I have a 2013 G37S coupe that was over heating due to water pump. I replaced the water pump and thermostat and did a pressure test with no leak. After car is running for a while it will start over heating still however if I rev the RPMs it will cool off immediately. No water in oil and it's not smoking. Could my coolant line or radiator have something obstructing it? Had Infinity tech burp the air out of the coolant and finally say he has no idea! Has anyone had this issue and if so, did you get it resolved? Not sure where to go from here. Engine has 198,000 highway miles car was not ran hot for long and has been babied most of it's milage.