Quote:
Originally Posted by RockBit
I have a question about this. If the overflow tube is above the radiator cap, I can see how excess coolant will overcome the cap pressure and be vented to the catch can. I cannot see how coolant can be sucked back into the radiator from the catch can, because the (pressure) radiator cap is closed.
What am I missing?
|
Radiator caps have 2 functions.
- hold pressure until the design pressure is reached
- allow return of coolant when the engine cools, the pressure drops and a vacuum is created.
Check the 1:15 minute mark of this video:
https://www.youtube.com/watch?v=QhLUwsCdM08