Datatek viscous fan delete

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Bladerunner919

Active Member
Posts
228
So, I have plan to do the fan delete using Datatek's instructions, but instead of using the capillary thermostat attached to the coolant hose, I'm thinking along the lines of a sensor like this:

Fan Switch 97C/85C M14 x 1.5 - Car Builder Solutions - Kit Car Parts and Accessories

...screwed into the head. I have a non-egr DSE, so the head had two temperature sensors in it, but had the blanked-off holes to take an extra sensor.

So, is there any downside to the idea (I have the head off already, so ease of installation isn't an issue) and, if not, what temperature do you think the fan should come on at, as there are various versions of the sensor with different ratings? I realise I could us Nanocom to see what the running temp is, and base a decision on that, but the dismantled nature of the engine rather precludes that! :)
 
The downside is that you cannot set the ideal temperature and the head temperature varies according to location. You will end up with either the fans not coming on until too late or coming on too early.
Why do you think I did not do that? Mine already has the third sensor so it would have been dead easy.
 
Hi,

You can use the BMW 61311378073 like BMW Auxiliary Cooling Fan Switch 61311378073 - URO Parts 61311378073 - Free Shipping

Its a dual switch 91-86 and 99-94 ºC.

Select for example, the first "speed" for the fan (91-86).
The second (99-94) for a warning light, buzzer etc...
It will not do the job, my mod is not for auxilary cooling fans, it is to use the aircon fans as the main cooling fan, as such the temperature setting at which the fans operated needs to be set correctly which you cannot do with a fixed temperature sensor, especially as the set point at which they operate is subject to quite a wide tolerance.
 
.... as such the temperature setting at which the fans operated needs to be set correctly ....

Datatek, can you explain me and others, how do you set correctly the "on" kick, with a dial/joystick and a 110% untrusted gauge in the instrument pack?

With this sensor, you know he will "trigger" at 91 and 99 + tolerance.
He will be installed in the engine head, as is the ECU and instrument pack sensor (and MY00 with a auxiliary sensor to kick the AC fan).
 
Datatek, can you explain me and others, how do you set correctly the "on" kick, with a dial/joystick and a 110% untrusted gauge in the instrument pack?

With this sensor, you know he will "trigger" at 91 and 99 + tolerance.
He will be installed in the engine head, as is the ECU and instrument pack sensor (and MY00 with a auxiliary sensor to kick the AC fan).
Temperatures in the head vary a lot according to location, if it was a good idea to use a sensor in the head the likes of Kenlowe would do so. Top hose effectively gives water temperature that is an average of the hot and cold spots in the engine and therefore IMO is the best place to put the sensor unless you can fit it to the RAD itself as many manufacturers do.
You can set the on temperature using the gauge if it has been operating reliably, or you can do as I did and use a cheap DVM with a temperature probe. The gauge is perfectly adequate.
 
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