Need a little help! My 4runner started running hot when it is idling(for a period of time) and cools when car is moving. It only happen twice. I check the coolant level and had to add about a half gallon of coolant. The thermostat seems to be working but I will use my temp gun I have at work to see what temp is going in and out of the radiator. Wondering if the low coolant level could be the cause or if it could be something else