Anyone give me an easy way to know if the oil cooler fan comes on? I dont think i will hear it over my exhaust but want to make sure it is working. Supposed to come on with thermostat set at 180 degrees
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You'll hear it. I have an "open pipe" position on my exhaust, and I can hear it.
Either mine doesnt work or my motor didnt get to 180 degrees which doesnt seem right
Most likely, it didn't get to 180 degrees (unless you were driving hard on a freeway for 10-15 minutes or better.
^X2
The temp gauge is going to go more than 1/2 way before you're even close. It's not hot enough to bring the fan on, even in FL.
Too cold is just as bad as too hot, in it's own way.
Drive the car to get the engine warm enough to trigger the thermostat fan on the oil cooler. On your temp gauge (above your Fuel gauge) the indicator should be at least past the halfway mark.
Turn engine off, then turn the ignition key just enough for gauges to come on (but not turn over the engine). If the engine got warm enough to trigger the thermostat you should be able to hear the fan whirring. 
Great tip. Tried it earlier. Seemed like gauge was hovering at half way but when i tried that it didnt kick on. Must have just not gotten hot enough!
Just for reference when my guage is at the half way mark I'm well over 200 degrees. I would seriously consider getting a dipstick thermometer. You damn sure don't want the problems associated with overheating your new motor.
I'm finishing off the wiring for my front mounted oil cooler/fan and I want to know when my fan is running, so I'm going to run a wire from the relay up under the dash and connect it to a small LED light.
TRD, our oil temperature gauges often give inaccurate readings. I'd recommend purchasing a dipstick thermometer, as Rusty mentioned, for an accurate comparison. When I compared my dipstick thermometer to my dash gauge I found that my dash gauge was WAY out. My dash read 180, but the dipstick thermometer read 210 degrees! 
After a talk with a tech person at North Hollywood Gauges I found out I had the wrong temperature sending unit.
Here's a link to the dipstick gauge: http://mainelycustombydesign.com/1dipstick2.html
If you purchase one remember to check its accuracy by putting it in a pot of water and heating it to a boil. I've heard that some of these gauges can be off.