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Yes, stop leak turns into a thick substance to plug any leaks, when it ends up in the overflow bottle it turns into sludge there.
An overflow tank is a bottle that holds coolant that expands and leaves the radiator under driving conditions. The Coolant will go back into the radiator as needed.
in the overflow tank
how do I replace my 2005 fiesta expansion header tank
The overflow tank is either cracked or its overheating and leaking from the cap
Its either in the coolant overflow tank or in the side of the radiator
The overflow tank for coolant will "boil" if there is air getting in the coolant chamber. This can be a head gasket going bad.
Add it in the overflow tank up to the max line.
Usually a blown head gasket.
coolant overflow/reservoir tank
Yes. There should always be some coolant in the overflow tank. Its level should rise when the engine warms up, and it should go back down when the engine cools.