for my new water pump i got the Water Pump to Water Pump Housing gasket, Water Pump Housing to Engine gasket and a o-ring or a round rubber gasket watevery u wana call it. i went to mazdatrix.com to look at the water pump gaskets and i didnt see the o ring one. where does the o ring goes on the water pump?

 

The o-ring on the actuall pump is sealed I believe and not removable. The only o-ring I know of for the water housing assembly is for the filler cap flange.

 

iono why i got a o ring in the sealed bag with the gaskets then

 

It could be the thermostat o ring.