As I stated in another thread, I had changed out my fan clutch and condenser fans on my '96 Disco 4.0 because of overheating, which killed the electric fans. After installing the new fans and driving the truck as I've always done, I realized that the fans don't push as much air. I can tell just by the sound their making that the new fans seem weaker than the ones they replaced. I used to be able to hear the fans from the inside of the truck. Now, I have to get out to hear them. The fans are the same model number and I know they are hooked up correctly. Has anyone ever dealt with this issue and if so, any suggestions on what my problem could be? Thanks, in advance.

 

Is each fan getting 12 volts, or did somehow they get wired in series like old fashioned holiday lights? And is polarity correct? You can tell if they are blowing the right way by turn AC on, ignition on but not cranked. With just electric fans running they should suck a paper towel or wimpy plastic bag to the grille, not blow it away.

Also, it is possible to mount main fan reversed, the "cupped" side of the blades goes toward the engine block. Also double check serpantine belt route.

When my D1 starts, the main fan pulls enough air to spin the electric fans slightly, even though they are not on. When they are on at idle, they increase airflow perhaps 30%. Most guys don't have an air flow feet per minute tester, and it is hard to guesstimate with the Mark I palm reader.

 

Thanks, Savannah Buzz. I'll check all those things and get back with result. I don't have an air flow meter, but maybe I can solve it with those other points in mind.