I have been getting cavitation during take off with my 96 GTX, I will rev to about 6k and not accelerate untill I get above plane. I read it maybe the wear ring but I measured it and the clearance is less then the 1.0mm the book says. I also read that it maybe a sealant ring between the pump and the housing. But the part diagram shows no gasket there. So I am not sure what I need to do.