need help asap. 88 TII plastic part that bolts onto the waterpump

[Robert.Niemann...TII]

im not sure if it has the bypass fitting but if i went to a junk yard what year mazda could i pull one until i made it to a mazda dealership. and yes it was the filler neck it just rite where they molded the plastic together its barley leaking but im not chancing a car i just spend 3k for and me drive down the road and it breaks open and i overheat it and screw it up worse..

[RETed]

I would not chance a used one.
Used ones have a chance to be leaking.
I had one tiny crack in mines that you cannot see except for the telltale white residue from coolant drying up.

A brand new one is like $50 with cap, I think.
Cheap insurance.


-Ted