11-03-21, 12:54 PM
(11-03-21, 12:29 PM)Decoke Dave link Wrote: Daft question time. The expansion tank simply has a push on rubber plug/cover, how is the “engine up to temperature, thus full pressure” isolated from the cooling system in a fashion that the expansion tank can top the cooling system up without its contents simply being pressurised thus blown out everywhere! A car expansion tank has a cap which retains pressure on a car?
The expansion tank hose is usually fitted in the filling neck somewhere if the pressure builds beyond the either a built in pressure valve or the filling cap (spring) it will slightly, open the valve/cap and allow the pressure (coolant) out/in into the expansion tank.
Later