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Location:
Newcastle
Registered:
May 2002
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1g thermo switch
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Mon, 29 March 2004 03:02
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Hi there ,
Does any one know which wire on the 1g you can connect to switch your thermo fan on and off with water temperature?
i think i remember hearing there was one on the water housing??? can anyone confirm, or know which wire it is?
Cheers
Stew
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Location:
Madrid - Spain
Registered:
August 2002
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Re: 1g thermo switch
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Mon, 29 March 2004 03:33
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I am pretty sure that it is onlt the GZ20 gen3's (front sump) that have the thermo trigger. I think it is a blue plug on the thermo housing. The others variants have a different housing and come with a mechanical fan on the engine pulley.
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Location:
Melbourne
Registered:
May 2002
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Re: 1g thermo switch
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Mon, 29 March 2004 08:54
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Um i have not seen a gen 3 to date that has a electronic thermo fan, all 1gs i seen (its a few now) of different varients have manual thermos on them, hence no thermo switch.
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Location:
Madrid - Spain
Registered:
August 2002
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Re: 1g thermo switch
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Mon, 29 March 2004 21:46
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Well you learn something new every day. Mine didn't come with a mechanical fan and it has a different thermostat housing than the ones with mechanical fans. I am still to confirm myself that the blue plug is the fan trigger but I know others have used it with success.
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I supported Toymods
Location:
south of the big smoke
Registered:
May 2002
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Re: 1g thermo switch
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Mon, 29 March 2004 22:55
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gold28, if possible take the switch out put it in boiling water and test for continuity, that should provide tell ya
i have a gt4 radiator im going to swap for the supra radiator, it has one of those thermo switches built in
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Location:
Newcastle
Registered:
May 2002
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Re: 1g thermo switch
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Tue, 30 March 2004 07:28
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thanks for the replies guys....
i think Rod had this set up on his..... i thought that was a gen 3 from a supra....
might give him a call...
Cheers
Stew
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Location:
Melbourne
Registered:
May 2002
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Re: 1g thermo switch
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Tue, 30 March 2004 08:07
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Indeed you learn something new everyday, just reading up on it seems that about the only 1g i havnt looked at is a gen 3 with a front sump all the gen 3s i seen a mid to rear, just out of curiosity wouldnt it be at all possible for a radiator place to place a thread in the radiator itself so you could plug a thermo switch in.
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I supported Toymods
Location:
south of the big smoke
Registered:
May 2002
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Re: 1g thermo switch
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Tue, 30 March 2004 08:36
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the temp plugs are about $12 from toyota
it makes sence why would the 1g need one? it only has the clutch man
how is the little one powered? when ever air con was on?
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Location:
Madrid - Spain
Registered:
August 2002
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Re: 1g thermo switch
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Wed, 31 March 2004 11:25
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Well I checked the thermostat sender for you. It is an open circuit when cold and a closed circuit when hot. I didn't have a master gauge, so I can't tell you what the switch temp is but it is a bit hotter than I set my thermofans at. But then again I am still running the standard RA28 radiator and it does struggle on a really hot day, so I err on the side of conservative with the temps. My thermo fans come on at about 1/3 of the temp gauge, whereas this sender triggers at about 1/2 gauge. Incidently the Gen 3 soarer temp sender is compatable with the RA28 gauge whereas the Gen 2 supra one wasn't. It read too low and needed to be changed to get a reasonable reading. I just used a RA28 sender on the Gen 2 motor.
This is the Gen 2 supra (mid sump) thermostat housing
and this is the Gen 3 Soarer (front sump) thermostat housing.
Notice the blue plug on the lower forward part of the housing. The supra has the same casting, it just doesn't have the sender installed.
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I supported Toymods
Location:
south of the big smoke
Registered:
May 2002
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Re: 1g thermo switch
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Wed, 31 March 2004 11:38
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looks good anthony! i might drill it out and tap it!
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Location:
Newcastle
Registered:
May 2002
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Re: 1g thermo switch
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Wed, 31 March 2004 20:38
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Thanks Anthony,
mine is a gen 3 supra... and is the same as the top picture....
looks like it is aftermarket for me. Just wanted to check that option first.
Cheers
Stew
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Location:
Melbourne
Registered:
May 2002
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Re: 1g thermo switch
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Thu, 01 April 2004 08:43
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AH HA, that pic now all of a sudden makes sense to me, on my motor i have a hole in the same spot, exept mine is tapped and a fitting screwed into it and used as a water feed for my turbo, all the other holes where the pipes used to be were to small for the fittings and hence have been tapped and had a grub screw placed in them.
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