Alright, so I'm putting an electric fan in my 86.5 NA supra. I accidentally broke the stock mechanical fan while swapping the engine and happened across an electric fan while looking for a replacement. So I figured why not. However. The mount doesn't fit my car. So- big deal. I'm going to cut and weld up a mount so that it will fit. And I'll brush it and make it look nice. The only thing that I still have yet to solve is the matter of the placement of the temperature switch. I'm getting a screw-in switch, mainly because I don't trust a sensor to be accurate that isn't touching coolant, and I don't have any extra slots on the thermostat housing on the engine side of the thermostat. I could screw it into the radiator side, but in the case of a stuck thermostat things could get particularly nasty. What I'd like to know is if anyone has ever replaced the pipe/cover that bolts on to hold the thermostat in place with another one that moves the thermostat closer to the radiator (not out towards the front, but to the right farther along the path of the hose)? If anyone has tried this, give me a heads-up. Thanks!
My electric fan for my ge
- Thread starter jazzsaxman1988
- Start date
I doubt anyone has done that. Also...if your thermostat ever got stuck, the coolant won't be flowing anyway, and the fan not coming on will be the least of your problems.
I believe you are 'thinking' too hard, in a negative way. This wastes time and causes you more work than needed.
I have been using a temp sensor mounted in the radiator fins for 3 years, without fail. I also wired up an 'over-ride' switch where one of the coin holders was on the dash, lefy of the steering wheel.
I also wired in an LED light to know when the fan is on.
I believe you are 'thinking' too hard, in a negative way. This wastes time and causes you more work than needed.
I have been using a temp sensor mounted in the radiator fins for 3 years, without fail. I also wired up an 'over-ride' switch where one of the coin holders was on the dash, lefy of the steering wheel.
I also wired in an LED light to know when the fan is on.
supra88boy said:
While that works, it isn't as efficient as wiring it to a switch. When it's always on, it cools until the thermostat closes again, then heats back up until the thermostat opens. This results in a freaking out thermostat. It'll work, but not as well as it could.
mrnickleye said:
I like the idea of an LED indicator. I might try that. I really want it to be screwed in on the engine side of the thermostat. So I may fabricate this anyways. We'll see, lol. Thanks for the input guys!
you cant move the thermostat from its location do to the fact that it blocks the internal by-pass when it opens. if the by-pass port is not blocked when the thermostat is open, you run a very high risk of overheating the engine because a portion of the coolent will not go though the radiator.
Just put the switch in the housing after the thermostat. if the thermostat does stick at somepoint, it is not going to make a difference if the fans are on or off cause no water is going to be flowing through the radiator anyways. The other thing is it will be close enough that the heat will radiate through the thermstat and heat the water on the other side and will end up turning the fan on anyways. I know this from experiance.
Just put the switch in the housing after the thermostat. if the thermostat does stick at somepoint, it is not going to make a difference if the fans are on or off cause no water is going to be flowing through the radiator anyways. The other thing is it will be close enough that the heat will radiate through the thermstat and heat the water on the other side and will end up turning the fan on anyways. I know this from experiance.
Are you sure it blocks the internal bypass? Because I just took and extra thermostat housing I have and a thermostat and torched it until it opened, and looked and it doesn't appear that it would be capable of sealing anything off. Are you entirely sure about that?
cjsupra90 dude.....the thermostat does not seal off the by-pass. It always flows thru it. And I'm positively sure about this.
In fact, I tied in a very large tranny cooler to those 2 ports, and sandwiched it between the ac condensor and the radaitor. This gave me about 40% more radiator for about $50. (Its only 110* outside today).
cjsupra90...says..."The other thing is it will be close enough that the heat will radiate through the thermstat and heat the water on the other side and will end up turning the fan on anyways. I know this from experiance."
I say...
Even if the fans came on, it won't matter if there is no coolant flowing due to a stuck closed thermostat.
--------------------------------------------------------
jazzsaxman...says...."When it's always on, it cools until the thermostat closes again, then heats back up until the thermostat opens. This results in a freaking out thermostat."
Sorry but....
Once the thermostat is hot enough to fully open, it does not 'close' again while the engine is running. If anything, in very chilly weather, it may partially close, but never anywhere near fully closed.
(This might only happen in outside temps of way below freezing, and then only if you did not have your heater fan on to carry away the engine heat).
By the way, I run a 180* thermostat in the hot months, and a 195* (factory rated) one in the winter.
The thermostat was designed to KEEP the engine at a pre-determined temperature. That temp is whatever the thermostat is rated.
PS...not intending to flame anyone, just want to help every one by sharing 23 years of ASE Master Tech experiences. 4 at Toyota.
In fact, I tied in a very large tranny cooler to those 2 ports, and sandwiched it between the ac condensor and the radaitor. This gave me about 40% more radiator for about $50. (Its only 110* outside today).
cjsupra90...says..."The other thing is it will be close enough that the heat will radiate through the thermstat and heat the water on the other side and will end up turning the fan on anyways. I know this from experiance."
I say...
Even if the fans came on, it won't matter if there is no coolant flowing due to a stuck closed thermostat.
--------------------------------------------------------
jazzsaxman...says...."When it's always on, it cools until the thermostat closes again, then heats back up until the thermostat opens. This results in a freaking out thermostat."
Sorry but....
Once the thermostat is hot enough to fully open, it does not 'close' again while the engine is running. If anything, in very chilly weather, it may partially close, but never anywhere near fully closed.
(This might only happen in outside temps of way below freezing, and then only if you did not have your heater fan on to carry away the engine heat).
By the way, I run a 180* thermostat in the hot months, and a 195* (factory rated) one in the winter.
The thermostat was designed to KEEP the engine at a pre-determined temperature. That temp is whatever the thermostat is rated.
PS...not intending to flame anyone, just want to help every one by sharing 23 years of ASE Master Tech experiences. 4 at Toyota.
cjsupra90 dude.....the thermostat does not seal off the by-pass. It always flows thru it. And I'm positively sure about this.
In fact, I tied in a very large tranny cooler to those 2 ports, and sandwiched it between the ac condensor and the radaitor. This gave me about 40% more radiator for about $50. (Its only 110* outside today).
cjsupra90...says..."The other thing is it will be close enough that the heat will radiate through the thermstat and heat the water on the other side and will end up turning the fan on anyways. I know this from experiance."
I say...
Even if the fans came on, it won't matter if there is no coolant flowing due to a stuck closed thermostat.
--------------------------------------------------------
jazzsaxman...says...."When it's always on, it cools until the thermostat closes again, then heats back up until the thermostat opens. This results in a freaking out thermostat."
Sorry but....
Once the thermostat is hot enough to fully open, it does not 'close' again while the engine is running. If anything, in very chilly weather, it may partially close, but never anywhere near fully closed.
(This might only happen in outside temps of way below freezing, and then only if you did not have your heater fan on to carry away the engine heat).
By the way, I run a 180* thermostat in the hot months, and a 195* (factory rated) one in the winter.
The thermostat was designed to KEEP the engine at a pre-determined temperature. That temp is whatever the thermostat is rated.
PS...not intending to flame anyone, just want to help every one by sharing 23 years of ASE Master Tech experiences. 4 at Toyota.
In fact, I tied in a very large tranny cooler to those 2 ports, and sandwiched it between the ac condensor and the radaitor. This gave me about 40% more radiator for about $50. (Its only 110* outside today).
cjsupra90...says..."The other thing is it will be close enough that the heat will radiate through the thermstat and heat the water on the other side and will end up turning the fan on anyways. I know this from experiance."
I say...
Even if the fans came on, it won't matter if there is no coolant flowing due to a stuck closed thermostat.
--------------------------------------------------------
jazzsaxman...says...."When it's always on, it cools until the thermostat closes again, then heats back up until the thermostat opens. This results in a freaking out thermostat."
Sorry but....
Once the thermostat is hot enough to fully open, it does not 'close' again while the engine is running. If anything, in very chilly weather, it may partially close, but never anywhere near fully closed.
(This might only happen in outside temps of way below freezing, and then only if you did not have your heater fan on to carry away the engine heat).
By the way, I run a 180* thermostat in the hot months, and a 195* (factory rated) one in the winter.
The thermostat was designed to KEEP the engine at a pre-determined temperature. That temp is whatever the thermostat is rated.
PS...not intending to flame anyone, just want to help every one by sharing 23 years of ASE Master Tech experiences. 4 at Toyota.
im very glad theres somebody here that know just about everything about our cars. very wise, and humble person we should all look up to, and listen to. im jelous of you mrnickleye, working for Toyota for all thoes years and your still nice enough to be here helping us. Thank you!
mrnickleye said:
Thats what I said, about how cares if the fans come one if the thermostate is stuck closed.
Also, you are right and I was wrong about the thermostat blocking th bypass. I was picturing in my head the thermostat from my 1UZ V8 which does block the bypass fully and will over heat the motor in hot weather if the bypass stays open while the thermostat is open. I just delt with this not to long ago in a costumer's SC400 that he put the wrong thermostat in it that had no bypass blocking plate attached to it.
he said it was 110 degrees outside toda. He didn't tell you it was 8:30 am. I love the desert,it so rocks!