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7 Series - E65 / E66 (2002 - 2008)
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  #1  
Old 08-08-2012, 02:36 AM
dirtdad dirtdad is offline
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Location: Blacksmiths Australia
 
Join Date: Oct 2010
Posts: 17
Mein Auto: 2004 735i sport
Ongoing Disa issue N62 engine

I had my pride and joy 04 735I for about a year before it lost low end torque and city fuel economy. It regularly returns Disa overheat fault 2281 and Disa failure 2280. Have confirmed that Disa position in INPA stays around 36 to 42% position. I am getting a voltage of( ! 140v) to the motor. It does show that exclamation mark before the 140v.
I have had the CCv's replaced and did a look into the intake manifold /Disa and found it very oily. I was able to move the blades with my fingers to put in a new position to ensure the position sensor was reading correctly. I'm about to remove it and clean it and replace the Differential pressure sensor as it has to be a trigger for the disa to change position and it's probably gummed up with oil gunk.
What I need to know is how to confirm the Disa drive motor is operational.
This is essentially the same system as a 740 or 745 so if you have any ideas good or bad let me know.
Thanks all in advance
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  #2  
Old 11-01-2012, 11:54 AM
lotusbled lotusbled is offline
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Location: ottawa, canada
 
Join Date: Jun 2010
Posts: 58
Mein Auto: 745li, lotus esprit, 540i
Disa

Hi there, it appears that no one has an answer for you and neither do I, sorry! I however have the same codes and symptoms. Just wondering if you solved the problem? Any help would be appreciated. Thanks Ross.
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  #3  
Old 11-12-2012, 10:02 PM
dirtdad dirtdad is offline
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Location: Blacksmiths Australia
 
Join Date: Oct 2010
Posts: 17
Mein Auto: 2004 735i sport
And the answer is!

I bit the bullet and removed the disa manifold from the car and found it gummed with oil sludge. You can remove the butterfly vale at the front of the disa easily to have a restricted view inside, I saw oil deposits.I cleaned it out as best I could with petrol in a large tub as you really cant open the disa manifold despite there beining bolts holding to 2 halfs together.
WARNING: the gasket set was about $60 from pelican parts but I destroyed 1 water fitting (not paying enough attention) and cracked a rigid vacuum line that starts at the front and runs under the disa which cost $ 360 to replace.
All this said it was **** to work on but only took about 5hrs total and convincing my lazy teen to get off teh couch for 10 mins to help lift in and out, its not heavy just awkward.
END RESULT: Much improved and no more faults occuring. Fuel economy better since I discovered and curbed wifes driving style of "must beat everyone of the mark".
Oil issue in my car was idiot indie had overfilled car with oil.
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  #4  
Old 11-17-2012, 09:06 AM
lotusbled lotusbled is offline
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Location: ottawa, canada
 
Join Date: Jun 2010
Posts: 58
Mein Auto: 745li, lotus esprit, 540i
N62 issue

Thanks for the findings on your DISA issue. It's important that we post the out come of our problems. I to have the same codes and symptoms as mentioned previously. When I did my valve guide seals, I removed the intake manifold and found the same thing. I went a litlle farther and split the man. in half. What a mess inside. Anyhow cleand it all up with industrial detergent and reassembled. I still have DISA over heat issue......bummer! I'll keep working away at it.
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  #5  
Old 11-17-2012, 10:06 AM
SFbay SFbay is offline
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Location: SF
 
Join Date: Mar 2012
Posts: 893
Mein Auto: BMW 745i
Quote:
Originally Posted by lotusbled View Post
Thanks for the findings on your DISA issue. It's important that we post the out come of our problems. I to have the same codes and symptoms as mentioned previously. When I did my valve guide seals, I removed the intake manifold and found the same thing. I went a litlle farther and split the man. in half. What a mess inside. Anyhow cleand it all up with industrial detergent and reassembled. I still have DISA over heat issue......bummer! I'll keep working away at it.
Disa overheat means you need new actuator.... Probably bc of that mess.
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  #6  
Old 11-17-2012, 10:15 AM
lotusbled lotusbled is offline
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Location: ottawa, canada
 
Join Date: Jun 2010
Posts: 58
Mein Auto: 745li, lotus esprit, 540i
Actuator

Quick response, thanks. Just to be clear, your talking about the motor at the back of the man. that rotates the the intake runners? Also I have a vvt1+2 no communication, any thoughts. Thanks Ross.
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  #7  
Old 11-17-2012, 02:19 PM
SFbay SFbay is offline
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Location: SF
 
Join Date: Mar 2012
Posts: 893
Mein Auto: BMW 745i
Quote:
Originally Posted by lotusbled View Post
Quick response, thanks. Just to be clear, your talking about the motor at the back of the man. that rotates the the intake runners? Also I have a vvt1+2 no communication, any thoughts. Thanks Ross.
Yep, the motor or they call it disa drive
Vvt no communication means your vvti module is fried bc your ebox fan is most likely died- good case scenario. Vvti motors are stuck bc smth is wrong with shaft- bad case.
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  #8  
Old 11-18-2012, 08:28 AM
lotusbled lotusbled is offline
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Location: ottawa, canada
 
Join Date: Jun 2010
Posts: 58
Mein Auto: 745li, lotus esprit, 540i
Vvt

Hey, SF thanks again! I pretty sure the fan is working because I hear a fan running in and around the glove box after I turn off the ign. I'm going to check out the DISA. Still struggling with no sound. I found a rebuilt ASK (face lift) form a Georgia dealership however one of the other members says that I have to change the antenna as well as my car is an 02. What do you think? Ross
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  #9  
Old 06-26-2013, 10:16 PM
dirtdad dirtdad is offline
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Location: Blacksmiths Australia
 
Join Date: Oct 2010
Posts: 17
Mein Auto: 2004 735i sport
A further update. Have found a brilliant euro car specialist. Had a dead ebox fan, replaced fan motor with unit from jaycar (electronics store). DISA fail and overheat faults had returned. Tested out the Disa motor and opened and cleaned. Removed and Opened the intake manifold and found " shutter" on one cylinder had broken/ cracked at the attachment to the shaft that rotates to open/close the shutters, this had caused the shaft to jam up and hence DISA motor issues.
The Fix: Ebay, bought a manifold and DISA motor complete and will install it. cost $200 and $168 freight to Australia. New from BMW $4600 for just the manifold and unable to by any internals. Hopes this helps you if you found this thread
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