Where did you mount the temperature probe? I bought a controller with the push in probe through the radiator fins.

 

Installed a Flex-Alite #31147 on the upper drivers side below the radiator inlet. Because of the diameter of the probe didn't insert it competely through the radiator per instructions for fear of damage. Taped the exposed end with thick electrical insulating tape with a cover of friction tape.
Seems to function well, (adjusted to turn fan on @ 210 Deg. turns off @ 170 per my gage) but time will tell.

 

It should be mounted closest to the upper radiator hose.

With a 195 degree stat I'd start with 215 on and 190 off.

I say this, but until I hook up my OBDII reader and watch the water temps, I'm not 100% sure where I'll set mine.

 

Well I tried putting the probe through the radiator and the fans never turned on, so I felt the radiator and only the bottom part of the radiator gets hot. Coolant was definitely circulating, but the top of the radiator was cool and the bottom was cold, but the metal on the sides of the radiator was the hottest so I attached the probe so that it is touching that outer metal. Is this normal? Do I have a block in the radiator? I can feel a good amount of air coming from the front of the truck through the radiator but the temp gauge still sits a little under 210*.

 

If the temp gauge sitsunder 210 as hot is it is around here, sounds good. The fins have a lot of air flow to read off of also.

 

I believe our radiators are the cross flow design. (On the cross flow radiator design, the tanks are located on the sides of the radiator's core, allowing the pump to push the coolant across the core from right to left.)
A radiator shop with an infra-red point & shoot temp. measuring instrument measured the inlet to my radiator(drivers side upper) @180 Deg. F and the outlet of the radiator (passanger side lower)@ 140 Deg.F on a hot summer day when the truck had been idiling for some time. I could not tell the difference with my hand.
http://www.radiator.com/article-radiator-101.html

 

yes,the thermowill pick up the temp being pushed through the fins.

Just out of curiousity, have you ever seen the fans come on? Do you have it wired correctly? Do you havethe thermoconnected to the correct posts on the fan controller? What controller are you running?

Not throwing stones here, just trying to help troubleshoot. I just hooked up fans 2 weeks ago and trying to track down possible mistakes. If the controller has a variable temp stting try setting it lower with the truck at running temp and see if it turns on.

 

The fans will turn on with no problem. The fan controller I have is:
http://store.summitracing.com/partde...p;autoview=sku
I've got it set up so that the controller sets off 2 relays that each control 1 fan. I've got a dual fan setupfrom an 05 monte carlo and when the truck gets up to temp, both fans turn on at the same time. If you feel in front of the A/C condensor, all you can feel is air getting sucked through. However, I've noticed that the bottom of the radiator is still pretty hot and the top of the radiator is pretty cool. The shroud is placed about 3" away from the bottom of the radiator and 1" from the top. Should I move the shroud farther down on the radiator?

 

sorry i can't answer your question, but make sure and update us on how those monte carlo fans work out for you. i've been eyeballing the dualfans on my grand prix & it looks like they'd work pretty well.

 

they should be ok.. i think the general rule for fans (iirc) is that as long as they cover 60 - 75% of the surface .. they should be effeciant enough.. stick your hand behind the fans, between the motor and the fans (becarful) and if you feel really hot air wizzin by your hand then you should be all set.