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7 Series - E38 (1995 - 2001)

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  #1  
Old 11-07-2013, 03:13 PM
docrober docrober is offline
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Unhappy E38 Air noise

I recently had an oil change and did not drive the car for about 5 days. I drove the car this morning and had no issues. Drove it this evening and I am getting this air popping noise as if there is a hole in the exhaust on the drivers side. . When the car is stopped, there is no noise. It only happens when I am driving and when I get to 35 or 40 mph. I am thinking that the tech may have not secured the oil filter?

Any thoughts.

Last edited by docrober; 11-07-2013 at 03:15 PM.
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  #2  
Old 11-07-2013, 03:34 PM
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QSilver7 QSilver7 is offline
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Quote:
Originally Posted by docrober View Post
... I am thinking that the tech may have not secured the oil filter?

Any thoughts.
If you think the oil filter isn't secure...did you pop the hood to take a look? How about unscrew it and screw it back on...it shouldn't be screwed on that tight anyways. If you didn't know...the oil filter reservoir is located on the driver's side of the engine bay...right up top where you can see it without any obstruction. If the lid to the reservoir isn't on tight...you'll see oil running out of it when the engine is running.

The oil filter reservoir is the round cylindrical thingy at the near bottom right in the image below:



(this is the oil filter & reservoir from my e39 w/M62TU engine...but the reservoir is basically in the same location and looks just like the one in the e38)

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Last edited by QSilver7; 11-07-2013 at 03:36 PM.
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  #3  
Old 11-07-2013, 11:05 PM
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FABOCH FABOCH is offline
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Oil filter cap not on correctly will Not cause popping sound only oil leak
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  #4  
Old 11-10-2013, 12:59 PM
Podmore Podmore is offline
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An exhaust leak is usually quite distinctive and louder under acceleration, and is most unlikely to be associated in any way with any activity required to perform an oil change.

If the spark plugs were checked / changed, it is possible that one was not properly tightened and your will hear a pffft pffft pffft noise which increases in tempo with increased RPM. However that the noise is only apparent at 35 - 40 mph is puzzling .... plug leaks are pretty noticeable at all speeds.
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Old 11-10-2013, 03:08 PM
Mayorchuck Mayorchuck is offline
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Did they use a lift to change the oil? There is a known issue of wind noise when the bottom jack pads are missing. Easy enough to check.

http://www.bimmerfest.com/forums/sho...k+pads+bluebee
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  #6  
Old 11-12-2013, 06:45 PM
docrober docrober is offline
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Thanks everyone. for your feed back. QSilver7 thanks for the pictures. I did know where the oil filter was located. I ended up taking the car back to the shop and magically the noise disappeared. I was weird to hear the noise and only at 35-45 mph was even more confusion. BTW the oil filter was loose when I checked and had mild oil leaking from it. I wanted to make sure that I covered all options.
Thank you all for responding.
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