why is my Toyota RAV4 overheating in stop-and-go traffic

Solution

1. Preparation

• Gather tools and parts required for repair.
• Allow the engine to cool completely before starting work.
• Disconnect the battery to ensure safety while handling electrical components.

2. Coolant System Inspection

• Tools Required: Coolant pressure tester, socket set
• Remove the radiator cap and inspect for any signs of corrosion or damage.
• Use a coolant pressure tester to check for leaks in the cooling system.
• If leaks are found, proceed to replace the affected components (hoses, radiator, or water pump).

3. Thermostat Replacement

• Tools Required: Socket set, torque wrench, gasket scraper
• Remove the thermostat housing by unscrewing the bolts.
• Take out the old thermostat and clean the mating surfaces.
• Install the new thermostat (ensure correct orientation) and replace the gasket.
• Torque the bolts to the manufacturer's specifications.

4. Cooling Fan Inspection and Replacement

• Tools Required: Multimeter, socket set
• Disconnect the cooling fan connector and check the voltage with a multimeter while the engine is running.
• If there’s no voltage, check the fan relay and fuses; replace any faulty components.
• If the fan is not operational, remove it from the assembly and replace it with a new fan.

5. Final Assembly

• Refill the cooling system with the appropriate coolant mixture.
• Bleed the cooling system to remove any air pockets.
• Reconnect the battery and start the engine, allowing it to reach operating temperature.