A few cooling system questions Options

[ActionClaw]

(1995 Toyota Celica ST, 1.8L 7A-FE)

I had some cooling system issues. I believe I may have found and repaired the problem but while looking I noticed a few other things that got me thinking.

How can I confirm that the cooling system fluid is properly circulating?

Some say to run the car with radiator cap off and look for movement/turbulence. I see little to no "flow" or movement (in this or other vehicles). Any movement I do see seems more likely to be caused by engine vibration. What is a better testing method? Is inserting a thermometer into radiator and simply watching for temperature increase sufficient?


How to determine if electric radiator fans are properly functioning?

I've found info regarding other cars that fan operation is controlled by multiple sensors: engine temperature sensor, cruising speed, whether the AC is on or off, etc.

I'm guessing a simple enough test might be to drive the car a while, when assumed hot enough, stop, pop the hood and visually check whether the fan is running but because I was unable to have the emission test done, the car currently can't be legally driven. Will the fans kick on at idle and, if so, approximately how soon after starting (cold)? Suggestions?

Thanks

[travisxcore]

To confirm its circulating you can:
A) Listen to hear if the thermostat opens/closes, its right under the alternator (Its in a cast aluminum pipe that goes to the radiator hose there)
B) Buy some UV dye, run the car for a few and pop off the hot side hose after it cools down and take a UV light
C) Feel/watch the hoses

Is the car running too hot or too cold? Cause it could just be your thermostat. They can get stuck open/closed (they have a bleeder valve in them so a little coolant always flows regardless)

For the fans, turn the car on and let it idle. They'll kick on after a few minutes. Your temp gauge should be about dead center when its at the currect running temp. No need to drive the car around.

This post has been edited by travisxcore: May 15, 2013 - 5:38 PM