Water Pump
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
The water pump is a component of the engine cooling system and circulated the coolant from each cooling circuit components. This water pump consists of sealing, bearing, pulley (1) and housing (2) and is driven by the drive belt to loose noise to water pump pulley. Water pump apply drain hole cup to cap to prevent coolant leakage for customers. Water pump is not open impeller type but closed plastic impeller type (3) to increase the cooling efficiency.