Great work depicting how to build one of these tools for the cooling system--I'm adding this little tip
though--once you finish all the work your doing--have available in your list of itmes at hand a can
of Dry Teflon Spay Wax--this can be purchased at Lowes. When putting the fan back on the water pump
spray some of the lube on the water pump nut and also on the nut on the fan. When you get it back on and then tightened, the next time you remove the fan, you can just use the wrench--there will be no need
for the tool anymore.