I have used new Mopar clutch fans on three different occasions but found mine were barely adequate.
Problem is they only turn about 80% shaft speed at idle in heat when you need them most. They
also have clearance problems as you have found out, are very heavy and that weight is out on the
end of the water pump shaft...not good. Lastly they fail and it is very hard to tell.
For best cooling get a new 10,000 rpm flex fan or better still 7 blade mechanical.Make sure it has
as much pitch as you can use.
