Hi Guys,
 
I have been given a 16" thermo fan that will fit nicely in front of the engine behind the radiator and just had a few qn's.
 
I need to place a sensor somewhere and have a few options -
 
1.  Fit an adapter to the top radiator hose and insert sensor there
2.  Blank the hole in the thermostat housing and tap a hole to suit the temp sensor.  What is the thread size of the hole in the housing?
3.  Get a sensor plug welded into the radiator itself. 
 
For the temp sensor am I better off with an adjustable on or one of the pre set ones that come on at 85deg and off at 80deg?
 
Cheers,
 
Matt
 

Fit a fixed temp sensor to thermostat housing.if the thread/hole is to big for your sensor get a pinto thermostat housing with no hole(pre pollution), these housings still have the boss ready to be drilled and tapped to the size of your sensor.

To have correctly operating fan make sure that sensor on and off temps are well above thermostat temperature.

Cheers dude,

How much is "well above" stat temp?

Matt

Example for fan sensor fitted in thermostat housing
82c thermostat
93c fan on temp
87c Fan off temp

The important part is that the off temp is bit higher than the thermostat temp.
This will make sure your fan only runs when idling for a while or driven under high load and ram air is not enough.

Cheers

Awesome, thanks mate.

Any ideas on the thread of the stat housing plug?

Matt

Tridon temp switches, these can be bought in just about any auto store around the country, or if you want it cheap you could look up the one you want and then check which cars have them then go to wreckers....
http://www.tridon.com.au/...SG=8&S=35&G=483&P=2014

Not sure, will go in shed later and can check for you.

Thanks mate,

Good link too.

Matt

I dug around at the wreckers too and ended up using the thermo fan switch out of Mitsubishi Lancer (not sure which model). It bolts straight into the thermostat housing and has the 2 wires for you to wire it in to the fan relay correctly.
Works perfectly.

Thanks Bacca,
 
I have had a look and I'm pretty sure the thread is M16 x 1.5.  Tridon has this same size listed for a 2000 Lancer too and it's in the heat range I want as well.  80/85.
 
Cheers
 
Matt