday. I removed the new DISA to double check the o-rings but couldn't fault anything wrong with it. It also holds vacuum and there is no rattle just to be clear.

I've done some recent preventative maintenance which I'll list below.

-Replaced valve cover gasket.
-Replaced VANOS o-rings.
-Replaced CCV filter and plastic vacuum pipes. (Intake manifold was removed so I fit new manifold gaskets and refreshed vacuum hoses.)
-New Tensioners, pulleys and drive belts.

Any help would be greatly appreciated.
Hamretro is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 08-29-2016, 07:16 PM   #2
All2kool
Registered User
 
Join Date: Mar 2016
Location: Portland, OR
Posts: 861
My Ride: 2002 325Ci
OK, I'll ask - did you replace the DISA with BMW OEM of aftermarket EBay? Seems you know what is wrong - the noise does not occur with the DISA not plugged in. I would hope that a warranty is in effect.
All2kool is offline   Reply With Quote
Old 08-29-2016, 07:20 PM   #3
jfoj
OEM ///Member
 
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 22,861
My Ride: 330CiC, M5, X5, E93
Is the whine with the engine running or stopped and the ignition on?
__________________
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
jfoj is offline   Reply With Quote
Old 08-29-2016, 07:32 PM   #4
Hamretro
Registered User
 
Join Date: Mar 2014
Location: Australia
Posts: 27
My Ride: 2005 BMW 320ci E46
OEM replacement with the rtv o-ring, only with engine running.

Last edited by Hamretro; 08-29-2016 at 08:07 PM.
Hamretro is offline   Reply With Quote
Old 09-05-2016, 05:19 PM   #5
Hamretro
Registered User
 
Join Date: Mar 2014
Location: Australia
Posts: 27
My Ride: 2005 BMW 320ci E46
Still not sure why it only causes the noise with it plugged in? If it was a vacuum leak I would have thought it would make the noise all the time...
Hamretro is offline   Reply With Quote
Old 09-05-2016, 06:00 PM   #6
All2kool
Registered User
 
Join Date: Mar 2016
Location: Portland, OR
Posts: 861
My Ride: 2002 325Ci
Quote:
Originally Posted by Hamretro View Post
Still not sure why it only causes the noise with it plugged in? If it was a vacuum leak I would have thought it would make the noise all the time...
Well that is an odd one. I would have thought it was defective but I gather I am incorrect if it's NEW and OEM.

What was the reason it was replaced? I do hope it wasn't because of the very noise that remained after replacement.
All2kool is offline   Reply With Quote
Old 09-05-2016, 06:54 PM   #7
Hamretro
Registered User
 
Join Date: Mar 2014
Location: Australia
Posts: 27
My Ride: 2005 BMW 320ci E46
At the time I was trying to figure out another issue where on cold start up the engine would almost stall, The DISA was replaced along with all the vacuum hoses, rocker cover gasket, ccv system etc. But the original DISA wasn't making any noise but after I replaced it the cold start issue was fixed.
Hamretro is offline   Reply With Quote
Old 09-05-2016, 08:26 PM   #8
Hamretro
Registered User
 
Join Date: Mar 2014
Location: Australia
Posts: 27
My Ride: 2005 BMW 320ci E46
If I unplug the DISA electrical connection while the engine is running at idle, the flap will be open right? So there will be no vacuum applied to the flap actuator diaphram because the solenoid will close the path of the vacuum from the reservoir.

When the solenoid is plugged in and engine running below 4000rpm it should allow the vacuum from the reservoir to reach the flap diaphram which will close the flap.

I'm thinking that there must be an internal leak from the diaphram. Orrr the solenoid which has a vent that allows atmospheric pressure back onto the diaphram which should only happen when the engine is above 4000rpm.

Thoughts?

Last edited by Hamretro; 09-05-2016 at 09:59 PM.
Hamretro is offline   Reply With Quote
Old 09-06-2016, 09:49 PM   #9
Hamretro
Registered User
 
Join Date: Mar 2014
Location: Australia
Posts: 27
My Ride: 2005 BMW 320ci E46
Well, just gunna give in to it. I have warranty for the DISA so I'll replace it again and hope for the best...
Hamretro is offline   Reply With Quote
Old 09-07-2016, 12:31 AM   #10
BaliDawg
Keepin' it real stock
 
Join Date: Aug 2012
Location: Riverside, CA
Posts: 5,528
My Ride: E24 E32 E46 E39 E84
Quote:
Originally Posted by Hamretro View Post
Just asking for some guidance in regards to what might be causing this noise.
What noise? Record a video with sound and post a link to it. Without that, we have no clue what it could be. Help us help you.
__________________
///Mmmmmm...
BaliDawg is offline   Reply With Quote
Old 09-07-2016, 03:18 AM   #11
Hamretro
Registered User
 
Join Date: Mar 2014
Location: Australia
Posts: 27
My Ride: 2005 BMW 320ci E46
I'll post it tomorrow when I get the chance. The best way I can describe it for now is a high pitch whine.
Hamretro is offline   Reply With Quote
Old 09-07-2016, 10:00 PM   #12
Hamretro
Registered User
 
Join Date: Mar 2014
Location: Australia
Posts: 27
My Ride: 2005 BMW 320ci E46
Link to video.
Hamretro is offline   Reply With Quote
Reply

Tags
disa, issue, noise

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 03:05 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
(c) 1999 - 2016 performanceIX Inc - privacy policy - terms of use