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DIY: Do It Yourself
Post here to share or improve your wrench turning skills! All BMW E46 DIY tips, tales, and projects discussed inside. Learn to work on your car and know the right BMW parts you will need!

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Old 03-10-2012, 01:55 PM   #61
jfoj
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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, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

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

Lower hose fan switch O-ring - BMW #13621743299
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Old 03-10-2012, 01:56 PM   #62
jfoj
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323/328 should be 1/8", 325/330 should be 3/32". Read the misfire thread below in my signature for more inf.
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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, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

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

Lower hose fan switch O-ring - BMW #13621743299
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Old 03-12-2012, 06:05 PM   #63
Kris.R
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Has anyone confirmed that the 3/32" fits the 325/330?
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Old 03-13-2012, 05:40 AM   #64
jfoj
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See my post directly above yours, 3/32" is for the 325/330.

If you need an O-ring, for $1 see this post if they are still available -

http://forum.e46fanatics.com/showpos...&postcount=192
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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, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

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

Lower hose fan switch O-ring - BMW #13621743299
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Old 03-19-2012, 11:01 PM   #65
tanik
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Dam miss out on the o rings

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Old 05-24-2012, 12:49 PM   #66
Tex323GripIsKey
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Hey guys, I have sourced an O-ring through BMA out of Cali. Although, I am in Texas. I am looking to pick up a temporary o-ring so I can do my lower intake boot replacement. What PN and brand would I be looking for for the 1/8th inch O-Ring?? For my 323i. I want to pick one up from say Autozone or Pepboys or Advance. Thanks for all of the help. Semi-Urgent. Was going to replace this evening so I need to pick up the ring before then. BMA is awesome though, getting the ring to me ASAP from Cali even on MDWeekend.
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I used to drive fast and cowboy around, but then I realized that I can't even afford bumping into someone, so now it's slow and classy, with occasional spurts of speed. Fanatics might pick on each other from time to time, but we are all one great big family that looks out for each other in the end.
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Old 05-26-2012, 08:39 PM   #67
SPL15
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Works great in a bind! The Fel-Pro gasket cost $6 from Autozone, it is slightly too big, but it does wedge in & eventually sunk in 100% flush after about 10 minutes of just sitting there tightened down. I'm guessing with a little heat & time, it should take a nice set/shrink & be able to be removed without loosing seal which will be nice when I replace the full CCV system in the fall. I lubed the o-ring groove, oring, & intake lip with motor oil. Also thoroughly cleaned off the intake lip with throttle body cleaner before re-assembly.

Idle when 'cold' is now nice & perfectly smooth like it is when the engine is warm. I'm guessing the DISA, ICV, & CCV were replaced in my car fairly recently as they were all relatively clean & functioning perfectly fine. I've been chasing down vacuum leaks since I bought the car in April; each & everyone of them has been hoses/lines, gaskets, or vacuum tap caps which is perfectly fine with me . This DISA gasket fix is the last thing on my checklist for vacuum leak repairs & now my car purrs during idle like it's brand new off the lot. Went through all the same & MUCH more with my used & abused E36 M3 a few years ago, this E46 is 90% the same overall design which is nice. Luckily this E46 was pampered like a 1st child so it's only minor things & 75% of the needed repairs have already been done.

Thanks for the info on this, I was to the point where I was about to gob a bunch of permatex liquid gasket on it.

Last edited by SPL15; 05-26-2012 at 08:44 PM.
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Old 05-31-2012, 05:27 PM   #68
TitanSl33pr
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This is great to find/hear about. Have had all of the symptoms n then some. Heading to Advanced or Auto Zone when I get off duty. Full weekend with replacement of all major cooling system components. Wooosah!!!

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Old 07-01-2012, 11:33 AM   #69
Dedney
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Gonna try this tomorrow!
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Old 07-01-2012, 12:50 PM   #70
bernie21614
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subbed for part gasket part number, Great Find!
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Old 07-01-2012, 02:43 PM   #71
jfoj
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Be careful about O-ring sizes.

Suggest you read the first link in my signature below.
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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, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

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

Lower hose fan switch O-ring - BMW #13621743299
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Old 07-20-2012, 01:36 PM   #72
da Vinci
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I have a '03 330i and the FelPro 35489 was definitely too thick, it measures .137" (3.5mm). I could tighten the DISA valve all the way and the plastic was flexing so I could still see the O-Ring. The valve was not sitting flat. I am surprised no one has cracked the tabs off their DISA valve. There is an O-ring/seal store right by my shop so I picked up a 55mm x 3mm silicone O-ring for less than $2 and I would not put anything thicker. You can fit anything from 50 to 55mm. I also picked up a #136 Silicone O-ring (136 to 138 are all good) and that seems to seal it fine. That measures .102" (2.6mm) but I wanted to see what the thickest o-ring I could fit without breaking anything.
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Old 12-09-2012, 12:03 PM   #73
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Successful disa repair

I would like to thank the E46 community for their help in diagnosing and providing guidance on replacing the DISA unit on my vehicle. All went very well and car is running much more smoothly now.

A couple of items for the cherries out there (my fellow cherries). I removed and changed out the air filter and the removed and cleaned the MAF during my process. I also removed the next intake piece behind the MAF though this was likely not necessary. If you do remove it, take a look down into the throttle to see if it is clean. Additionally, if you do remove this piece, put a clean rag or plastic over the hole leading to the throttle. You don't want anything getting down in there while you are working on the DISA.

I took the intake piece out before the DISA, which was a major PITA. So another reason to avoid doing that. But if you do take it out for some reason, replace it before you put the new DISA back in. It is a lot lot easier to put that back on and tighten the clams without the DISA being there.

Back to the story. My DISA was fried. I had initially thought about rebuilding it, but after I got a look at it I opted for the replacement. The plastic piece at the base of the flap was completely eaten away and disconnected from the flap. I read in the threads about whether the DISA could disintegrate and fly into the engine. Looking at mine, I believe it could happen.

Some other tidbits. The lower screw of the DISA is in line with another screw of exactly same size. So, me, of course, took out the lower screw, that I believe is a connector for the ICV. So if you have taken out two screws that look exactly alike and are getting resistance from the DISA in trying to take it out, make sure you have taken out the right lower screw. I have read here about a guy complaining about having a hard time taking his DISA out and I suspect this might have been part of the issue--though he may not want to admit it.

When you go to put the DISA back in, I found it helpful to have the back end (the end closest to the cabin) touch the manifold first and then angle it in from there--from back to front.

Only other issue is that it still throws 2973/2974 codes at me, though I guess from reading the forum that is not unusual. Anyone have any ideas on how to get rid of those once and for all? Car runs fine, so I think it is more of a problem with the SES programming then an actual problem with the engine.

Thanks again, between Youtube and this forum this is a repair that anyone can make.
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Old 07-18-2013, 07:31 PM   #74
invader59
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thanks OP - the FelPro O-ring fits perfectly!
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Old 07-18-2013, 08:37 PM   #75
geoffriehl
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guys -- I had no idea my post would help so many people out, So glad I was able to help!!!!!
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Old 10-21-2013, 10:04 PM   #76
jpark74
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I can vouch that the DISA valve affect your MPG.
When I purchased my e46 last year, the DISA valve was leaking and I was getting about 17-18mpg. Once I replaced the DISA, I'm around 21-22mpg.
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Old 10-22-2013, 02:53 PM   #77
3sge
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wait so after browsing through this thread, I'm confused to whether or not the O-ring will fit in my model. Will the 35489 ring fit on my 2004 325i convertible? thanks for the help

edit: nvm seems like it works. going to autozone to pick one up now. hope this will get rid of my p171,174

Last edited by 3sge; 10-22-2013 at 03:10 PM.
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Old 02-11-2014, 03:03 PM   #78
Boondockz
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I see from some pictures, that the DISA valve has a orange o-ring. I pulled mine today and it had a green o ring like the bav auto disa...and absolutely no play, im at 180 thousand, and just bought the car.

I'm under the impression that the stock is a orange o ring... Maybe I lucked out and have the bav auto disa...it looked pretty clean too.
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Old 02-11-2014, 06:25 PM   #79
Shesgota323
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I was just noticing that when inspecting my lower boot for cracks, thanks for the tip on what to buy to fix the issue!
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Old 02-11-2014, 06:42 PM   #80
geoffriehl
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I just really like how we are all helping each other out -- have to keep our beloved e46's running up to par!

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