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HOMESERVICE MANUALSMAZDA2009B4000 V6-4.0LREPAIR AND DIAGNOSISMAINTENANCEFLUIDSCOOLANTSERVICE AND REPAIRPROCEDURES
2009 Mazda B4000 V6-4.0L

Procedures

2009 Mazda B4000 V6-4.0LSECTION Procedures


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ENGINE COOLANT FLUSHING - 4.0L

Engine and Radiator

WARNING:Do not open the cooling system while it is hot or while the engine is running. Failure to follow these instructions may result in personal injury.
1. Drain the cooling system. See - Removal and Replacement.

2. Remove the thermostat. See - Service and Repair.

3. Install the thermostat housing without the thermostat.

4. Flush the engine and radiator.

5. Install the thermostat. See - Service and Repair.

6. Back flush the heater core if necessary.

7. Fill the cooling system. See - Removal and Replacement.

Heater Core

1. Partially drain the cooling system. See - Removal and Replacement.






WARNING:Do not open the cooling system while it is hot or while the engine is running. Failure to follow these instructions may result in personal injury.

2. Back flush the heater core.

3. Fill the cooling system. See - Removal and Replacement.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.