Can you remove the water pump impeller?
 

My "upgraded" water pump with a metal impeller failed today - bearing failure.
Does anyone know if the impeller can be removed? If so - Is it right or left thread?

My thinking is do my own "upgrade" on a new plastic impeller water pump

You replace the whole pump assembly. The new pumps don't use plastic, they use a nylon reinforced material. No need to go metal.

thanks!
my pulley got damaged in the fail, going to replace with URO aluminum or stick to plastic?

I believe the impellers are a press fit, so there are no threads.