Signs of Coolant Leaks in the Ford Explorer Sixth Generation (2020-Present)

Coolant leaks in the Ford Explorer Sixth Generation can lead to overheating and engine damage if not addressed promptly. Below are the common symptoms, diagnostic steps, and general observations to help identify coolant leaks.

Step 1: Visual Inspection

• Tools Required: Flashlight, gloves
• Procedure:
  • Park the vehicle on a level surface and allow it to cool down.
  • Open the hood and visually inspect the radiator, hoses, water pump, and engine block for signs of coolant leakage.
  • Check the overflow reservoir for cracks or leaks.

Step 2: Check Coolant Levels

• Tools Required: Coolant tester (optional)
• Procedure:
  • With the engine cool, check the coolant level in the overflow reservoir.
  • If the level is low, top it off with the appropriate coolant mixture and observe if it drops again after a short drive.

Step 3: Pressure Test the Cooling System

• Tools Required: Cooling system pressure tester
• Procedure:
  • Remove the radiator cap (only when the engine is cool).
  • Attach the pressure tester and pump it up to the recommended pressure (usually around 15 psi).
  • Observe for drop in pressure or coolant seeping from any joints, hoses, or the radiator itself.

Step 4: Inspect the Heater Core

• Tools Required: None
• Procedure:
  • Check for any wetness or stains on the passenger side floor mats, which could indicate a leaking heater core.
  • Look for coolant odor inside the cabin.

Step 5: Check for Engine Oil Contamination

• Tools Required: Oil dipstick
• Procedure:
  • Remove the oil dipstick and inspect the oil for signs of coolant contamination (a milky or frothy appearance).
  • This could indicate a blown head gasket leading to coolant mixing with the engine oil.

Repair Instructions

Step 1: Replace Leaking Hoses

• Tools Required: Socket set, hose clamps, replacement hoses
• Procedure:
  • Identify which hose is leaking and remove the clamps using a socket or screwdriver.
  • Slide the old hose off and replace it with a new one, ensuring it fits snugly.
  • Reinstall the clamps.

Step 2: Repair or Replace Radiator

• Tools Required: Socket set, drain pan, replacement radiator (if needed)
• Procedure:
  • Drain the coolant from the radiator using a drain pan.
  • Remove any mounting bolts and hoses connected to the radiator.
  • Replace the old radiator with a new one and reconnect hoses and fittings.
  • Refill coolant and bleed the system to remove any air pockets.

Step 3: Address Heater Core Leaks

• Tools Required: Socket set, replacement heater core (if needed)
• Procedure:
  • If the heater core is leaking, you may need to remove the dashboard for access.
  • Disconnect the hoses and electrical connections.
  • Remove the old heater core and install the new one, reconnecting all components.

Step 4: Head Gasket Replacement (if applicable)

• Tools Required: Socket set, torque wrench, head gasket kit
• Procedure:
  • If a blown head gasket is confirmed, the engine will need to be disassembled.
  • Remove the intake and exhaust manifolds, cylinder head, and old gasket.
  • Clean the surfaces and install the new head gasket, reassembling the engine and torquing to specifications.

Conclusion

If you experience any of the above symptoms, it is crucial to address coolant leaks promptly to avoid potential engine damage. If you lack the tools or experience for repairs, consider consulting a professional automotive technician for assistance.