Water pump seal?


YOU might try 3m yellow super weatherstrip and gasket adhesive. just a few spots and let it get tacky. please post if it is a round o ring or does it look like it is molded to fit.
usually if it keeps popping out it is either to big or to small.
if it is an o ring you might try an independent automatic transmission shop to see if they might have one that fits. it would have to be the wright thickness to work.
herman
 
I always use a touch of grease to hold a o-ring in place if needed

this is also a good idea, however the o ring has got to fit very well for it to work.