Goss Coolant Expansion Tank - CB162

Coolant bottles are an essential component of a vehicle’s cooling system. Their primary function is to storeexcess coolant that expands when the engine heats up and then return it to the cooling system when theengine cools down, ensuring the system remains properly filled and sealed.There are two main types of coolant bottles: pressurised and non-pressurised. Pressurised tanks, alsoknown as expansion tanks, are the high point of the engine cooling system ensuring an easy coolantbleeding process. These systems require the tank and cap to have a perfect seal. These tanks form part ofthe closed loop cooling system. Non-pressurised tanks, also known as overflow tanks, serve as an externalreservoir, allowing any expansion that happens in the sealed cooling system to be caught and then returnedto the system once cool. Heat, age, incorrect pressure or oil contamination can cause the bottle to becomediscoloured, brittle, contaminated with sludge or even break.Periodic inspections of the coolant bottle, its markings and the cap can ensure the cooling systemremains properly filled and in good working order. A failing coolant bottle can lead to coolant loss andengine overheating.