why does my Ford Mustang S650 (2024-Present) engine overheat during idle

Solution

1. Preparation

• Gather tools and prepare the workspace.
• Tools Required: OBD-II scanner, coolant pressure tester, thermometer, basic hand tools (wrenches, screwdrivers), and safety equipment (gloves and goggles).

2. Check and Replace Coolant

• Sub-steps:
  1. Ensure the engine is cool, then open the radiator cap slowly to relieve any pressure.
  2. Inspect coolant levels in the reservoir; if low, add manufacturer-recommended coolant.
  3. Perform a coolant flush if coolant is discolored or has debris present.
  4. Refill the system with a 50/50 mix of coolant and distilled water.

3. Inspect and Repair Radiator and Hoses

• Sub-steps:
  1. Visually inspect the radiator for signs of leaks, damage, or corrosion.
  2. Check all coolant hoses for cracks, swelling, or leaks and replace any faulty hoses.
  3. Clean or replace the radiator if blocked or damaged.

4. Test and Replace Thermostat

• Sub-steps:
  1. Remove the thermostat housing by loosening the bolts with a wrench.
  2. Take out the thermostat and submerge it in hot water (approximately 180°F) to observe if it opens.
  3. If it does not open, replace it with a new thermostat that matches OEM specifications.
  4. Reassemble the housing with a new gasket and torque bolts to manufacturer specifications.

5. Verify Radiator Fan Operation

• Sub-steps:
  1. Start the engine and allow it to reach operating temperature.
  2. Check that the radiator fan activates when the engine temperature gauge approaches the overheating threshold.
  3. If the fan does not operate, test the fan relay and wiring; replace as necessary.