Engine Cooling System [L5]: Diagnosis Mazda CX-7 I рестайлинг

ENGINE COOLANT LEVEL INSPECTION [L5]

Note. If the "FL22" mark is shown on or near the cooling system cap, use FL22 type engine coolant. FL22 type engine coolant is shipped as a diluted solution. Use the solution as is when replacing coolant.

Scheme 23

Scheme 24

1. Remove the cooling system cap.
2. Verify that the engine coolant is filled close to the top of the radiator filler neck. If the engine coolant level is low, add engine coolant.
3. Verify that the engine coolant level in the coolant reserve tank is between the FULL and LOW marks. If the engine coolant level is below the LOW mark, add engine coolant.

Scheme 25

Scheme 26

1. Measure the engine coolant temperature and specific gravity using a thermometer and a hydrometer. CAUTION: Use engine coolant at a concentration that meets the environmental conditions in which the vehicle is driven, otherwise engine damage could occur. The engine has aluminum parts and must be protected by an ethylene-glycol-based coolant to prevent corrosion and freezing. Do not use coolants containing Alcohol, Methanol, Borate or Silicate. These coolants could damage the cooling system. Use only soft (demineralized) water in the coolant mixture. Water that contains minerals will cut down on the coolant's effectiveness. Engine coolant damages paint. If engine coolant does get on a painted surface, rinse it off quickly. NOTE: If the "FL22" mark is shown on or near the cooling system cap, use FL22 type engine coolant. FL22 type engine coolant is shipped as a diluted solution. Use the solution as is when replacing coolant.
2. Determine the engine coolant protection level by referring to the graph shown in the figure. If the engine coolant protection level is not correct, add water or engine coolant.

ENGINE COOLANT LEAKAGE INSPECTION [L5]

Scheme 27

1. Inspect the engine coolant level. (See «ENGINE COOLANT LEVEL INSPECTION [L5]»(ref-375353-S08244040492010102800000) .)
2. Remove the cooling system cap.
3. Install the SST and a radiator cap tester to the radiator filler neck.
4. Apply pressure using the radiator cap tester. CAUTION: Applying more than 122.6 kPa {1.25 kgf/cm 2 , 17.8 psi} can damage the hoses, fittings, and other components, and cause leakage. 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. If the gauge needle drops, it may indicate water leakage. Repair or replace the applicable part.

COOLING SYSTEM CAP INSPECTION [L5]

Scheme 28

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 2 , 13.5-17.8 psi}

Scheme 29

1. Remove in the order indicated in the table.
2. Install in the reverse order of removal.

Scheme 30

1. Remove the coolant reserve tank from the radiator cowling tabs shown in the figure by lifting them with a flathead screwdriver.

THERMOSTAT INSPECTION [L5]

1. Remove the thermostat. (See «THERMOSTAT REMOVAL/INSTALLATION [L5]»(ref-375353-S42571692962010102800000) .)
2. Visually check that the thermostat valve is closed.
3. Place the thermostat in water. WARNING: During inspection, the thermostat and water are extremely hot and can cause severe burns. Do not touch the thermostat and water.
4. Heat the water and check the following. Opening temperature and valve lift If there is a malfunction, replace the thermostat. (See «THERMOSTAT REMOVAL/INSTALLATION [L5]»(ref-375353-S42571692962010102800000) .) Thermostat initial-opening temperature 80-84°C {176-183°F} Thermostat full-open temperature 97°C {207°F} Thermostat full-open lift More than 8.0 mm {0.31 in}