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Home >> Mazda >> 2003 >> B2300 Base, Automatic >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Engine Controls [Removal & Installation] >> Cooling System >> Cooling System Bleeding >> B4000
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Cooling System Bleeding: B4000

CAUTION: 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. When adding engine coolant, use a 50/50 mixture of engine coolant and clean drinkable water.
CAUTION: Add Mazda Premium Gold Engine Coolant VC-7-A (in Oregon VC-7-B) or equivalent (Yellow color). Use the same coolant that was drained from the system. DO NOT mix coolant types.
CAUTION: DO NOT add Mazda Specialty Orange Engine Coolant VC-2. Mixing coolants can degrade the coolant's corrosion protection.
CAUTION: DO NOT add alcohol, methanol, brine or any engine coolants mixed with alcohol or methanol antifreeze. These can cause engine damage from overheating or freezing.
CAUTION: DO NOT mix recycled coolant unless it meets the requirements of Mazda specification VC-7-A (in Oregon VC-7-B). Not all coolant recycling processes meet these specifications. Use of such coolant can harm the engine and cooling system components.
  1. Refill the coolant recovery reservoir with the correct 50/50 mixture of water and appropriate coolant.
  2. Install the radiator cap.
  3. Move the temperature blend knob to the full warm position.
  4. Run the engine until it reaches operating temperature.
  5. Add the proper coolant mixture to the coolant recovery reservoir until the coolant level is between the COOLANT FILL LEVEL marks.
  6. Recheck the coolant level and fill as needed.
  7. Turn off the engine and allow the cooling system to cool. Recheck the coolant level and fill the cooling system to the FULL mark on the coolant recovery reservoir.
  8. Repeat steps 1-7 until the reservoir level is okay.
  9. Select the maximum heater temperature and blower motor speed settings. Position the control to discharge air from the A/C vents to the instrument panel.
    10. WARNING: DO NOT stand in line with or near the engine cooling fan blade when revving the engine.
    CAUTION: If the air discharge remains cool and the engine coolant temperature gauge does not move, the engine coolant level is low in the engine and must be filled. Stop the engine, allow it to cool and fill the cooling system.
  10. Start the engine and allow it to idle until the normal operating temperature is reached. Hot air should discharge from the A/C vents. The engine coolant temperature gauge should maintain a stabilized reading in the middle of the NORMAL range and the upper radiator hose should feel hot to the touch.
  11. Shut the engine off and allow it to cool.
  12. Check the engine for coolant leaks.
  13. Check the engine coolant level in the coolant recovery reservoir and fill it as necessary.
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