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E63 / E64 6 Series (2003 - 2013)
The E63/E64 BMW 6 Series builds on BMW's sporty heritage with aggressive lines and an incredible motor to back the design up. Available in coupe and convertible trims with a standard 4.8 liter engine producing 360 horsepower and 360 lb-ft of torque, the 6-series is a popular choice that exceeds expectations.

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  #1  
Old 02-03-2013, 11:24 AM
davidrhenley davidrhenley is offline
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Location: Charleston
 
Join Date: Oct 2012
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Mein Auto: 2007 BMW 650i
2007 650i Engine Coolant Leaking?

I first noticed in December 2012 that my coolant level was low because the warning light came on. Long story short I added 1/2 gallon of distilled water and the light has stayed off since.

Today I decided to check the level and the stick that bobs up in the water was not sticking out. So I added most of the remaining gallon of water to completely fill up the coolant tank.

I have to take it to be serviced for brake fluid so I guess I can ask about it then.

--

In the meantime, any ideas on what could be happening?

I don't know that much about cars so anything I could say that would keep me from getting completely taken advantage of would be helpful since I'm taking it to the dealership ('cause they give me a loaner car and I'm a single guy without another ride).
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  #2  
Old 02-04-2013, 12:21 PM
07 E63650i's Avatar
07 E63650i 07 E63650i is offline
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Location: Southern California, USA
 
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Posts: 3,330
Mein Auto: 2007 BMW E63 650i
Quote:
Originally Posted by davidrhenley View Post
I first noticed in December 2012 that my coolant level was low because the warning light came on. Long story short I added 1/2 gallon of distilled water and the light has stayed off since.

Today I decided to check the level and the stick that bobs up in the water was not sticking out. So I added most of the remaining gallon of water to completely fill up the coolant tank.

I have to take it to be serviced for brake fluid so I guess I can ask about it then.

--

In the meantime, any ideas on what could be happening?

I don't know that much about cars so anything I could say that would keep me from getting completely taken advantage of would be helpful since I'm taking it to the dealership ('cause they give me a loaner car and I'm a single guy without another ride).
Oh no. You may have the dreaded coolant pipe leak that has plagued the N62 engine. Do a search on this topic as it can be a main factor for such a large loss of coolant.
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  #3  
Old 02-04-2013, 12:58 PM
andrewpk andrewpk is offline
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Location: SoCal
 
Join Date: Jun 2010
Posts: 8
Mein Auto: 2005 645 Ci
Check for leaks around your coolant expansion tank. That's typically the must likely source.

I just replaced mine over the weekend. It finally sprung a real leak after dripping slowly for a month.
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  #4  
Old 02-05-2013, 03:33 AM
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bimmerzone bimmerzone is offline
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Location: West Chester PA
 
Join Date: Jul 2005
Posts: 590
Mein Auto: E63 650i
Could be a simple leak from a hose, or the tanks.... or as bad as the transfer pipe, i would get it checked out, good luck!
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  #5  
Old 02-05-2013, 07:58 AM
tampamark tampamark is offline
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Location: tampa fl
 
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Posts: 2,911
Mein Auto: 2006 650 convertible!!!
You need to check a couple of places, some have been listed, but there is one not mentioned and is a common leak point. And a minor fix!

On the passenger side of the engine at the front, there is a lower radiator hose, in it is a sensor. The O-Ring fails and it could be leaking from there. The fact that yours is not coming out rapidly lends itself to a smaller leak point. If you take it to the dealer they will replace the entire hose and sensor for several hundred. But you can just buy an O-Ring from Home Depot and fix yourself.

http://www.bimmerfest.com/forums/sho...d.php?t=578644
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  #6  
Old 02-05-2013, 09:02 PM
HerbP HerbP is offline
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Location: Georgia
 
Join Date: Jul 2009
Posts: 2,768
Mein Auto: 2005 645Ci & 2007 750Li
If you are losing coolant, the expansion is most likely going to fail shortly! I would suggest changing the expansion tank, the bleed line, & the 0-ring for the coolant sensor. They can all be done within a hour. Overkill maybe, but the expansion tank will fail soon.

Good Luck!
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  #7  
Old 02-09-2013, 07:54 PM
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Nitrogen Nitrogen is offline
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Location: Central California
 
Join Date: Apr 2012
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Mein Auto: BMW 650i Convertible
While I was replacing my heater control valve I found this.

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Sorry pics are low quality it was dark and I used my phone. Look at the shimmering areas that is coolant leaking. I have been topping off every 2 weeks.

I took apart my fire wall cover and this is the back side of the engine.
This is the back of intake manifold. You think the curse has hit ?
I hear it leaks from the front more often but how often from the rear?
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  #8  
Old 02-10-2013, 12:15 AM
07 E63650i's Avatar
07 E63650i 07 E63650i is offline
Living in Fast Forward
Location: Southern California, USA
 
Join Date: Jan 2013
Posts: 3,330
Mein Auto: 2007 BMW E63 650i
Quote:
Originally Posted by Nitrogen View Post
While I was replacing my heater control valve I found this.

Attachment 361601

Attachment 361600

Sorry pics are low quality it was dark and I used my phone. Look at the shimmering areas that is coolant leaking. I have been topping off every 2 weeks.

I took apart my fire wall cover and this is the back side of the engine.
This is the back of intake manifold. You think the curse has hit ?
I hear it leaks from the front more often but how often from the rear?
Oh no, say it ain't so!
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