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2017 Ford Escape 1.5L EcoBoost - Constant Coolant Loss & Overheating

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Mike T. · rep 0 · May 25, 1:32 AM · 1 replies · solved · Question

Vehicle: 2017 Ford Escape Titanium

Hello fellow Ford owners, I'm having a persistent and frustrating problem with my 2017 Ford Escape Titanium, which has the 1.5L EcoBoost engine. I keep losing coolant, and the engine occasionally overheats, especially on longer drives or in heavy traffic. I've had to top off the coolant reservoir multiple times a month.

There are no visible leaks on the ground, and I don't see any obvious hose issues. I've checked the oil, and it doesn't look milky. The exhaust doesn't seem to be blowing white smoke constantly either. Is this a known issue with the 1.5L EcoBoost, and what should I be looking for?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 25, 1:32 AM

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ClearTheCode admin answer:

Your description of constant coolant loss and occasional overheating without external leaks is a well-documented and serious issue with the 1.5L and 1.6L EcoBoost engines found in various Ford models, including the 2017 Ford Escape. This often points to internal coolant intrusion.

Common Causes:

  1. Cylinder Head/Block Cracking: A design flaw in some early 1.5L/1.6L EcoBoost engines can lead to microscopic cracks in the cylinder head or engine block, allowing coolant to seep into the combustion chambers or oil passages. This is a significant concern.
  2. Head Gasket Failure: While less common than cylinder head cracks for this specific engine, a faulty head gasket can also cause internal coolant leaks.
  3. Water Pump Failure: Although it typically results in external leaks, a failing water pump can sometimes have internal issues that lead to coolant loss or inadequate circulation, contributing to overheating.

What to Do:

  1. Monitor Closely: Pay attention to any rough running, misfires (especially on cold start), or a sweet smell from the exhaust, which can indicate burning coolant.
  2. Pressure Test: A cooling system pressure test performed by a technician can help identify internal leaks, even if they aren't visible externally.
  3. Block Test: A 'block test' or 'combustion leak test' can detect exhaust gases in the coolant, confirming a breach between the combustion chamber and the cooling system.
  4. Check for TSBs/Recalls: Ford has acknowledged this issue and has issued extended warranties and Technical Service Bulletins (TSBs) for certain vehicles affected by coolant intrusion. Check with a Ford dealer about your vehicle's eligibility.

When to See a Shop:

This is a critical issue that requires immediate attention from a qualified Ford technician. Continuing to drive with coolant intrusion can lead to catastrophic engine failure due to overheating, hydro-locking, or damage from diluted oil. If your Check Engine Light comes on, you might see codes like P030x (misfire in a specific cylinder) or P0420 (catalyst system efficiency below threshold) if the coolant is damaging the catalytic converter. Do not delay seeking professional diagnosis and repair, as this is often a major engine repair or replacement.

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