Water Pump Removal / Installation - 4.0L

WARNING: This page is about a different car, the 2007 Mazda B4000. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect negative battery cable. See BATTERY DISCONNECT .
Drain engine coolant. See ENGINE COOLANT REPLACEMENT - 4.0L .
Remove cooling fan blade and clutch. See COOLING FAN AND CLUTCH REMOVAL / INSTALLATION - 4.0L .
Remove the bolts and position the fan shroud out of the way.
Remove the drive belt. See DRIVE BELT REMOVAL / INSTALLATION - 4.0L .
Remove the belt idler pulley.

Fig 1: Belt Idler Pulley With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Slide the water bypass hose clamp back.

Fig 2: Sliding Water Bypass Hose Clamp Back
Courtesy of MAZDA MOTORS CORP.
Disconnect the heater hose at the water pump.
1. Release the clamp.
2. Remove the hose.
Fig 3: Heater Hose
Courtesy of MAZDA MOTORS CORP.
Disconnect the lower radiator hose at the water pump.
1. Release the clamp.
2. Remove the hose.
Fig 4: Disconnecting Lower Radiator Hose At Water Pump
Courtesy of MAZDA MOTORS CORP.
Remove the water pump pulley.

Fig 5: Water Pump Pulley Bolts With Torque Specification
Courtesy of MAZDA MOTORS CORP.
Remove the water pump.

Fig 6: Water Pump Bolts With Torque Specification
Courtesy of MAZDA MOTORS CORP.
Clean all the sealing surfaces.
CAUTION:
- Use care when scraping the water pump-to-engine block mating surfaces. Gouges in the aluminum could form leak paths.
To install, reverse the removal procedure.
- Fill radiator with specified amount and type of engine coolant and bleed the cooling system. See ENGINE COOLANT REPLACEMENT - 4.0L .