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New Generation N62 Engine Chapter 3 P.64

Course Contents/Background Material

Fig. 49: Leakage restraint system in the water pump

The water pump has a leakage restraint system for the functional

leakage from the pump shaft piston ring type seal. The coolant

which escapes through the pump shaft sliding ring seal usually

accumulates here and evaporates through a hold in the leakage

chamber (evaporation area).

If the sliding ring seal is faulty, the leakage chamber fills

completely with coolant. Sliding ring seal leakages can be

detected by monitoring the fluid level in the leakage chamber

(inspection hole)

Index Description

1 Impeller

2 Sliding ring seal

3 Leakage chamber/evaporation space

4 Leakage chamber cover

5 Delivery from the sliding ring seal to the leakage chamber

6 Hub for pulley and viscous clutch

KT-8138

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BMW N62 Series Specifications

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