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Q: What color is sludge in a coolant overflow tank?
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Why is there sludge in coolant overflow tank?

Coolant is old.


Does using radiator stop leak cause the coolant in the overflow tank to look like sludge?

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.


What is an overflow tank?

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.


How do you add coolant to your 2001 Kia Spectra?

in the overflow tank


How do you replace the coolant overflow tank?

how do I replace my 2005 fiesta expansion header tank


Where is the low coolant sensor on the 1999 Z34?

Its either in the coolant overflow tank or in the side of the radiator


What does it mean when coolant in overflow tank is low and is leaking antifreeze from that side of the car?

The overflow tank is either cracked or its overheating and leaking from the cap


Why is your antifreeze tank boiling?

The overflow tank for coolant will "boil" if there is air getting in the coolant chamber. This can be a head gasket going bad.


How do you add coolant?

Add it in the overflow tank up to the max line.


Oil in coolant overflow tank?

Usually a blown head gasket.


What is the white container connected to radiator?

coolant overflow/reservoir tank


Is there always coolant in the overflow 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.