 Radiator Fan Testage |
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 Jul 20 2005, 02:47 PM
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#1
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DSM Tech Wizard  Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214  |
Well, now that I've got the car driving, let's get down to the nitpicky stuff.
I'm not totally sure my radiator fans are kicking on when they're supposed to be. I can turn the A/C on and it turns both of them on but I'd like it to come on when it starts getting hot...like it's supposed to. I do have a 2G aluminum radiator in it currently with the 1G fans rigged up behind it. I'm positive both fans are working because they both kick on when the A/C is turned on. I guess I don't know if the 2G radiator is that much better that it's just running that cool or not (it is a smidge wider and made of aluminum). The stock water temp gauge (yes I know, Autometers are soon to come) is standing straight up and down when at idle usually and sometimes just a hair past straight up and down, never any more than that. Is there a way to test the sensor/sending unit? Thanks Brett -------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Jul 20 2005, 05:10 PM
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#2
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 Eats and sleeps DSM jargin. Group: Members Posts: 1,995 Joined: 27-November 04 From: Yates City IL Member No.: 389 |
I tested mine using this page: http://www.geocities.com/MotorCity/Downs/7678/dsmtests.html
I checked the resistence of the sensor cold and then I let the motor heat up and then very carefully checked the reisistance of the sensor hot. And matched the values to the chart on the page above. Mainly I was just looking to make sure the resistence dropped as the temp went up. -------------------- 92 Eagle Talon TSI AWD "The Black Golfball" How fast can a 14B go???
91 Chevy C1500 "Problem Child" **SOLD** 01 Impala DD 07 Trailblazer Wife's new DD Cars run on blood, sweat, and horsepower... Without the first two, you can't get the last" SOB Racing "Sitting On Blocks" |
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Jul 22 2005, 10:01 AM
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#3
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
Thanks for the info! I'll try testing it tonight.
-------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Jul 22 2005, 10:39 AM
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#4
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 Post Master Group: Members Posts: 626 Joined: 25-September 02 From: Urbana, IL Member No.: 19 |
That sensor has nothing to do with when the fan turns on in a 1G, you need to check the sensor that screws into the radiator. It should be high ohm when cool, and it should go to almost 0 ohms when it gets over 200 degrees or so. If you don't have that sensor, that would explain why the fan doesn't come on by itself.
-------------------- Eric Wort
87 White Buick Turbo 'T' (11.71 @ 116.5, 1.61 60ft, slipping trans) 92 Teal Eagle Talon TSi AWD (burn victim) |
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Jul 22 2005, 11:11 AM
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#5
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DSM Tech Wizard Group: Members Posts: 2,404 Joined: 16-December 03 From: Fletcher/Bloomington Member No.: 214 |
eeewwwww....I didn't know there was a sensor in the radiator itself. I may end up having to buy a brand new 1G radiator (arrrgggg!!! for $150). Does the sensor you're referring to have the white plug-in Wort?
BTW, I think the car got a little hot last night. I was driving it around the block last night (in 97 degree weather) and it got a little hotter than usual. I pulled it back in the garage when I got home, shut it off, and I could hear the coolant boiling in the radiator. Needless to say it scares me a little. I've got more water than coolant in it. -------------------- "I hear he tunes the space shuttle also...and that thing is fast"
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Jul 23 2005, 10:07 PM
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#6
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Post Master Group: Members Posts: 626 Joined: 25-September 02 From: Urbana, IL Member No.: 19 |
Yeah, white seems right. Its the one that screws into the lower passenger side corner of the radiator. You could just wire the fans to a manual switch, or find a place to screw the sensor into the thermostat housing area.
-------------------- Eric Wort
87 White Buick Turbo 'T' (11.71 @ 116.5, 1.61 60ft, slipping trans) 92 Teal Eagle Talon TSi AWD (burn victim) |
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