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Coolant Intrusion/Low Coolant Warning on 2019 Ford Edge ST (2.7L EcoBoost)

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Mike T. · rep 0 · May 25, 1:37 AM · 1 replies · solved · Question

Vehicle: 2019 Ford Edge ST

Hey Ford community,

I'm getting really worried about my 2019 Ford Edge ST with the 2.7L EcoBoost engine. For the past few weeks, I've been getting intermittent 'low coolant' warnings on the dash. I've topped it off a couple of times, but the level seems to drop again after a while. I haven't seen any obvious puddles under the car, so I'm not sure where it's going.

I've read some concerning things online about coolant intrusion issues with certain Ford EcoBoost engines, and it's making me nervous. My Edge has about 70,000 miles on it now, and it's been running fine otherwise, no misfires or smoke from the exhaust that I've noticed.

Could this be the dreaded coolant intrusion problem? What are the symptoms I should be looking for, and what's the typical fix? I want to be prepared when I take it to the dealership.

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 1:37 AM

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ClearTheCode admin answer:

Your concern about coolant intrusion in your 2019 Ford Edge ST with the 2.7L EcoBoost engine is valid. This is a known issue affecting several Ford EcoBoost engines, including the 2.7L, where coolant can leak internally into the cylinders.

  1. Common Causes:

    • Cylinder Head Gasket Failure: The most common cause is a design flaw or material issue with the cylinder head gasket, allowing coolant to seep into the combustion chambers.
    • Cracked Cylinder Head/Block: In more severe or prolonged cases, the cylinder head or even the engine block can develop cracks, leading to coolant loss.
    • Coolant System Leaks (External): While you haven't seen puddles, it's always possible for slow external leaks to occur from hoses, the radiator, water pump, or reservoir. These can sometimes evaporate before hitting the ground.

  2. When to See a Shop:

    • Immediately: Any persistent coolant loss, especially without an external leak, warrants immediate professional diagnosis. Continuing to drive with coolant intrusion can lead to catastrophic engine failure.
    • Warning Signs: If you notice white smoke from the exhaust (especially on startup), rough idle, misfires (which might trigger a Check Engine Light with codes like P0301-P0306 for specific cylinder misfires), or a sweet smell from the exhaust, get it to a shop immediately.

  3. Recommended Steps:

    • Professional Diagnosis: Take your Edge ST to a Ford dealership or a reputable independent shop specializing in Ford EcoBoost engines. They will perform a comprehensive diagnostic, which typically includes:
      • Coolant System Pressure Test: To check for external leaks.
      • Block Test (Combustion Leak Test): This test checks for combustion gases in the coolant, indicating an internal leak.
      • Borescope Inspection: A camera can be inserted into the cylinders via the spark plug holes to look for signs of coolant (like steam-cleaned piston tops).
      • OBD-II Scan: While coolant intrusion itself doesn't have a specific code, persistent misfires will trigger P030X codes, and prolonged issues can lead to catalyst efficiency codes (P0420/P0430).
    • Review TSBs/Recalls: Ford has issued TSBs related to coolant intrusion for various EcoBoost engines, sometimes involving updated head gaskets or even engine replacement. The dealership can check for any applicable TSBs for your VIN.
    • Repair: If coolant intrusion is confirmed, the repair typically involves cylinder head gasket replacement. In severe cases, it might necessitate a new or remanufactured engine. This can be a very costly repair, so understanding your warranty coverage (powertrain warranty typically lasts 5 years/60,000 miles, but extended warranties may apply) is crucial.
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