🔧 Focus - Water Pump Replacement

The water pump circulates coolant through the engine and radiator. When it leaks or the bearing fails, you can get overheating, coolant loss, or a grinding noise. On your Focus, the pump is driven by the accessory (serpentine) belt, so you’ll remove the belt and right-side components for access.

Difficulty Level: Advanced | Estimated Time: 3-5 hours

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⚠️ Safety & Precautions

• 🧯 Never open the coolant cap on a hot engine; let it cool fully first.
• 🧤 Coolant is toxic—wear gloves and clean spills immediately.
• 🧱 Support the car with jack stands; never rely on a floor jack alone.
• 🪵 If you support the engine from below, use a wood block to avoid oil pan damage.
• 🔌 Battery disconnect is recommended before working near the starter/engine harness: remove negative terminal first.

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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 2-gallon)
• Funnel
• Spill-free funnel kit (specialty)
• Torque wrench (10–150 ft-lbs range)
• 1/4" drive ratchet
• 3/8" drive ratchet
• Extensions set (3", 6")
• Serpentine belt tool (specialty)
• Socket set: 7mm, 8mm, 10mm, 13mm, 15mm, 18mm
• Wrench set: 10mm, 13mm, 15mm
• Flat trim clip tool
• Flathead screwdriver
• Plastic scraper
• Shop towels

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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
• Serpentine belt - Qty: 1
• Engine coolant (Ford-approved orange coolant) - Qty: 2 gallons
• Distilled water (if using concentrate coolant) - Qty: 1-2 gallons
• Cooling system flush water (optional) - Qty: 1

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📋 Before You Begin

• Park on level ground, set the parking brake, and place wheel chocks behind the rear wheels.
• Let the engine cool completely (upper radiator hose should feel cool).
• Disconnect the battery using a 10mm socket: remove negative terminal first.
• Raise the front-right corner with a floor jack and support with jack stands.
• Tip: Take a photo of the belt routing.

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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 area.
• Slowly loosen the coolant reservoir cap by hand to relieve any remaining pressure.
• Remove the lower splash shielding fasteners (if equipped) using a 7mm socket and flat trim clip tool.
• Drain the coolant from the radiator drain (if equipped) using an 8mm socket, or disconnect the lower radiator hose clamp using pliers (if clamp style allows).

Step 2: Remove the right-front wheel and inner splash shield

• Remove the wheel using an 19mm socket (if your lug nuts are OEM size; some are 19mm).
• Remove the fender liner/splash shield fasteners using a 7mm socket, 8mm socket, and flat trim clip tool.

Step 3: Support the engine (for right mount removal if needed)

• Position a floor jack under the engine with a wood block between the jack pad and oil pan.
• Raise the jack just enough to support engine weight (do not lift the car).
• Tip: Watch the engine—lift only a little.

Step 4: Remove the serpentine belt

• Rotate the belt tensioner using a serpentine belt tool with the correct socket end (commonly 15mm).
• Slide the belt off one pulley, then remove the belt completely.
• Serpentine belt tool = long handle for tight access.

Step 5: Remove the right engine mount (if it blocks access)

• Remove the mount fasteners using an 18mm socket and 15mm socket, as equipped.
• Remove any mount bracket fasteners using a 13mm socket.
• Set the mount aside and keep bolts grouped by location.

Step 6: Remove the water pump pulley (if equipped)

• Hold the pulley by hand and remove pulley bolts using a 10mm socket.
• If the pulley wants to spin, reinstall the belt loosely to hold it while you crack the bolts loose, then remove the belt again using the serpentine belt tool.

Step 7: Disconnect hoses at the water pump (as needed)

• Use pliers or a flathead screwdriver (depending on clamp type) to loosen the clamps.
• Twist the hose gently by hand to break it free, then pull it off.
• Catch remaining coolant with the drain pan.

Step 8: Remove the water pump

• Remove the water pump bolts using an 8mm socket and/or 10mm socket (bolt heads can vary by pump design).
• Pull the pump away from the engine. If stuck, tap gently with the handle of a ratchet—do not pry hard on sealing surfaces.
• Clean the mating surface using a plastic scraper and shop towels.

Step 9: Install the new water pump

• Install the new gasket/O-ring on the new pump (match original orientation).
• Position the pump and start all bolts by hand to prevent cross-threading.
• Tighten evenly using a torque wrench: Torque to 10 Nm (89 in-lbs).

Step 10: Reinstall pulley, mount, belt, and shields

• Reinstall the water pump pulley bolts using a 10mm socket: Torque to 10 Nm (89 in-lbs).
• Reinstall the right engine mount and bracket using an 18mm socket and 13mm socket: Torque to 80 Nm (59 ft-lbs) for mount-to-engine fasteners, and Torque to 60 Nm (44 ft-lbs) for mount-to-body fasteners.
• Install the serpentine belt using the serpentine belt tool. Make sure it’s centered on every pulley.
• Reinstall the splash shield/fender liner using a 7mm socket and flat trim clip tool.
• Reinstall the wheel using an 19mm socket: Torque to 135 Nm (100 ft-lbs).

Step 11: Refill and bleed the cooling system

• Close the radiator drain (if opened) using an 8mm socket.
• Fill the reservoir slowly using a funnel (or spill-free funnel kit (specialty)) with the correct 50/50 mix coolant.
• Reconnect the battery using a 10mm socket (positive first if removed, negative last).
• Start the engine and set heat to max (full hot). Let it idle until it reaches normal temperature.
• Top off coolant as the level drops. Watch for leaks at the pump and hose connections.

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✅ After Repair

• With the engine at operating temp, verify the cabin heater blows hot and the temperature gauge stays normal.
• Shut the engine off, let it cool fully, then recheck and top off the coolant level.
• Inspect for leaks over the next 2–3 drives (especially after a full heat-soak/cool-down cycle).
• Dispose of old coolant properly (most parts stores accept used coolant).

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💰 DIY vs Shop Cost

Shop Cost: $550-$950 (parts + labor)

DIY Cost: $90-$260 (parts only)

You Save: $290-$860 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 3-5 hours.

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🎯 Ready to get started?

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