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Thermo Fans


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13 replies to this topic

#1 james

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Posted 16 February 2009 - 10:59 PM

Okay, so after Brad's mention of AU falcon thermo fans being a nice slim fit to replace the clutch fan on the front of the motor...
I'm curious!

What's the deal with these?
I presume mounting is not bolt in, but also not a great deal of work..

But, what about wiring? Just run a switch to the dash and turn them on when you're parked/at the lights?
Or leave 'em going constantly? Or is there a way they can be self-controlled?

(I have no idea about thermo fans but like the idea of having them! :P

Anyone experienced?
cheers!

#2 Lister

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Posted 17 February 2009 - 06:22 AM

Ok you can buy linear zipties(oil cooler/thermo fan mounting kits) basically a plastic screw that goes through your radiator fins and can hold the fans to it. You can also buy an adjustable thermo fan switch with a probe that fits into your top radiator hose. Both of these will be available from your local parts shop. Ice and Davies craig make the switch and plenty f cheap brands make the fitting kit. you will also need to buy a relay as the fan requires to draw around 20 amps to run and this shoud come directly from the battery via the realy....
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#3 gadget1382

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Posted 17 February 2009 - 09:53 AM

Easy to run... you get a Temp dependant switch, a relay and some connectors and conduit.

The temp switch i got is variable, so you can adjust when it turns on, and also came with a wiring diagram of how to set it up. It's really VERY simple in terms of wiring in something.

#4 gaz_man

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Posted 24 August 2009 - 08:16 AM

Easy to run... you get a Temp dependant switch, a relay and some connectors and conduit.

The temp switch i got is variable, so you can adjust when it turns on, and also came with a wiring diagram of how to set it up. It's really VERY simple in terms of wiring in something.


Funny enough about Ford fans, Ford Mondeo fans are a fit, they use twin 10s and they keep SR Gazes nice and cool :)
Quote Dave ****Since your asking these questions, its already way to hard for you. Give up now.No, im serious. Its a terrible idea.

#5 Cheddle

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Posted 27 August 2009 - 08:06 AM

Funny enough about Ford fans, Ford Mondeo fans are a fit, they use twin 10s and they keep SR Gazes nice and cool :P


ive got my intercooler where my radiator was and the radiator spaced back, still plenty of room between the engine and the radiator but how thick are the au/mondeo fans??

so either the falcon or the mondeo set up will fit? just drill some holes for the bolts/zipties?? or will the shroud require cutting?
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#6 gaz_man

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Posted 27 August 2009 - 08:19 AM

ive got my intercooler where my radiator was and the radiator spaced back, still plenty of room between the engine and the radiator but how thick are the au/mondeo fans??

so either the falcon or the mondeo set up will fit? just drill some holes for the bolts/zipties?? or will the shroud require cutting?


There not that thick, roughly 100 110 from what i can eyeball, they are an exact fit onto the SR radiator, if by cutting the shroud you meanthe thermo one, no need, fits straight on, if its the plastic shroud around the rad from the factory, forget it, get rid of it and run the fans, kept mine too cool, had to put in a thermo controller to turn them on and off instead of running them constantly
Quote Dave ****Since your asking these questions, its already way to hard for you. Give up now.No, im serious. Its a terrible idea.

#7 Cheddle

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Posted 27 August 2009 - 08:22 AM

There not that thick, roughly 100 110 from what i can eyeball, they are an exact fit onto the SR radiator, if by cutting the shroud you meanthe thermo one, no need, fits straight on, if its the plastic shroud around the rad from the factory, forget it, get rid of it and run the fans, kept mine too cool, had to put in a thermo controller to turn them on and off instead of running them constantly



i dont have the factory shroud as my radiator was re-positioned, without the shroud my clutch fun is useless... my radiator isnt in the best shape either and i plan on replacing it with a new S12 stocko one and then ill slap on the AU twin thermos with a supercheap auto controler.

are they ok to be run constantly??
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#8 gaz_man

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Posted 28 August 2009 - 09:12 PM

i dont have the factory shroud as my radiator was re-positioned, without the shroud my clutch fun is useless... my radiator isnt in the best shape either and i plan on replacing it with a new S12 stocko one and then ill slap on the AU twin thermos with a supercheap auto controler.

are they ok to be run constantly??


I run mine constantly, draws a bit of power but, needed a relay set up.
Quote Dave ****Since your asking these questions, its already way to hard for you. Give up now.No, im serious. Its a terrible idea.

#9 Cheddle

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Posted 17 October 2009 - 02:01 PM

I run mine constantly, draws a bit of power but, needed a relay set up.


do you notice any extra time taken to warm up or anything??? dosnt run too cold on low-load highway runs??
- S12 notch SGL-x - CA18DET REBUILT w/ 160 RWKW @14 PSI - coil-overs front+ falcon/commo rear - $5,000!!! 0407815680

#10 gerryb

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Posted 18 October 2009 - 11:26 AM

Don't run them constantly thermo fans do burn out and fail sometimes and also drain the electrical system to much. It always tends to be at the worst times thathey fail and if you don't constantly watch your temp guage could be disastrous, (from personal experience). Also I've had a probe snap off one of those probe type controller switches inside the radiator hose and then the fans just don't come on, they are shite.
You can get screw in type switches like temp senders, there are heaps and heaps of styles and on off temp setting available, this is what factory thermo fan setups use.
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#11 Cheddle

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Posted 24 October 2009 - 01:22 PM

Don't run them constantly thermo fans do burn out and fail sometimes and also drain the electrical system to much. It always tends to be at the worst times thathey fail and if you don't constantly watch your temp guage could be disastrous, (from personal experience). Also I've had a probe snap off one of those probe type controller switches inside the radiator hose and then the fans just don't come on, they are shite.
You can get screw in type switches like temp senders, there are heaps and heaps of styles and on off temp setting available, this is what factory thermo fan setups use.


thanks for the advice, I will try to find one of those screw in type ones, ive used them in the past for temp gauges and have never had a single issue...

id be inclined to "dodgey" the "probe" on one of the types you mention, and id actually wrap electrical tape around the radiator hose to "splint" the copper pipe/wire. surely the reason it snapped was becaues external vibration/pressure was applied to it... i cant see how the water flow snapped it.

I had an ET pulsar with a switch to control the thermo fans... was the biggest pain in the ass EVER... everytime you stop, flick, when you drive off, flick, stop, flick, go, flick, stop, flick, go... aARGGRRrgRGR

oh well. thermo fans arnt my higest priority right now... have basically every part of my suspension apart from the springs and shocks falling apart... sounds like a combination of a train and an african tribal drum dance when im driving "clickety dong bing bang pop da-dong bong" not a healty sound...

Edited by Cheddle, 24 October 2009 - 01:24 PM.

- S12 notch SGL-x - CA18DET REBUILT w/ 160 RWKW @14 PSI - coil-overs front+ falcon/commo rear - $5,000!!! 0407815680

#12 Cheddle

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Posted 16 November 2009 - 06:19 PM

my clutch fan decided it didnt want to be a clutch fan any more... so i got a craig daives temp switch for $55 - some wiring for $10 - and a 12in super cheap fan with wiring and relay for $69 - took me about 2 hours to install and works a treat :-)

given the condition of my radiator... im happy with the result
- S12 notch SGL-x - CA18DET REBUILT w/ 160 RWKW @14 PSI - coil-overs front+ falcon/commo rear - $5,000!!! 0407815680

#13 Dave

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Posted 16 November 2009 - 06:54 PM

I have 3 good condition S12 radiators in stock, should you require a replacement :)
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#14 S12NUT

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Posted 16 November 2009 - 08:41 PM

The supercheap controller that is described is not a bad unit, have had one on my V8 for 10 years . i didn't put the probe in the radiator hose though, i just poked it into the core between the fins , works fine just had 2 be turned up a little. Didn't like the in hose idea as is prone to leaks .




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