Save Your Knuckles With Air Power
An electric impact wrench is a heckuva lot better than a hand wrench. But seriously, nothing beats raw air power and air tools when you want to make quick work of just about any auto or small-engine repair.
But first you need a real air compressor like the one shown, not some wimpy $99 2-gallon unit designed to run a nail gun. And don't get suckered by horsepower ratings; they don't mean anything. Instead, look for a compressor with at least a 15- to 20-gallon tank and a minimum output of 5 cfm at 90 psi. That'll power just about any air tool you want, except a sandblaster. For that, you need at least 10 cfm, and a rich uncle.