Purpose of the rubber in the image in a water pump

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I would like to know the purpose of the rubber in this water pump and a metal piece behind it in this water pump of a vehicle. The water pump is located in the engine near the distribution belt. Best Regards

There are two version of the rubber : one with a hole or without it.
 

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  • #2
It seems to be a flat pulley.
 
  • #3
I think the black flat pulley is metal, while the smaller, hollow rubber crescent, that clips onto the casting, has some other purpose.

Maybe when the cover is fitted, it changes the airflow in the belt chamber, that helps cool the rubber stepped belt.
 
  • #4
My guess is that it's a 'wiper' for the timing belt. I've never seen a water pump driven by the non-toothed side of a timing belt (like this) - the rubber piece may be an attempt to avoid slippage between the belt and pump.
 
  • #5
Insufficient information.
The geometry of the belt path makes a big difference.
Is this an engine timing belt or a serpentine belt?

It would help if we knew the make, model, and year of the engine.
 
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  • #6
May be something for avoiding leakings ?
Anybody have pump images in detail ? Any holes for water leaking in the pump ?
 
  • #7
Baluncore said:
Insufficient information.
The geometry of the belt path makes a big difference.
Is this an engine timing belt or a serpentine belt?

It would help if we knew the make, model, and year of the engine.
It's an engine timing belt.
the pump is for a motor k9k type
Used by Reanault, Dacia and others.
 
  • #8
https://en.wikipedia.org/wiki/Renault_K-Type_engine#K9K_dCi
The K9K is an automobile engine family – a group of straight-4 8-valve turbocharged Diesel engines co-developed by Nissan and/or Renault, and also Daimler AG (where it is called OM607).

I do not see the rubber crescent on the replacement water pumps, so I guess it is a support for the timing belt cover, designed to reduce cover vibration noise. The crescent would be held in place by the cover.

Was the rubber crescent fitted on the original, and on the replacement water pump ?
 
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What is the purpose of rubber in a water pump image?

The rubber in the image of a water pump typically serves as a seal or gasket. It helps prevent water leaks by providing a tight seal at the joints and connections within the pump, ensuring efficient operation and preventing water from escaping the system.

How does rubber improve the efficiency of a water pump?

Rubber components in a water pump reduce friction and wear between moving parts, which can enhance the pump's efficiency. By creating an effective seal, rubber parts also minimize energy loss, ensuring that the pump operates at optimal performance levels.

Is the rubber used in water pumps resistant to corrosion?

Yes, the rubber used in water pumps is typically designed to be resistant to corrosion, chemicals, and water. This is crucial because it ensures the longevity and durability of the pump, especially when it is used in environments with corrosive fluids or varying pH levels.

Can the rubber in water pumps withstand high temperatures?

Rubber components in water pumps are generally made from materials like EPDM or Nitrile, which can withstand high temperatures. This property is important for maintaining the integrity of the pump’s seal under different operating temperatures, thereby preventing leaks and other failures.

How often should the rubber components in a water pump be replaced?

The frequency of replacement for rubber components in a water pump depends on several factors, including the type of pump, the operating conditions, and the quality of the rubber. Generally, it is recommended to inspect these components regularly and replace them if you notice signs of wear and tear, such as cracks, brittleness, or leaks, to ensure continuous and reliable pump performance.

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