And my only thought on the burping of the system was if there were trapped air and the fluid was causing a inrush of pressure and the air not escaping the system becoming pressurized and expanding compounding the system pressure. Much like an intensifier, and something had to give. Again just a theory. Fluid viscosity will effect the pumping pressure.
I've installed many racks and pumps and have never had this issue come up. Hell the only vehicle I actually burped properly was a 2001 Ram 2500 4x4 with 5.7 Cummins. It was so heavy in the front we had to jack it up to get the fluid to circulate.
