It's been a year since a new radiator. Now I am noticing that I have to add about a 1/2 cup of oem coolant every check-up. Back before the radiator burst on a female driver, it seems to hold coolant fine. New upper hose, cap, fan switch, fan resistor and a thermostat housing replaced (all OEM parts). It idles smooth. It may just be a simple problem I did't take into account. Things like:
No sealant on the fan switch. Did not flat down the engine head where thermostat housing meets with the thin o-ring. Did not use new hose clamps. Did not pressure check the new cap. Should compressed air tool be used to test the leakage in the system, like this one below? What is the maximum pressure allowed into the cooling system? Should the system drain first? If compressed up to
90-psi, is it normal if pressure drops to 88-psi overnight? How do I look for this leakage visually? Any ideas greatly appreciated. Rick