I have replaced the seal assemply SPX1600z2 and the housing gasket SWPX3000t and the diffuser gasket SPX1600r twice on my Hayward series 1500 1 1/2 horsepower pool pump. After each replacement, water has continued to leak from the very top of the housing gasket between the seal plate and the motor mounting plate. The housing gasket has never shown any crimps or wear. Do you hve any idea what is causing this leak or recommendations for repair?

Thank you,

John B