[Archrms]

The Over Flow Tank is the black canister with the small hose from the expansion tank at the top and the pet cock valve at the bottom. There is a small hole at the top of the tank that spewed out some coolant the other day shortly after start up. I assume that this is the only way for excess coolant to escape the cooling system.

Is the leakage considered normal (even though it was a small amount)? The engine did get up to temp as it idled. I did not take it for a drive until I could locate the source of the leak. I finally traced the coolant leak to the hole at the top, which then got blown around the engine compartment by the fans.

While inspecting the over flow tank, I noticed that the pet cock valve was in the closed position. However, the entire valve rotated when twisted by hand when I checked to see if the fitting was tight. Is there any way to tighten this connection, or is this normal?