Water Pumps

Description

Improper functioning of the water pump can cause engine damage, so it is important that it is checked systematically.

The engine cooling system stabilises the engine operating temperature by limiting the rise above the expected limits. The coolant is circulated by the water pump, guaranteeing the correct flow at each engine speed.

In many applications, the water pump is controlled by the timing belt. Therefore, its control and any replacement during maintenance to timing control system is extremely important.

Main features of the water pump

The major elements that characterize the quality of Dayco water pump are:

The bearing

• It supports the water pump impeller on one side and the pulley on the other.
• This element must ensure constant smoothness and withstand the loads generated by the system.
• It can be a double ball bearing or a ball bearing (impeller side) and a roller bearing (pulley side).
• The determination of the bearing geometry is made by the engine manufacturer according to the loads generated by the system.

The impeller

• It can be made of synthetic material reinforced with fibreglass, steel or cast iron.
• The profile of the water pump impeller blades is crucial. The blades must ensure proper flow and avoid cavitation effects.
• The design of the impeller is complex as it constantly ensures liquid flow at all engine speeds.

The seal

• Fitted between the impeller and the bearing, it guarantees the sealing of the liquid at all operating temperatures
• The seal prevents liquid from entering the bearing, thus preventing irreversible damage to the water pump.

The pump body

• generally made of plastic or aluminium, depending on the manufacturer’s choice.
• The pump body must guarantee the correct stiffness and geometry of the system.

Discover all the codes of the water pump range by accessing our Dayco Catalog