The expansion tank is an essential part of the engine cooling system, allowing for the expansion and contraction of coolant as it heats up and cools down. The cap is designed to maintain the pressure in the cooling system, preventing the coolant from boiling and ensuring that it circulates properly throughout the engine.
Expansion Tank Cap - PCD500030R is available to buy in increments of 1
Overheating: If the expansion tank cap is not maintaining the correct pressure in the cooling system, the engine may overheat.
Coolant loss: A defective cap can allow coolant to escape from the expansion tank, leading to a loss of coolant and potentially causing damage to the engine.
Low coolant warning: If the coolant level in the expansion tank drops too low, it may trigger a warning light on the dashboard.
Hissing sound: A defective cap may produce a hissing sound, indicating that air is escaping from the cooling system.