🔧 Escape - Thermostat Replacement

This repair replaces the thermostat assembly on your Escape. The thermostat is a temperature-controlled valve that helps the engine warm up and keeps coolant flowing at the right time.

You will drain some coolant, remove the thermostat housing, install the new thermostat/seal, refill coolant, and bleed air from the system.

Difficulty Level: Intermediate | Estimated Time: 1.5-2.5 hours

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⚠️ Safety & Precautions

• ⚠️ Let the engine cool completely before opening the cooling system. Hot coolant can spray out and burn you.
• ⚠️ Do not remove the coolant reservoir cap while the engine is hot or pressurized.
• ⚠️ Coolant is poisonous. Keep it away from children and animals.
• ⚠️ If you raise your Escape, support it with jack stands. Never work under a vehicle held up only by a jack.
• ⚠️ Battery disconnect is not required for this repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• 8mm socket
• 10mm socket
• 1/4-inch drive ratchet
• 3/8-inch drive ratchet
• 6-inch extension
• Inch-pound torque wrench
• Hose clamp pliers
• Flat-blade screwdriver
• Plastic trim clip remover
• Drain pan 2-gallon minimum
• Funnel
• Flashlight
• Floor jack rated 2-ton minimum
• Jack stands rated 2-ton minimum
• Coolant refractometer or hydrometer
• Nitrile gloves
• Safety glasses
• Shop towels

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Thermostat assembly with seal - Qty: 1
• Thermostat housing O-ring or seal - Qty: 1
• Engine coolant meeting Ford specification WSS-M97B44-D2 - Qty: 1-2 gallons premixed
• Replacement hose clamp - Qty: 1 if damaged

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📋 Before You Begin

• 🅿️ Park your Escape on level ground and set the parking brake.
• 🧊 Wait until the engine is fully cold. The upper radiator hose should feel cool and soft.
• 🧤 Put on safety glasses and nitrile gloves.
• 🪣 Place a drain pan under the front of the engine/radiator area.
• 📌 Hose clamp pliers squeeze spring clamps so you can slide them off without fighting the clamp.
• 📌 A torque wrench tightens bolts to a measured amount so plastic and aluminum parts are not cracked or stripped.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Relieve Coolant Pressure

• Use a shop towel over the coolant reservoir cap.
• Slowly turn the cap counterclockwise by hand.
• If you hear pressure escaping, stop and wait until the sound ends.
• Remove the cap only after pressure is fully gone.

Step 2: Raise the Front If More Access Is Needed

• Use a floor jack rated 2-ton minimum to raise the front of your Escape at the front jacking point.
• Use jack stands rated 2-ton minimum to support the vehicle securely.
• Keep the vehicle level if possible to make refilling easier.
• Never trust the jack alone.

Step 3: Remove the Lower Splash Shield

• Use an 8mm socket and ratchet to remove the lower shield screws.
• Use a plastic trim clip remover to remove any push clips.
• Set the shield and fasteners aside where they will not get lost.

Step 4: Drain Some Coolant

• Place a drain pan 2-gallon minimum under the radiator drain area.
• Use a flat-blade screwdriver to open the radiator drain petcock if accessible.
• If the petcock is not accessible, use hose clamp pliers to loosen the lower radiator hose clamp carefully.
• Drain enough coolant so the level is below the thermostat housing.
• Close the drain petcock by hand, or reinstall the hose and clamp if you drained from the hose.

Step 5: Locate the Thermostat Housing

• Use a flashlight and follow the lower radiator hose to the engine.
• The lower radiator hose connects to the thermostat housing.
• The housing sits low on the engine, so access is usually from the front/lower side.

Step 6: Remove the Hose from the Thermostat Housing

• Use hose clamp pliers to squeeze the spring clamp on the hose.
• Slide the clamp back onto the hose.
• Twist the hose by hand to break it loose.
• If stuck, use a flat-blade screwdriver gently at the hose edge.
• Pull the hose off and let leftover coolant drain into the pan.
• Do not pry hard on plastic.

Step 7: Remove the Thermostat Housing

• Use an 8mm socket or 10mm socket with a 6-inch extension and ratchet to remove the thermostat housing bolts.
• Hold the housing with one hand while removing the last bolt.
• Pull the housing straight off the engine.
• Note how the old thermostat and seal are positioned before removing them.

Step 8: Clean the Sealing Surface

• Use shop towels to wipe the engine sealing surface clean.
• Use a plastic trim clip remover edge to gently remove stuck seal material if needed.
• Do not use a metal scraper. It can scratch the aluminum and cause leaks.
• Keep old gasket pieces out of the coolant opening.

Step 9: Install the New Thermostat and Seal

• Install the new thermostat assembly with seal in the same direction as the old one.
• Make sure the seal is fully seated and not twisted.
• If the new thermostat has a small bleed hole or jiggle valve, place it at the top.
• A jiggle valve is a tiny loose pin that lets trapped air escape.

Step 10: Reinstall the Thermostat Housing

• Place the thermostat housing squarely against the engine by hand.
• Start all bolts by hand first so they do not cross-thread.
• Use an 8mm socket or 10mm socket to lightly snug the bolts in an even pattern.
• Use an inch-pound torque wrench to tighten the bolts to Torque to 10 Nm (89 in-lbs).

Step 11: Reinstall the Radiator Hose

• Push the radiator hose fully onto the thermostat housing neck by hand.
• Use hose clamp pliers to move the spring clamp back to its original position.
• Make sure the clamp sits behind the raised lip on the housing neck.
• A raised lip is the ridge that keeps the hose from sliding off.

Step 12: Refill the Cooling System

• Use a funnel to add coolant meeting Ford specification WSS-M97B44-D2 into the coolant reservoir.
• Fill the reservoir to the MAX line.
• Use a coolant refractometer or hydrometer to check mixture strength if you mixed coolant yourself.
• Premixed coolant is easiest for a beginner because it is already diluted correctly.

Step 13: Bleed Air from the Cooling System

• Leave the coolant reservoir cap off.
• Start the engine.
• Set the heater temperature to full hot and fan to low.
• Let the engine idle while watching the coolant level in the reservoir.
• Use a funnel to add coolant as the level drops.
• Wait until warm air comes from the vents and the upper radiator hose becomes warm.
• This means the thermostat has opened and coolant is circulating.

Step 14: Final Leak Check

• Use a flashlight to inspect the thermostat housing and hose connection while the engine idles.
• If there are no leaks, install the coolant reservoir cap by hand.
• Use an 8mm socket to reinstall the lower splash shield screws.
• Use a plastic trim clip remover or your hand to reinstall the push clips.
• If raised, use the floor jack to lift slightly, remove the jack stands, and lower your Escape.

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✅ After Repair

• ✅ Let the engine cool fully, then recheck the coolant level.
• ✅ Add coolant to the MAX line if needed.
• ✅ Take a short test drive and watch the temperature gauge.
• ✅ Recheck for leaks after the test drive.
• ✅ Check the coolant level again the next morning when the engine is cold.
• ✅ Dispose of old coolant at a recycling center or auto parts store. Never dump it on the ground.

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💰 DIY vs Shop Cost

Shop Cost: $250-$450 (parts + labor)

DIY Cost: $45-$120 (parts only)

You Save: $205-$330 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 1.0-1.5 hours.

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🎯 Ready to get started?

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