my Toyota RAV4 XA50 (2019-2024) is losing coolant without any visible leaks what to do

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the engine is cool and disconnect the battery.
• Prepare a clean workspace and ensure safety equipment is available.

2. Pressure Test

• Tools Required: Cooling system pressure tester.
• Attach the pressure tester to the radiator neck.
• Pump the tester to the recommended pressure (usually around 15-20 psi) and monitor for pressure drop.
• If pressure drops, inspect visually for leaks in hoses, gaskets, and around the engine block.

3. Inspect and Replace Components

• Tools Required: Socket set, torque wrench, gasket scraper.
• If a leak is detected in hoses or gaskets, replace the affected components:
  • Remove the old hose or gasket.
  • Clean the mating surfaces with a gasket scraper.
  • Install the new gasket or hose, ensuring proper alignment.
  • Torque to manufacturer specifications (refer to service manual for specific values).

4. Flush and Refill Cooling System

• Tools Required: Coolant funnel, cooling system flush kit.
• Drain the old coolant from the system into a suitable container.
• Follow the manufacturer's instructions for the flush kit to clean the system.
• Refill the cooling system with the recommended type of coolant (typically a 50/50 mixture of antifreeze and water).

5. Final Check

• Reconnect the battery and start the engine.
• Run the engine until it reaches operating temperature while monitoring for leaks.
• Check coolant levels again and top off as necessary.