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Blown86 Regular Location: Perth Registered: July 2002	Re: thermo fans Wed, 07 May 2003 10:28 HKSPete wrote on Wed, 07 May 2003 15:52 My belief on thermo fans (installed on on my supra) is that if the car is off there needs to be water flow to get any result. What happens if like my engine the water pipes on the engine are both at the top of the engine? If the water in the radiator is cold (after having thermo fans on for a while) and the actual engine is still hot, then CRACK! blown headgasket etc. I understand this is extreme, but technically it could happen. Usually the thermometer that switches the fans is inside the engine, running the thermo fans outside the engine (radiator) won't cool down the engine where the thermometer sits. I could definately be wrong with this bit as I've no experience with leaving thermos on after the key (the key goes off everything goes off). End of the day you must sit with your car for the required cool down time to cool down the turbos. Turbo timers are good, but it needs to be in neutral, and theives can get through turbo timers a lot quicker than through the key barrel. Also it is EASY to pickout a turbo car with one as the car is still on while the person walks away! If you know your going to be stopping soon (2 streets away from home) then take it easy. Simple. When you get to your destination wait a little while and then turn it off. Thermos with the key is fine DacBietAE86. I ran with this in my car for a few months. Then I connected up another relay to the computer and now it controlls the fans. Only thing you'll notice is that it might take a TINY bit longer to warm up. Convection causes hotter coolant to flow to where there is cooler coolant. The engine is a big heat sink and keeps heating the coolant for some time after stopping the engine. This keeps happening until the thermostat closes. You can't get thermal shock in this situation. The thermo fan temp sensors are almost always located in the radiator. Circulating air around the engine when stopped is pretty useful, particularly after a few laps of the track. [Report message to a moderator]

	Subject	Poster	Date
	thermo fans	Yeeehah	Wed, 07 May 2003 00:30
	Re: thermo fans	ed_ma61	Wed, 07 May 2003 00:46
	Re: thermo fans	Yeeehah	Wed, 07 May 2003 00:48
	Re: thermo fans	ed_ma61	Wed, 07 May 2003 00:50
	Re: thermo fans	Yeeehah	Wed, 07 May 2003 00:59
	Re: thermo fans	ed_ma61	Wed, 07 May 2003 01:12
	Re: thermo fans	Yeeehah	Wed, 07 May 2003 01:16
	Re: thermo fans	ed_ma61	Wed, 07 May 2003 01:37
	Re: thermo fans	RobertoX	Wed, 07 May 2003 01:39
	Re: thermo fans	CrAiGzEE	Wed, 07 May 2003 01:42
	Re: thermo fans	Yeeehah	Wed, 07 May 2003 02:31
	Re: thermo fans	Norbie	Wed, 07 May 2003 03:55
	Re: thermo fans	CrAiGzEE	Wed, 07 May 2003 04:14
	Re: thermo fans	Yeeehah	Wed, 07 May 2003 04:33
	Re: thermo fans	rob_RA40	Wed, 07 May 2003 04:56
	Re: thermo fans	SUPRAGTE	Wed, 07 May 2003 04:58
	Re: thermo fans	ed_ma61	Wed, 07 May 2003 05:43
	Re: thermo fans	mrshin	Wed, 07 May 2003 05:50
	Re: thermo fans	DacBietAE86	Wed, 07 May 2003 07:12
	Re: thermo fans	Stefan	Wed, 07 May 2003 14:44
	Re: thermo fans	SupraPete	Wed, 07 May 2003 07:52
	Re: thermo fans	DacBietAE86	Wed, 07 May 2003 08:41
	Re: thermo fans	Blown86	Wed, 07 May 2003 10:28
	Re: thermo fans	SupraPete	Wed, 07 May 2003 14:25
	Re: thermo fans	SUPRAGTE	Wed, 07 May 2003 08:59
	Re: thermo fans	SupraPete	Wed, 07 May 2003 14:29
	Re: thermo fans	rob_RA40	Wed, 07 May 2003 22:13

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