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Coolant pump from leading manufacturers

  • BOSCH Water pump
  • FEBI BILSTEIN Water pump
  • MAPCO Water pump
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Your Water pump worn out? » Read more about common malfunctions • Repair • Replacement manual

The water pump is the central part of the engine's cooling cycle, responsible for the coolant circulation and ensuring that the engine does not overheat. A water pump failure has fatal consequences. Generally it announces a defect long on beforehand. In addition to the pumping function, the water pump has an additional task: the tensioning of a timing belt or V-belt.

Water pump function

The coolant pump is located right beside the engine and in constant operation. It is driven by a belt or a gear wheel. The coolant pump builds pressure necessary to press the coolant through the engine. The coolant enters the water pump in a cold state. The pump leads the coolant through the engine block by coolant hoses. These hoses conduct the water through the radiator, situated in the front of the car. To enable pressure compensation at variable engine or external temperature, many cars are equipped with an expansion tank. This enables checking and, if necessary, adding coolant. In cars without expansion tank, cooling water is added in the radiator.

Coolant pump defects

Technically, a water pump is a very simple component, consisting of a housing with a shaft running through it. At the end of the shaft sits a wheel, driven by an external belt drive. The shaft has an internal blade wheel, setting the water in motion. The pump's weak point is its gasket, sealing the pomp from the exterior as well as its shaft and its bearing. In order not to compromise its tightness, the shaft is often only equipped with permanent lubrication or mounted with a sealing gasket. No traditional ball bearings are used for a water pump as these cannot be properly sealed. The one-sided pressure by the belt causes wear to the bearing's extremities. The typical symptoms of a defective water pump are:

    - A loud squeaking of the pump - Leakage of the housing
Replacement of a water pump

Replacement of a water pump is not very complicated. If the coolant pump is additionally used as a tensioning element for the timing belt, both components are generally replaced simultaneously on occasion of their regular maintenance. Conversely, it makes sense to replace the belt, when the water pump needs replacement. In many cars, like e.g. the old Opel Corsa A, the water pump is mounted onto the engine with three bolts. After loosening them, the pump can be replaced by a new part.

Costs for a water pump

Engine manufacturers constructed the coolant pump as a wear part. Sooner or later its replacement is due. Manufacturers guarantee the continuous functioning of the engine, even if the used water contains a lot of calcium. In systems where the coolant pump is used as a belt tensioner, it is generally part of a replacement set. Coolant pumps driven by a belt disc are easier to replace. In these systems there is no need to consider the sensitive timing belt with its timing control. In both cases, prices for a new pump start at ca. 30 euro (£26). The most recent generation of water pumps includes variable pumps with their own electric motor. These promise a considerably longer life span than the traditional water pumps. Manufacturers mention a 6-fold increase in life span, which however still needs to be proven. The electronic and variable water pumps have several other benefits: they can be better installed in the engine block and are able to offer adjustable pumping performance. The elective drive and adjustment make the electronic water pumps very expensive.


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Water pumps RIDEX 1260W0007
  • Supplementary Article / Supplementary Info Info 2: without lid
  • Supplementary Article / Supplementary Info: with seal
  • Number of blades/vanes: 8
  • Material: Cast Aluminium
  • Condition:  new
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RIDEX | 1260W0007
£ 27,04
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Coolant pump RIDEX 1260W0043
  • Pulleys: Belt Pulley
  • Operating Mode: Mechanical
  • Impeller Diameter [mm]: 59
  • Water pump impeller material: Metal
  • Supplementary Article / Supplementary Info Info 2: with flange, with bolts
  • Supplementary Article / Supplementary Info: with gaskets/seals
  • Number of blades/vanes: 6
  • Material: Cast Aluminium
  • Diameter [mm]: 56
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£ 21,57
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Engine water pump RIDEX 1260W0105
  • Pulleys: with belt pulley
  • Water Pump Type: for toothed belt drive
  • Operating Mode: Mechanical
  • Impeller Diameter [mm]: 53
  • Supplementary Article / Supplementary Info: with seal
  • Belt Pulley Ø [mm]: 59
  • Heating/Cooling: Metal impeller
  • Number of blades/vanes: 6
  • Material: Cast Aluminium
  • Condition:  new
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RIDEX | 1260W0105
£ 18,37
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Water pump RIDEX 1260W0035
  • Number of Teeth: 19
  • Impeller Diameter [mm]: 64
  • Water pump impeller material: Plastic
  • Supplementary Article / Supplementary Info Info 2: with seal ring
  • Weight [kg]: 0,741
  • Number of blades/vanes: 7
  • Material: Cast Aluminium
  • Seal Material: Elastomer
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£ 23,09
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Water pumps RIDEX 1260W0030
  • Number of Teeth: 23
  • Weight [kg]: 0,76
  • Diameter [mm]: 60
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Coolant pump RIDEX 1260W0180
  • Impeller Diameter [mm]: 67
  • Supplementary Article / Supplementary Info: with seal
  • Belt Pulley Ø [mm]: 52,2
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£ 43,28
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Engine water pump RIDEX 1260W0200
  • Pulleys: with belt pulley
  • Operating Mode: Mechanical
  • Impeller Diameter [mm]: 70
  • Water pump impeller material: Metal
  • Supplementary Article / Supplementary Info: with seal
  • Belt Pulley Ø [mm]: 52
  • Number of blades/vanes: 10
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RIDEX | 1260W0200
£ 23,90
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Water pump RIDEX 1260W0014
  • Number of Teeth: 19
  • Operating Mode: Mechanical
  • Supplementary Article / Supplementary Info: with seal
  • Belt Pulley Ø [mm]: 65
  • Condition:  new
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RIDEX | 1260W0014
£ 27,96
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Water pumps RIDEX 1260W0230
  • Number of Teeth: 23
  • Weight [kg]: 0.725
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RIDEX | 1260W0230
£ 28,59
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Coolant pump RIDEX 1260W0168
  • Number of Teeth: 20
  • Pulleys: with belt pulley
  • Operating Mode: Mechanical
  • Impeller Diameter [mm]: 53
  • Supplementary Article / Supplementary Info Info 2: with water pump seal ring
  • Belt Pulley Ø [mm]: 59
  • Heating/Cooling: Metal impeller
  • Number of blades/vanes: 6
  • Material: Cast Aluminium
  • Condition:  new
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RIDEX | 1260W0168
£ 16,81
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Engine water pump RIDEX 1260W0016
  • Water Pump Type: for toothed belt drive
  • Impeller Diameter [mm]: 73
  • Supplementary Article / Supplementary Info: with seal
  • Belt Pulley Ø [mm]: 74
  • Condition:  new
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RIDEX | 1260W0016
£ 26,70
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Water pump RIDEX 1260W0036
  • Number of Teeth: 27
  • Water Pump Type: for toothed belt drive
  • Impeller Diameter [mm]: 64
  • Supplementary Article / Supplementary Info Info 2: with seal ring
  • Overall Height [mm]: 96
  • Number of blades/vanes: 8
  • Tensioner Pulley Actuation: Mechanical
  • Condition:  new
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RIDEX | 1260W0036
£ 22,66
Condition:  new