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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 10-09-2012, 08:30 PM
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ill540i ill540i is offline
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540i low on coolant today?

I replaced my radiator about 8 months ago,including my upper hose and earlier i start my car and check coolant level comes up and i topped it of with water,i think i put a little too much,is it bad to drive it like that for about a month until i have enough founds to do the overhaul? And i also checked and can't see any leaks?

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  #2  
Old 10-09-2012, 10:26 PM
JimLev JimLev is offline
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Mein Auto: 540/6, S60 Volvo, Tribeca
How much did you have to add?
If you really overfilled it just drain some out.
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Old 10-09-2012, 10:46 PM
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ill540i ill540i is offline
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I really overfilled it the stick is coming all the way out=/
What would be the easiest way to drain some out?

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Old 10-09-2012, 11:04 PM
edjack edjack is offline
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Via the radiator drain valve.
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Old 10-09-2012, 11:12 PM
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ill540i ill540i is offline
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Do it while the car is on,or just has to be warmed up?

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Old 10-10-2012, 07:25 AM
jygesq jygesq is online now
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or use a turkey baster to take coolant from

Quote:
Originally Posted by ill540i View Post
I really overfilled it the stick is coming all the way out=/
What would be the easiest way to drain some out?

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from overflow tank.
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Old 10-10-2012, 07:43 AM
mbell666 mbell666 is offline
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Mein Auto: e39 2002 540i6
Personally I use a turkey baster or something. I avoid pulling the radiator drain as it will let out quite a bit of water and is hard to control the flow/ get it back in. I probably go for the expansion tank bottom hose if not turkey baster. Do it when the engine is OFF and fully COLD, the same as testing the coolant level.

For the leak check under the expansion tank, where the sensor is. If you had a replacement expansion tank from Behr fitted, 8 months is bang on schedule for it to fail. You'll need to replace it with a genuine BMW one. Also check the metal/plastic joins on the radiator, these are a failure point even on new radiators. Otherwise it could be your valley pan gaskets, normally leak slowly and the water runs down the transmission area.
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Old 10-10-2012, 07:49 PM
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ill540i ill540i is offline
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I ve only had the radiator and the upper hose replaced,and thank you for the help guys im gonna reduce the water amount asap

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