Heater Hose Removal/Installation

WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.

Drain the radiator.
Remove the air cleaner outlet tube.
Remove the heater hoses from between the heater core and the water control valve.

Fig 1: Removing Heater Hoses (2.3L)
Courtesy of MAZDA MOTORS CORP.

Fig 2: Removing Heater Hoses (3.0L)
Courtesy of MAZDA MOTORS CORP.

Fig 3: Removing Heater Hoses (4.0L)
Courtesy of MAZDA MOTORS CORP.
Remove the heater hose from between the water control valve and the water pump.

Fig 4: Removing Water Control Valve To Water Pump Heater Hose (2.3L)
Courtesy of MAZDA MOTORS CORP.

Fig 5: Removing Water Control Valve To Water Pump Heater Hose (3.0L)
Courtesy of MAZDA MOTORS CORP.
On 4.0L engines, remove the nut from the clip.

Fig 6: Removing Nut From Clip (4.0L)
Courtesy of MAZDA MOTORS CORP.
Remove the heater hose from between the water control valve and the water outlet.

Fig 7: Removing Water Control Valve To Water Outlet Heater Hoses (2.3L)
Courtesy of MAZDA MOTORS CORP.

Fig 8: Removing Water Control Valve To Water Outlet Heater Hoses (3.0L)
Courtesy of MAZDA MOTORS CORP.

Fig 9: Removing Water Control Valve To Water Outlet Heater Hoses (4.0L)
Courtesy of MAZDA MOTORS CORP.
Install in reverse order of removal.
1. Lubricate all hoses and fittings.
Fig 10: Tightening Hose Retainer Clip Nut
Courtesy of MAZDA MOTORS CORP.