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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 12-23-2010, 06:11 PM
mrpumpk1n mrpumpk1n is offline
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vacuum leak found (i think), need help with next steps.

97 540iA
170xxx miles


Hello everyone, yesterday i was doing some diagnosis to figure out where my vacuum leaks are. it is so bad now that you can hear the whistling/air leaking kinda sound. anyways i followed the video found on bluebees link on how to test for vacuum leaks on an m62 engine and i took a video of what i found myself. my second video for some reason is "corrupt" so its not playing, so il link the first one here. i dont know how to embed it onto this post directly so here is the link:



this is the first video, where there seems to be a pretty bad vacuum leak on the throttle body gasket (is that what its called?). anyways, my question is how involved do you think it is to replace the gasket here, im planning on getting the part and DIYing it, and this will be my first DIY on my car. i am somewhat mechanically inclined but not much. Also, are there any other parts that i need to get when doing this? such as any random o rings and what not?

also, is this the part i need? #14 on http://realoem.com/bmw/showparts.do?...37&hg=11&fg=40

Are there anything else i should do in terms of maintainance when im doing this?

(there is another vacuum leak on the left side of the engine, cant exactly tell where it is as i cant really pinpoint the exact location and doesnt seem to be coming from any exact hose, hope the intake manifold isnt cracked. when i retake a video of that, il post it up).

Thank you in advance, and happy holidays!
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  #2  
Old 12-24-2010, 11:47 AM
mrpumpk1n mrpumpk1n is offline
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anyone?
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  #3  
Old 12-24-2010, 01:14 PM
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doru doru is online now
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I am not sure about the v8, by your vid I think it's around the air intake? If so, check for leaky seals.
the guys maybe are prepping X-mas now....

GL
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  #4  
Old 12-24-2010, 05:38 PM
96 GGM 528I 96 GGM 528I is offline
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Go to HDR (home depot racing) get at pvc endcap roughly the size if your intake. Might need a pvc rubber coupler to adjust to the size of your throttlebody. Put an air hose fitting in the endcap and pressurize the intake with 10psi. You will hear it leak out and be able to follow the sound of the leak without the engine running. Just search boost leak tester in google and search images. Hundreds of pictures of the device I mentioned will be posted. heres one I found.
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Old 12-24-2010, 09:33 PM
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TemporarySanity TemporarySanity is offline
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I'm pretty sure it's the seal between the throttle body mounting plate and the intake. Mine was bad a few years ago, Cheap seal and somewhat easy to replace. The hardest thing was a couple of the bolts were hard to get to and get out without stripping them. They are a Torx, although I don't remember exactly what size.
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Old 12-24-2010, 11:35 PM
mrpumpk1n mrpumpk1n is offline
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thank you guys, so the part that were all refering to then is #14 on http://realoem.com/bmw/showparts.do?...37&hg=11&fg=40 correct?
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  #7  
Old 12-25-2010, 05:59 PM
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TemporarySanity TemporarySanity is offline
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Link doesn't work. Number 11 is the part I am referring to.
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  #8  
Old 12-25-2010, 10:53 PM
mrpumpk1n mrpumpk1n is offline
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yup thats the part i was refering to, for some reason, on realoem, thats part #14 but i guess thats because i have a 97 model and may be the parts are a bit scattered? basically its the "profile gasket" between the intake manifold and the throttle body right? il go ahead and change this part this week then and report back on how things change. thanks for all your help guys! and happy holidays
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  #9  
Old 03-20-2011, 09:37 AM
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BigCo540i BigCo540i is offline
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Quote:
Originally Posted by mrpumpk1n View Post
il go ahead and change this part this week then and report back on how things change.
Well??
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Old 03-20-2011, 12:34 PM
bobdmac bobdmac is online now
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Well??
+1. For me, this kind of thing doesn't rise to the level of annoyance, because I didn't contribute anything to the original discussion, but I think it's worth commenting on. If people go out of their way to try to help you, simple courtesy should dictate that you come back and tell them what you did, and whether the advice was helpful or not. Beyond courtesy, your response can contribute to the overall knowledge available here.
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  #11  
Old 03-20-2011, 03:24 PM
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BigCo540i BigCo540i is offline
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^Yeah that, and it sucks when you search something, read through the thread for the result, and end up with nothing.
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Old 04-06-2011, 11:14 PM
mrpumpk1n mrpumpk1n is offline
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sorry guys, i updated this post with another post back in january. basically i got a full cooling system overhaul done, with the valley pan gasket as well, so wound up changing the whole intake manifold gasket in the process, along with the throttle body gasket. also changed out my intake boots, and the ccv. now the car runs perfect, no rough idle, sometimes there are slight vibrations, but no misfire codes are being stored.
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  #13  
Old 04-07-2011, 06:32 AM
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BigCo540i BigCo540i is offline
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Quote:
Originally Posted by mrpumpk1n View Post
sorry guys, i updated this post with another post back in january. basically i got a full cooling system overhaul done, with the valley pan gasket as well, so wound up changing the whole intake manifold gasket in the process, along with the throttle body gasket. also changed out my intake boots, and the ccv. now the car runs perfect, no rough idle, sometimes there are slight vibrations, but no misfire codes are being stored.
That's basically the same thing I had done with the same results but I changed VC gaskets also.
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  #14  
Old 04-07-2011, 05:00 PM
mrpumpk1n mrpumpk1n is offline
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oh ya forgot to mention that, i also changed the valve cover gasket, and all the drive cables.
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