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  • Bronze Donating Members
  • Member For: 12y 5m 26d
  • Gender: Male
  • Location: wollongong

I have just noticed that everytime I stop at a set of lights my fans are running ... one they are one while driving on the freeway. two my temp gauge says its on half way and I mean always even when cold air is raming down its guts on the free way doing 110 im going to the the elimination game starting with the thermostat any ideas ... its a 04 ba xr6t stock !

  • Bronze Donating Members
  • Member For: 12y 5m 26d
  • Gender: Male
  • Location: wollongong

really its like its always on while im driving and it dose not leave half way it just stays on the half way mark it never use to do this like still doing 100 on the free way and its still sitts on half way im sure that's not right I know it should go down and the fan should be on doing 100ks

  • Bronze Donating Members
  • Member For: 12y 3d
  • Gender: Male
  • Location: WA

Sounds like your thermostat is working well mate. My FG turbo sits on half on the temp gauge aswell. Do your fans cycle in and out? If they do then the switch is working. If they don't, then check the resistance across the switch. If it changes as the car gets warmer then you can assume that the switch is working. Also Check the fan relay by checking you don't have continuity across the 87 to 30 terminal.

For your thermostat, pull it out and put it in a pot on the stove with a thermometer and check that it starts to open around the 65deg Celsius mark and I think it should be fully open at 80deg Celsius.

Or a simple check is to buy yourself a $60 infra red thermometer and check the temperature of the thermostat housing. If its about 75deg C when the fans come on then there is no problem.

  • Like 1
  • Bronze Donating Members
  • Member For: 12y 5m 26d
  • Gender: Male
  • Location: wollongong

its all good :) ill check all that tomorrow I got my self a new thermostat sitting in my govebox for tomorrow on my lunch break .... it just dont sound right that the fans are on while im doing 100k on the freeway like it useto be like the faster you go the more air you get the cooler the temp is but mine just stay at halfway and fans are always on :S but hey if you think its normal I get I might be getting worried for no reason :\ oh well ill keeps you all posted as my boss is a mechanic by trade so ill see what his imput is aswell

  • Bronze Donating Members
  • Member For: 13y 11m 30d
  • Gender: Male
  • Location: Victoria

I had this problem in my BA and changed the thermostat out which fixed it. Old thermostat was cactus and wouldn't open when I popped it in a glass of boiling hot water from the kettle.

  • Sucker
  • Moderating Team
  • Member For: 20y 11m 30d
  • Gender: Male
  • Location: Brisbane

Is halfway normal? It's been a while but I thought it was more like 11 o'clock on the dial.

I assume your fans are running at full speed (otherwise you wouldn't be able to hear them while doing 100km/h)...that definitely isn't normal.

  • Moar Powar Babeh
  • Lifetime Members
  • Member For: 19y 7m 1d
  • Gender: Male
  • Location: Perth

Mick, do you generally fit cooler thermostats when tuning cars? Whats your thoughts in lower temp thermostats and motors with forged pistons?

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