check auxillary water pump if not then you must reverse flush the system some kind of blockage
Finally got it sorted out. My brother decided to fix it himself. The previous mechanic that worked on the car apparently tried to lengthen the return hose and used some form of pvc to join the two hoses on the inside. Obviously when the water gets hot the pvc shrink and then restrict the water flow.
check auxillary water pump if not then you must reverse flush the system some kind of blockage
check auxillary water pump if not then you must reverse flush the system some kind of blockage in sytem