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WK Series (Ball-ball Type)
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 WK Series (Ball-ball Type)

The water pump is the heart of the automotive cooling system, typically a belt-driven centrifugal pump. The pump circulates coolant throughout the system while the engine is running. If the drive belt fails, the water pump will not function. It is one of the reasons it’s so important to always check the status of the belt during maintenance. 

The water pump uses centrifugal force to send coolant to the outside while it spins, drawing coolant from the centre continuously. The pump inlet is located close to the centre so that coolant returning from the radiator strikes the pump vanes, which then fling the coolant to the outside of the pump to enter the engine. Coolant leaving the pump first flows through the engine block and cylinder head, then through the radiator and finally back to the pump. 


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SélectionnerEnquêteDomestic modelsNSKFAGDimension (inch)
UNEBCréD1S1D2S2
WIB1938120A0S - WK6474-2D 4.74 1.02 1.6 0.7485 - - 0.629 1.54
WIB19381230S - WK6484-1 4.85 1.22 1.5 0.7485 0.629 0.55 0.629 1.3
WIB19381250S - WK6493 4.93 1 1.8 0.7485 - - 0.629 1.65
WIB1938126A0S 8858320S2 WK6495 4.95 1.22 1.61 0.7485 0.6287 1.08 0.6287 1.47
WIB19381270S 8858110S2 WK6500-2 5 1.24 1.64 0.7485 - - 0.6287 1.5
WIB1938127A0S 885775SC0S WK6500B 5 1.05 1.83 0.7485 0.6275 0.35 0.6295 1.72
WIB19381280S 8858690S WK6501-3B 5.02 1.22 1.67 0.7485 0.6267 0.54 0.6287 1.55
WIB19381320S 8858520S2 WK6520B 5.2 1.17 1.9 0.7485 0.6267 0.47 0.6287 1.7
WIB1938135B0S - WK6530B 5.3 1.25 1.93 0.7485 0.629 0.28 0.629 1.74
WIB19381350S 8857810S2 WK6531 5.31 1.47 1.71 0.7485 - - 0.6287 1.61
WIB1938135A0S - WK6531-3 5.31 1.18 2 0.7485 - - 0.629 1.9
WIB19381360S 8857350S2 WK6534 5.34 1.26 1.96 0.7485 - - 0.6287 1.86
WIB19381370S 8857370S WK6537-1B 5.37 1.43 1.82 0.7485 0.6267 0.49 0.6287 1.71
WIB1938137A0S 8858100S2 WK6538 5.38 1.45 1.81 0.7485 0.6287 1.3 0.6287 1.67
WIB1938137B0S 8858700S WK6538-2B 5.38 1.59 1.67 0.7485 0.6267 0.56 0.6287 1.55
WIB19381400S 8858210S WK6550B 5.5 1.4 1.97 0.7485 0.6267 0.61 0.6287 1.88
WIB19381410S 8857200S2 WK6553-2 5.54 1.56 1.85 0.7485 - - 0.6287 1.72
WIB19381420S 8857190S2 WK6558 5.58 1.73 1.72 0.7485 - - 0.6287 1.61
WIB1938142A0S 8858150S2 WK6559-2 5.59 1.25 2.21 0.7485 - - 0.6287 2.04
WIB1938142B0S 8858510S2 WK6560 5.61 1.55 1.93 0.7485 0.6267 1.41 0.6287 1.79
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