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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - E38 (1995 - 2001)

7 Series - E38 (1995 - 2001)

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  #1  
Old 09-16-2011, 08:03 PM
ac6fy ac6fy is offline
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Location: Orange Co., CA, USA
 
Join Date: Jul 2007
Posts: 28
Mein Auto: 2003 BMW Z4
00 740iL - Coolant level light on

My problem is that, my coolant level light is on, but when I checked the level of coolant in the radiator it was full. Anyone, had this kind of problem before?.
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2003 Z4 3.0i
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Merlotrot Metallic

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  #2  
Old 09-16-2011, 08:31 PM
jwarr1964 jwarr1964 is offline
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Location: Swan Valley, Idaho USA
 
Join Date: Aug 2011
Posts: 26
Mein Auto: 2007 650i Convertible
I have the same thing going on with mine. The mechanic pointed out a small leak at the top of one of the radiator tanks, He told me that with a little leak like that the system can draw in air. You might need to bleed the system. I'm just keeping a close eye on my temperature until the new radiator I ordered arrives.
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Old 09-17-2011, 03:18 AM
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PETER NEWMAN PETER NEWMAN is offline
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Location: RAINHAM KENT UK
 
Join Date: Mar 2010
Posts: 268
Mein Auto: BMW 635 CSi BMW 730i E38
The most likely cause for the coolant level light coming on whilst having a correct coolant level would be the coolant level sensor having failed.
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Old 09-17-2011, 09:03 PM
Ricardo567 Ricardo567 is offline
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Location: U.S
 
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Mein Auto: BMW 1994 325IC
Coolant light stays on

If the level of coolant is right, then it must be the coolant level sensor went bad.

Disconnect coolant level sensor and check for open or short.

Richard
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