Mazda CX-9 Grand Touring 2007 Manual page 35

Fig. 9: Installing SST To Radiator Cap Tester
Courtesy of MAZDA MOTORS CORP.
If the gauge needle drops, it may indicate water leakage. Repair or replace the applicable part.
COOLING SYSTEM CAP INSPECTION [MZI-3.5]
WARNING:
1. Clean the cooling system cap and the sealed part.
2. Inspect the cooling system cap for cracks or everted seal.
If there is any malfunction, replace the cooling system cap.
3. Attach the cooling system cap to the SST and a radiator cap tester.
4. Hold the cooling system cap downward and apply pressure gradually. Verify that the pressure is held
stable for 10 s.
If the pressure is not held stable, replace the cooling system cap.
Cooling system cap valve opening pressure
93.2-122.6 kPa {0.95-1.25 kgf/cm
2007 Mazda CX-9 Grand Touring
2007 ENGINE Cooling System (MZI-3.5) - CX-9
Never remove the cooling system cap or loosen the radiator drain
plug while the engine is running, or when the engine and radiator are
hot. Scalding engine coolant and steam may shoot out and cause
serious injury. It may also damage the engine and cooling system.
Turn off the engine and wait until it is cool. Even then, be very
careful when removing the cap. Wrap a thick cloth around it and
slowly turn it counterclockwise to the first stop. Step back while the
pressure escapes.
When you are sure all the pressure is gone, press down on the cap
using the cloth, turn it, and remove it.
2
, 13.5-17.8 psi}