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MERCEDES W116 Discussion specific to the W116 model

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  #1  
Old 26th July 2018, 01:56 PM
john erbe john erbe is offline
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Default 6.9 auxiliary fan test

Any ideas on how to check if the auxiliary fan is coming on at the correct temperature?
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Old 28th July 2018, 09:57 PM
aussie 6.9 aussie 6.9 is offline
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Default Re: 6.9 auxiliary fan test

Hi john. I think the fan should come on at 100c . It is controlled by a sensor in the thermostat housing.
I live in a part of the world where we often see temps well above 40c and I have fitted a 90c sensor so the fan comes on before things get too hot.
The temp gauge sensor is at the back of the right hand cylinder head so I think it can be reading a 100 and as it is not as hot at the front of the engine the fan may not come on till a bit higher reading is shown.
I have used a hand held temp gun to check that the fan is coming on when it should.
My car is Australian delivered and it came with a supplement to the instruction book saying that under extreme conditions that you may have to reduce speed to keep the temp with the limits.
Regards Mark.
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Old 12th October 2018, 02:16 PM
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Oversize Oversize is offline
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Default Re: 6.9 auxiliary fan test

Here’s a ‘new’ guy that’s posted loads of videos that can help...

https://youtu.be/tq2NnjK9AK0
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Old 12th October 2018, 09:21 PM
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c107 c107 is offline
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Default Re: 6.9 auxiliary fan test

Thanks, this guy has some good videos!
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