Here is how I do it.

Start the car cold put your hand behind the fan and check to see how much air flow there is.

Put a piece of cardboard in front of the radiator to speed the warming process.

When the motor is warm (180+) and the upper and lower hoses are hot as well remove the cardboard.

Now place your hand behind the fan it should be warm and the force of air blowing across your hand should be stronger.

Allen Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first. Life was a little easier when I was just a wrench.