my Toyota RAV4 XA40 (2013-2018) is overheating what's causing it

Solution

1. Preparation

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

2. Check and Refill Coolant

• Sub-steps:
  • Open the radiator cap (ensure engine is cool).
  • Inspect coolant level in the reservoir; refill with the recommended coolant type if low.
  • Check for contamination in the coolant (rust or oil).

3. Inspect and Replace Thermostat

• Sub-steps:
  • Locate the thermostat housing (typically near the engine block).
  • Remove the housing bolts using a socket set.
  • Take out the old thermostat and inspect for proper opening and closing.
  • Install a new thermostat, ensuring it is oriented correctly (with the jiggle valve at the top).
  • Reattach the housing and torque bolts to manufacturer specifications.

4. Repair or Replace Leaking Components

• Sub-steps:
  • Replace any damaged hoses or fittings identified during inspection.
  • If the radiator has a leak, drain the coolant, remove the radiator, and replace it with a new one.
  • Ensure all connections are tight and secure.

5. Test the Radiator Fan

• Sub-steps:
  • Reconnect the battery.
  • Start the engine and let it reach normal operating temperature.
  • Observe if the radiator fan engages. If not, test the fan relay and wiring; replace the fan if defective.