Fig. 9: Applying Pressure With Radiator Cap Tester
Courtesy of MAZDA MOTORS CORP.
Engine coolant leakage inspection pressure 122.6 kPa {1.25 kgf/cm
2
, 17.8 psi} [1 min]
5. When pressurizing the cooling system, verify that the pressure is maintained.
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If the gauge needle drops, it may indicate water leakage. Repair or replace the applicable part.
COOLING SYSTEM CAP INSPECTION [MZI-3.7]
1. Clean the cooling system cap and the sealed part.
2. Inspect the cooling system cap for cracks or everted seal.
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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.
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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
2
, 13.5-17.8 psi}
WARNING:
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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.
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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.
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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 10
© 2005 Mitchell Repair Information Company, LLC.
