🔧 Expedition - Water Pump Replacement

The water pump circulates coolant through your engine and radiator. If it’s leaking or the bearing is failing, you can get overheating, coolant loss, and engine damage—so replacement is important.

Difficulty Level: Intermediate | Estimated Time: 3-6 hours

Assumption: This is the 3.5L EcoBoost external, belt-driven water pump (most common).

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⚠️ Safety & Precautions

• ⚠️ Never open the coolant cap hot; wait until fully cool.
• ⚠️ The electric cooling fan can turn on by itself—disconnect the battery negative cable before working near the fan.
• ⚠️ Use jack stands on the frame; never rely on a jack alone.
• ⚠️ Catch coolant in a drain pan; keep it away from kids/pets and dispose properly.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Drain pan (at least 3-gallon)
• Funnel
• 8mm socket
• 10mm socket
• 13mm socket
• 15mm socket
• Ratchet (3/8" drive)
• Breaker bar (3/8" or 1/2" drive)
• Torque wrench (10–80 ft-lbs range)
• Hose clamp pliers
• Trim clip removal tool
• Flat-blade screwdriver
• Plastic gasket scraper
• Shop towels
• Serpentine belt removal tool (specialty)
• Vacuum coolant refill kit (specialty)

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Water pump - Qty: 1
• Water pump gasket / O-ring (as equipped) - Qty: 1
• Engine coolant (Motorcraft Yellow equivalent, concentrate) - Qty: 2 gallons
• Distilled water - Qty: 2 gallons
• Serpentine belt - Qty: 1
• Hose clamps (as needed) - Qty: 2-4

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📋 Before You Begin

• Park on level ground, set the parking brake, and chock the rear wheels.
• Let the engine cool completely (radiator hoses should feel cool).
• Disconnect the negative battery cable using a 10mm socket to prevent the electric fan from turning on.
• Raise the front and support with jack stands under the frame.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Drain the coolant

• Place a drain pan under the radiator drain area.
• Slowly loosen the coolant degas bottle cap by hand to relieve any leftover pressure.
• Remove the lower splash shield using an 8mm socket and trim clip removal tool.
• Open the radiator drain (petcock) and let coolant drain fully. Use a flat-blade screwdriver only if needed.

Step 2: Remove the intake ducting for access

• Loosen the intake clamps using a flat-blade screwdriver (or 8mm socket if clamp uses a bolt).
• Unclip/remove the intake tube and set it aside.

Step 3: Remove the serpentine belt

• Locate the belt routing diagram (usually on the radiator support). Take a quick photo.
• Rotate the belt tensioner using a 15mm socket with a breaker bar (or serpentine belt removal tool (specialty)).
• Slide the belt off one pulley, then release the tensioner slowly.
• Remove the belt from the engine bay.

Step 4: Disconnect hoses at the water pump

• Use hose clamp pliers to compress the clamp(s) and slide them back on the hose.
• Twist the hose gently to break it free, then pull it off the water pump.
• Tip: Use a rag to catch leftover coolant.

Step 5: Remove the water pump

• Remove the water pump mounting bolts using a 10mm socket.
• Support the water pump as the last bolts come out, then remove it.
• Clean the sealing surface using a plastic gasket scraper and shop towels.
• Do not gouge the aluminum surface. Keep debris out of the opening.

Step 6: Install the new water pump

• Install the new gasket/O-ring onto the new water pump (make sure it sits flat and is not pinched).
• Position the water pump and start all bolts by hand.
• Tighten bolts evenly in a crisscross pattern using a 10mm socket.
• Torque to 18 Nm (13 ft-lbs) using a torque wrench.

Step 7: Reconnect hoses

• Push hoses fully onto the water pump fittings.
• Reposition clamps using hose clamp pliers (clamps should sit behind the raised bead on the fitting).

Step 8: Reinstall the serpentine belt

• Route the belt using your photo/diagram.
• Rotate the tensioner with a 15mm socket and breaker bar, slip the belt onto the last pulley, then release tension slowly.
• Double-check the belt is centered in every pulley groove.

Step 9: Reassemble and refill coolant

• Reinstall the intake ducting and tighten clamps using a flat-blade screwdriver (or 8mm socket as equipped).
• Reinstall the splash shield using an 8mm socket and trim clip removal tool.
• Best method: Use a vacuum coolant refill kit (specialty) to refill without air pockets.
• Standard method: Fill the degas bottle with a 50/50 mix of Motorcraft Yellow equivalent coolant and distilled water using a funnel.

Step 10: Bleed air and check operation

• Reconnect the negative battery cable using a 10mm socket.
• Start the engine and set heat to MAX (this opens the heater circuit).
• Let it idle and watch for leaks around the pump and hoses.
• As the engine warms up, top off the degas bottle as the level drops.
• Shut the engine off, let it cool fully, then recheck and top off to the “MAX” line.

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✅ After Repair

• Test drive 10–15 minutes while watching the temperature gauge.
• Park, inspect for leaks, and recheck coolant level after a full cool-down.
• If you hear squealing, recheck belt routing and that it’s fully seated in the grooves.
• If it overheats, stop driving—there may still be air trapped that needs bleeding.

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💰 DIY vs Shop Cost

Shop Cost: $800-$1,400 (parts + labor)

DIY Cost: $150-$350 (parts only)

You Save: $650-$1,050 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 3-6 hours.

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🎯 Ready to get started?

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