Water Pump Questions

[phanatic32212]

I am trying to diagnose my overheating problem. It won't boil over but it runs at about 210. The rad is cool to the touch while the engine is running. I just replaced the cap and the thermostat with a 180 degree but it still runs hot. When I check the pressure on the upper rad hose, it seems like the only pressure I get back is from the rubber hose pushing back. Water pump maybe? How much pressure should be on the top hose? Also what is the measurement for a short and long water pump? Thanks in advance.