Mazda CX-9 Grand Touring. Manual - part 146

1. Disconnect the negative battery cable.  

2. Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT [MZI-3.7].)  

3. Remove the air cleaner and fresh air duct component. (See INTAKE-AIR SYSTEM 

REMOVAL/INSTALLATION [MZI-3.7] .)  

4. Remove in the order indicated in the table.  

5. Install in the reverse order of removal.  

6. Refill the engine coolant. (See ENGINE COOLANT REPLACEMENT [MZI-3.7].)  

7. Inspect for engine coolant leakage. (See ENGINE COOLANT LEAKAGE INSPECTION [MZI-3.7].) 

Fig. 15: Identifying Thermostat Cover, Thermostat & Torque Specifications 
Courtesy of MAZDA MOTORS CORP. 

THERMOSTAT INSTALLATION NOTE 

1. Install the thermostat into the thermostat case with the jiggle pin at the top. 



When you are sure all the pressure is gone, press down on the cap 
using the cloth, turn it, and remove it.  

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE Cooling System (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 9:57:25 AM

Page 15 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 16: Identifying Jiggle Pin 
Courtesy of MAZDA MOTORS CORP. 

O-RING INSTALLATION NOTE 

1. Clean and inspect the O-ring. 



Install a new O-ring if necessary.  

2. Apply clean engine coolant to the O-ring.  

3. Install the O-ring.  

THERMOSTAT INSPECTION [MZI-3.7] 

1. Inspect the thermostat for the following. 



The valve should not open under normal temperature.  



Opening temperature and valve lift 



If there is a malfunction, replace the thermostat.  

Thermostat initial-opening temperature 79.5-83.3°C {175.2-181.9°F}  

Thermostat full-open temperature 94.5°C {202.1°F}  

Thermostat full-open lift More than 8.1 mm {0.32 in}  

WATER PUMP REMOVAL/INSTALLATION [MZI-3.7] 

WARNING:



During inspection, the thermostat and water are extremely hot 
and can cause severe burns. Do not touch the thermostat and 
water.  

WARNING:



Fuel vapor is hazardous. It can very easily ignite, causing serious 
injury and damage. Always keep sparks and flames away from fuel.  



Fuel line spills and leakage are dangerous. Fuel can ignite and cause 

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE Cooling System (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 9:57:25 AM

Page 16 

© 2005 Mitchell Repair Information Company, LLC. 

1. Drain the engine oil. (See ENGINE OIL REPLACEMENT [MZI-3.7] .)  

2. Remove the engine and transaxle component. (See ENGINE REMOVAL/INSTALLATION [MZI-

3.7] .)  

3. Secure the engine and transaxle component using a hoist and the SST .  

4. Remove the dynamic chamber and throttle body as a single unit. (See INTAKE-AIR SYSTEM 

REMOVAL/INSTALLATION [MZI-3.7] .)  

5. Remove the ignition coils. (See IGNITION COIL REMOVAL/INSTALLATION [MZI-3.7] .)  

6. Remove the dipstick.  

7. Remove the power steering oil pump drive belt. (See DRIVE BELT REMOVAL/INSTALLATION 

[MZI-3.7] .)  

8. Remove the power steering oil pump. (See POWER STEERING OIL PUMP 

REMOVAL/INSTALLATION .)  

9. Remove the timing chain component. (See TIMING CHAIN REMOVAL/INSTALLATION [MZI-

3.7] .)  

10. Remove in the order indicated in the table.  

11. Install in the reverse order of removal.  

12. Start the engine and: 

1. Inspect the runout and contact on the pulley and belt.  

2. Inspect for engine oil, engine coolant, ATF, power steering fluid and fuel leakage.  

3. Verify the ignition timing, idle speed and idle mixture. (See ENGINE TUNE-UP [MZI-3.7] .)  

4. Engine accessories operation. 

serious injures or death and damage. Fuel can also irritate skin and 
eyes. To prevent this, always complete the "Fuel Line Safety 
Procedure". (See BEFORE SERVICE PRECAUTION [MZI-3.7] .)  



Continuous exposure to USED engine oil has caused skin cancer in 
laboratory mice. Protect your skin by washing with soap and water 
immediately after working with engine oil.  

NOTE:



The following procedure "WATER PUMP REMOVAL/INSTALLATION" is 
performed after the engine and transaxle component is removed from the 
vehicle.  

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE Cooling System (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 9:57:25 AM

Page 17 

© 2005 Mitchell Repair Information Company, LLC. 

Fig. 17: Lifting Engine With Engine Jack 
Courtesy of MAZDA MOTORS CORP. 

13. Perform a road test. 

Fig. 18: Identifying Upper Timing Chain Guide, Water Pump, Gasket & Torque Specifications 
Courtesy of MAZDA MOTORS CORP.

 

2008 Mazda CX-9 Grand Touring 

2008 ENGINE Cooling System (MZI-3.7) - Mazda CX-9

  

Microsoft 

 

Sunday, November 15, 2009 9:57:25 AM

Page 18 

© 2005 Mitchell Repair Information Company, LLC.