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The BMW Range
5 Series
E39
E39 Aux fan (electric fan)
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<blockquote data-quote="lwloh" data-source="post: 562298" data-attributes="member: 18923"><p>As i had water temp problem recently, (which was traced out due to burned head gasket) and based on my experience on seeing the coolant temp on board while running, the aux fan will start to run at a higher speed once coolant temp (under test 7 on OBD) reaches 100C. Once it reaches 110, it will run at the highest speed. Once it touch 115C for about 5 secs or more, the water temp gauge will start to move higher to the right.</p></blockquote><p></p>
[QUOTE="lwloh, post: 562298, member: 18923"] As i had water temp problem recently, (which was traced out due to burned head gasket) and based on my experience on seeing the coolant temp on board while running, the aux fan will start to run at a higher speed once coolant temp (under test 7 on OBD) reaches 100C. Once it reaches 110, it will run at the highest speed. Once it touch 115C for about 5 secs or more, the water temp gauge will start to move higher to the right. [/QUOTE]
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E39 Aux fan (electric fan)
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