The two check valves for the cooling system..??
I stumbled upon this today...
"The two valves are there to remove air bubbles from interrupting the flow of coolant in the engine. When they fail, the car will run hot while driving, but will decrease in temperature when stopped. Also the heater will blow only cold air. These are both telltale signs to replace the check valves. As I understand it they are cheap and easy to fix."
Where are these two two check valves for the cooling system? (Photos?)
2008 Redline, 89k miles