my Toyota Corolla E210 (2019-2024) is overheating, what should I check?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool before starting work.
• Disconnect the battery to prevent electrical issues.

2. Coolant Flush and Replacement

• Drain Old Coolant:
  • Locate the radiator drain valve and place a container underneath.
  • Open the drain valve to let old coolant flow out, then close it once drained.
• Flush the System:
  • Use a radiator flush solution and fill with water. Start the engine with the heater on for about 10-15 minutes.
  • Drain the flush solution and rinse with clean water until clear.
• Refill with New Coolant:
  • Use a 50/50 mixture of antifreeze and distilled water.
  • Fill the radiator and reservoir to the recommended levels.

3. Replace Thermostat (if faulty)

• Remove Thermostat:
  • Disconnect the upper radiator hose.
  • Remove the thermostat housing bolts and take out the thermostat.
• Install New Thermostat:
  • Place the new thermostat in the housing, ensuring proper orientation.
  • Reattach the housing and tighten bolts to manufacturer’s torque specifications.

4. Inspect and Replace Cooling Fans (if necessary)

• Test Fan Operation:
  • Connect the battery to power the fan directly to check functionality.
• Replace Fan Assembly:
  • Disconnect the electrical connector and remove mounting bolts.
  • Install the new fan assembly and connect the electrical harness.