2000 - 2004 Kia Spectra L4-1.8L; FWD. 1998 - 2001 Kia Sephia L4-1.8L; FWD. Water Pump. When does water pump need to be replaced?. This can be detected by physically seeing a leak under your car. If the water pump gasket is blown, the coolant can drip out onto the ground.