Has anyone had this problem? I drive G35 sedan. I flushed my cooling system twice adding a racing thermostat so it runs cooler adding new coolant and burped the system with a spill free funnel. I am so confused because the gauge will sit low until 45 minutes of driving and AC is on. When I reach my destination I look under the hood and I have no leaks and the radiator reservoir is not bubbling up like it's hot. The AC will blow cold as hell while the gauge is pointing to H. Both fans are running. What is weird is that when the engine is cool and I start the car the fans kick on right away. I believe the fans are supposed to kick on then car reaches normal tempature. Is there still air trapped in my cooling system or something might be wrong with my fan. If anyone had this experience please let me know. Thanks.

 

You could try to burp the system again. Open the rad. Cap and let the car idle till it's warm. Like 15 min or so. I dunno about the thermostat you put in, but maybe that's the issue. And going with a cooler aftermarket thermostat could cause more issues. If the car doesn't get to it's normal operating temp, weird things can happen.

 

What were you hoping to accomplish with the racing thermostat?

 

Remove that thermostat and replace it with the proper one from the Infiniti parts department.
I find it absolutely amazing how many inexperienced Infiniti owners can screw up the the operation of their vehicles by using crappy non OEM parts.
Why would anyone use a thermostat designed for racing in a vehicle that is not racing daily?

Telcoman

 

I'm just curious how many temperatures the gauge measures.