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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 05-15-2013, 05:19 PM
Rob13567 Rob13567 is online now
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Question what's this leak

I found this leak or spill and I tried looking it up, found nothing
Please help?
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  #2  
Old 05-15-2013, 06:31 PM
timarnold timarnold is offline
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Can't really tell, but it's most likely either the water pump or thermostat leaking. While you are in there replace both.
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  #3  
Old 05-16-2013, 06:41 AM
Rob13567 Rob13567 is online now
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Is it Really? this is on the passenger side of the engine thought the thermostat was in the front of the engine?
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  #4  
Old 05-16-2013, 06:43 AM
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tmvE39/E53/Z32 tmvE39/E53/Z32 is online now
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I can't tell where the leak is in your pic.
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  #5  
Old 05-16-2013, 07:14 AM
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Fudman Fudman is offline
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You need to put an arrow on your picture to better describe the location. You also need to better define the fluid that you have discovered. Color, consistency (oily or watery), smell, etc. Without additional detail, we cannot assist or it would be a WAG.
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  #6  
Old 05-16-2013, 07:17 AM
rdl rdl is offline
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I too, cannot see a leak.

However, if the red arrows point at the leaks, it's the expansion tank.
If the yellow arrows, the lower rad hose. The electrical sensor in the lower rad hose is the radiator outlet temp sensor used to control the electric auxillary fan in front of the rad and A/C condenser.

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  #7  
Old 05-16-2013, 12:16 PM
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dtadrian dtadrian is offline
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what's this leak

Get a white paper towel and clean some off. Also touch it and smell it. When engine cold wipe you hand under the vanos unit. Let us know what you find


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  #8  
Old 05-16-2013, 12:58 PM
Rob13567 Rob13567 is online now
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Truly sorry guys did not realize it was a bad pic
I took two more to show the leak, one far away and one close up with arrows
To make sure
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  #9  
Old 05-16-2013, 01:05 PM
chemist chemist is offline
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valve cover gasket leak
mine made mess in that area
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  #10  
Old 05-16-2013, 01:13 PM
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dtadrian dtadrian is offline
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what's this leak

Could be VCG leak or vanos leaking. Get a mirror and look. Maybe get brake cleaner and clean area and check it daily to confirm location of leak


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  #11  
Old 05-16-2013, 02:01 PM
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Fudman Fudman is offline
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Rub a clean paper towel under the edge of the VC rim. If it comes up oily, that's your leak: valve cover gasket.

see beisansystems.com for the DIY fix. ~ $40 for the part. You may want to consider replacing your Vanos seals since you are half way there. Do a search for why.
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  #12  
Old 05-16-2013, 02:22 PM
Jim Rolando Jim Rolando is offline
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That's where my VCG was leaking. Once that far repairing it I decided to also changed the VANOS seals.
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