Mazda CX-9 Grand Touring 2009 Manual page 1799

If there is any bending, use the end of a flathead screwdriver to straighten fins.
HEATER PIPE AND HOSE COMPONENT REMOVAL/INSTALLATION
1. Remove the battery. (See BATTERY REMOVAL/INSTALLATION [MZI-3.7] .)
2. Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT [MZI-3.7] .)
3. Remove the following parts:
1. Windshield wiper arm and blade. (See WINDSHIELD WIPER ARM AND BLADE
REMOVAL/INSTALLATION .)
2. Cowl grille (See COWL GRILLE REMOVAL/INSTALLATION .)
3. Windshield wiper motor (See WINDSHIELD WIPER MOTOR
REMOVAL/INSTALLATION .)
4. Cowl panel (See COWL PANEL REMOVAL/INSTALLATION .)
4. Remove in the order indicated in the table.
Fig. 27: Identifying Heater Pipe, Hose Component Removal/Installation Order & Torque
Specifications
5. Jack up the vehicle.
6. Under guard (LH) (See CHARCOAL CANISTER, CANISTER VENT (CV) SOLENOID VALVE,
AIR FILTER COMPONENT REMOVAL/INSTALLATION [MZI-3.7] )
2008 Mazda CX-9 Grand Touring
2008 HVAC Basic System - Mazda CX-9