Cooling System [3.0L (4V)]: Other Mazda Tribute I рестайлинг

ENGINE COOLING

The cooling system components are the

1. radiator
2. bypass tube
3. pressure relief cap
4. degas bottle
5. radiator draincock
6. coolant pump
7. coolant temperature indicator sender unit
8. thermostat housing Engine coolant provides freeze protection, boil protection, cooling efficiency and corrosion protection to the engine and cooling components. In order to obtain these protections, the engine coolant must be maintained at the correct concentration and fluid level in the degas bottle. When adding engine coolant, use a 50/50 mixture of clean, drinkable water and engine coolant. CAUTION: The cooling system is filled with either green-colored or yellow-colored Mazda Premium Engine Coolant meeting Mazda Specifications. To determine the vehicle's coolant type (color), check the coolant reservoir. To maintain the integrity of the coolant and the cooling system and maintain the warranty on the cooling system
9. Add Mazda Premium Engine Coolant of the type of coolant originally equipped in the vehicle. If you are unsure which type of coolant the vehicle requires, check the coolant reservoir.
10. Do not add/mix an orange-colored, extended life coolant such as Mazda Specialty Orange Engine Coolant, meeting Mazda specifications with factory-filled coolant. Mixing Mazda Specialty Orange Engine Coolant or any orange-colored extended life product with the factory filled coolant can result in degraded corrosion protection.
11. A large amount of water without engine coolant may be added, in case of an emergency. In this instance, the cooling system must be drained and refilled with a 50/50 mixture of engine coolant and distilled water as soon as possible. Water alone (without engine coolant) can cause engine damage from corrosion, overheating or freezing.
12. Do not use alcohol, methanol or brine or any engine coolants mixed with alcohol or methanol antifreeze (coolant). Alcohol and other liquids can cause engine damage from overheating of freezing.
13. Do not add extra inhibitors of additives to the coolant. these can be harmful and compromise the corrosion protection of the engine coolant.
14. Do not mix with recycled coolant unless from a Mazda-approved recycling process. (See Use of Recycled Engine Coolant section of the owners manual.

Cap

1. Remove the pressure relief cap from the degas bottle.
2. Immerse the pressure relief cap in water and install it on the shallow filler neck of Radiator/Heater Core Pressure Tester and Radiator Cap Adapter, part of Radiator/Heater Core Pressure Tester.
3. Immerse the filler neck seal in water and install it in the filler neck adapter.
4. Install the filler neck adapter with the filler neck seal to the Radiator Cap Adapter.
5. Connect the female quick-connect fitting of the pressure test pump to the male quick-connect fitting of the filler neck adapter. NOTE: If the plunger of the pump is depressed too fast, an erroneous pressure reading will result.
6. Slowly depress the plunger of the pressure test pump until the pressure gauge reading stops increasing and note the highest pressure reading obtained.
7. Release the pressure by turning the relief screw counterclockwise. Then tighten the pressure relief screw and repeat Step 6 (at least twice) to make sure the reading is repeatable within the specifications of the pressure relief cap.
8. If the pressure test gauge readings are not within specifications, install a new pressure relief cap. If the pressure test gauge readings are within specifications, carry out the cooling system Pressure Test.

Thermostat - Water

A new water thermostat should be installed only after the following electrical and mechanical tests have been carried out.

Thermostat - Electrical Test

Note. The Electrical Thermostat Test is most accurate if carried out indoors at less than 37.8° C (100° F) ambient air. This test may be carried out with or without the hood open and with the engine warm or cold.

1. Check the engine coolant level. Fill as needed.
2. A WDS or equivalent tester may be used to monitor the ECT on vehicles equipped with data link connector (DLC). NOTE: Running this test with the vehicle in gear or with the A/C compressor clutch engaged (running) will cause incorrect diagnosis.
3. Place the transaxle in PARK (P) or NEUTRAL (N).
4. Start the engine and allow the engine to idle throughout this test. Allow the engine to run for two minutes, then record the ECT voltage. Record the ECT voltage every 60 seconds. When the ECT voltage trend changes direction or only changes slightly (0.03 volt or less) from the previous reading, record this as the thermostat opening voltage. Use the voltage and corresponding coolant temperature chart listed below. COOLANT TEMPERATURE AND ECT (VOLTS) SPECIFICATION Coolant Temperature °C (°F) ECT (Volts) 22 (71) 3.00 43 (109) 2.01 71 (159) 1.01 82 (180) 0.75 91 (195) 0.059 97 (206) 0.050 105 (221) 0.040
5. If the thermostat opening voltage is greater than 0.75 volt and less than 82° C (180° F), install a new water thermostat.
6. If the thermostat opening voltage is less than 0.75 volt and greater than 82° C (180° F), the water thermostat is good and should not be replaced. See the Troubleshooting Index for further instructions.

Thermostat - Mechanical Test

1. Remove the water thermostat.
2. Immerse the water thermostat in a boiling antifreeze and water mixture.
3. See the «GENERAL SPECIFICATIONS»(ref-221843-S21059767742006022600000) for water thermostat opening temperatures.

Cooling Fan Motor and Shroud

1. Inspect the fan blade and shroud for any foreign materials. Clear the obstruction and continue the test procedure.
2. Rotate the fan to see if any contact between the shroud and blade exists. If contact is observed, install a new fan shroud assembly.
3. Rotate the fan by hand. The fan should rotate freely (no resistance should be felt, the fan will free-wheel with minimum effort). If any resistance is present, install a new fan assembly.