Cooling System: Diagnosis Mazda MX-5 NB рестайлинг

ENGINE COOLANT LEVEL INSPECTION

1. Remove the radiator cap. (See «COOLING SYSTEM SERVICE WARNINGS»(ref-194426-S26489632152005092800000) .)
2. Verify that the coolant level is near the radiator filler neck.
3. Verify that the coolant level on the coolant reservoir is between the FULL and LOW marks. If the engine coolant level is below LOW, remove the radiator cap and add coolant. (See «COOLING SYSTEM SERVICE WARNINGS»(ref-194426-S26489632152005092800000) .)

Scheme 9

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Scheme 11

1. Drain the coolant in the coolant reservoir.
2. Remove the radiator cap and the radiator drain plug. (See «COOLING SYSTEM SERVICE WARNINGS»(ref-194426-S26489632152005092800000) .)
3. Drain the coolant into a container.
4. Flush the cooling system with water until all traces of color are gone.
5. Let the system drain completely.
6. Tighten the radiator drain plug. Tightening torque 0.7-1.1 N.m (7-10 in.lbf) CAUTION: The engine has aluminum parts than can be damaged by alcohol or methanol antifreeze. Do not use alcohol or methanol in the cooling system. Use only ethylene-glycol-based coolant. Use only soft (demineralized) water in the coolant mixture. Water that contains minerals will cut down the coolant effectiveness. Engine coolant will damage paint. If engine coolant does get on a painted surface, rinse it off quickly.
7. Referring to the following graph and chart, select proper gravity of the coolant. Antifreeze solution mixture percentage
8. Slowly pour the coolant into the radiator up to the coolant filler port. Filling pace 1.0 L (1.1 US qt)/min [max]
9. Fill the coolant into the reservoir up to the FULL mark on the coolant reservoir.
10. Fully install the radiator cap.
11. Start the engine and warm it up. CAUTION: If the coolant temperature becomes too high, stop the engine to prevent it from overheating.
12. After engine warms up, perform the following steps. Run the engine at 2,500 RPM for 5 Min. Run the engine at 3,000 RPM for 5 Min. Repeat steps (1) and (2) several times.
13. Stop the engine and wait until it is cool.
14. Inspect the coolant level. If it is low, repeat Steps 7-12.
15. Verify there is no coolant leakage.

Scheme 12

1. Inspect the coolant level. (See «ENGINE COOLANT LEVEL INSPECTION»(ref-194426-S23094016582005092800000) .)
2. Remove the radiator cap.
3. Connect a radiator cap tester and the SST to the radiator filler neck. CAUTION: Applying more than 123 kPa (1.25 kgf/cm 2, 17.8 psi) can damage the hoses, fittings, and other components, and cause leakage.
4. Apply pressure to the radiator. Pressure 123 kPa (1.25 kgf/cm 2, 17.8 psi)
5. Verify that the pressure is held. If not, inspect the system for coolant leakage.

RADIATOR CAP INSPECTION

Scheme 13

1. Attach the radiator cap to a radiator cap tester with the SST. Apply pressure gradually.
2. Verify that the pressure becomes stable within the specification. If the pressure is held for 10 seconds the radiator cap is normal. Pressure 94-122 kPa (0.95-1.25 kgf/cm 2, 13.5-17.7 psi)

Scheme 14

1. Disconnect the negative battery cable.
2. Drain the engine coolant. (See «ENGINE COOLANT REPLACEMENT»(ref-194426-S22983086202005092800000) .)
3. Remove the air hose.
4. Remove in the order indicated in the table.
5. Install in the reverse order of removal.

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Scheme 16

1. Disconnect the negative battery cable.
2. Remove the air hose.
3. Drain the engine coolant. (See «ENGINE COOLANT REPLACEMENT»(ref-194426-S22983086202005092800000) .)
4. Remove in the order indicated in the table.
5. Install in the reverse order of removal.

Scheme 17

1. Install the thermostat into the cylinder head with the jiggle pin at the top.

Scheme 18

1. Install a new gasket with the seal print side facing the cylinder head.

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1. Visually check that the thermostat valve is closed.
2. Place the thermostat and a thermometer in water. WARNING: During inspection, the thermostat and water are extremely hot and they can cause burns. Do not touch the thermostat and water directly.
3. Heat the water and check the following. If not as specified, replace the thermostat.

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Scheme 22

1. Remove the air cleaner.
2. Remove the timing belt. (See «TIMING BELT REMOVAL/INSTALLATION»(ref-194424-S32998433022005092800000) .)
3. Remove in the order indicated in the table.
4. Install in the reverse order of removal.