Percolation? Heat soak? Don't drive during summer??

dartfreak75 said
Bullshit that's why you have a fan! The fan moves air across it! It doesn't matter where the car is! In a garage or not the fan moves air through the radiator.

A fan that's recycling hot air from a garage isn't going to cool the radiator as well as a fan moving cool outside air that's cooler.
Pretty obvious..