Mazda CX-9 Grand Touring 2007 Manual page 41

Install a new O-ring if necessary.
2. Apply clean engine coolant to the O-ring.
3. Install the O-ring.
THERMOSTAT INSPECTION [MZI-3.5]
1. Inspect the thermostat for the following.
WARNING:
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-3.5]
WARNING:
NOTE:
The following procedure "WATER PUMP REMOVAL/INSTALLATION" is
performed after the engine and transaxle component is removed from the
vehicle.
2007 Mazda CX-9 Grand Touring
2007 ENGINE Cooling System (MZI-3.5) - CX-9
During inspection, the thermostat and water are extremely hot
and can cause severe burns. Do not touch the thermostat and
water.
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
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 REPAIR PROCEDURE [MZI-3.5] .)
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.