ive been noticing my upper rad hose has been getting really swollen when the car warms up, just tonight i got home and took a look and it was swollen like a pig, the lower rad hose gets hot too and the thermostat opens ( was bleeding the coolant last week and could see the coolant flowing to the rad and the fan turns on ). Replaced the rad cap last week as my old one wasnt sealing properly. New rad cap is 13 psi motorad i believe.