🔧 Water Pump - Replacement

On your F-150 3.5L EcoBoost, the water pump is mounted behind the front timing cover and is driven by the timing chain. This is a major repair because the front of the engine has to come apart, and coolant contamination can damage the engine oil if the pump has been leaking.

Difficulty Level: Advanced | Estimated Time: 8-12 hours

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⚠️ Safety & Precautions

• Work only on a fully cooled engine. Hot coolant can cause severe burns.
• Drain coolant before opening the system. Keep coolant off the serpentine belt and electrical connectors.
• Battery disconnect is required before major front-engine disassembly.
• Replace engine oil and filter if there is any sign of coolant contamination.
• Timing components must be kept in the correct position. Do not rotate the crankshaft or camshafts once timing is set unless instructed.
• Use jack stands if you raise the truck. Never rely on a jack alone.

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🔧 Required Tools

You'll need the following tools for this repair:

• 8mm socket
• 10mm socket
• 12mm socket
• 13mm socket
• 15mm socket
• 18mm socket
• 1/4-inch ratchet
• 3/8-inch ratchet
• 1/2-inch breaker bar
• Torque wrench
• Serpentine belt tool (specialty)
• Timing chain holding tool (specialty)
• Harmonic balancer puller (specialty)
• Seal installer tool (specialty)
• Drain pan
• Floor jack (rated 3-ton minimum)
• Jack stands
• Safety glasses
• Nitrile gloves
• Plastic trim removal tool
• Scraper
• Funnel

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Water pump - Qty: 1
• Water pump gasket/seal - Qty: 1
• Front cover sealant - Qty: 1
• Engine coolant - Qty: 1 refill
• Engine oil - Qty: 1 refill if contaminated
• Oil filter - Qty: 1 if contaminated
• Serpentine belt - Qty: 1 if worn or coolant-soaked
• Thermostat housing gasket - Qty: 1 if removed
• Front timing cover gasket set - Qty: 1
• One-time-use bolts - Qty: 1 set if required during reassembly

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool completely.
• Disconnect the negative battery cable before starting.
• Raise the front of the truck only if needed for splash shield access, then support it with jack stands.
• Have a clean container ready for coolant.
• Tip: Label bolts as you remove them.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Drain the coolant

• Use a drain pan under the radiator drain area and open the drain carefully.
• Remove the coolant reservoir cap slowly to release pressure.
• Drain enough coolant to get the system level below the water pump.

Step 2: Disconnect power and remove access parts

• Use a 10mm socket to disconnect the negative battery cable.
• Remove the air intake ducting and any covers blocking front-engine access using an 8mm socket and plastic trim removal tool.
• Remove the serpentine belt using the serpentine belt tool (specialty).
• Tip: Take a quick photo before belt removal.

Step 3: Remove the front drive components

• Use a 15mm socket and breaker bar to remove the crankshaft pulley bolt.
• Remove the crankshaft pulley/harmonic balancer with the harmonic balancer puller (specialty).
• Remove the front splash shield if needed using an 8mm socket or 10mm socket.

Step 4: Remove timing cover-related components

• Remove any brackets, accessory fasteners, and covers blocking the timing cover with 10mm, 12mm, and 13mm sockets.
• If the engine mount bracket blocks access, support the engine with a jack and wood block, then remove the bracket fasteners.
• Keep all timing components clean and dry.

Step 5: Set and secure engine timing

• Rotate the engine only as needed to the timing position using the crankshaft bolt and a breaker bar.
• Install the timing chain holding tool (specialty) to keep the timing components aligned.
• Do not rotate the crankshaft or camshafts after timing is locked.
• Tip: Mark the chain before disassembly.

Step 6: Remove the front timing cover

• Use a 10mm socket and 12mm socket to remove the timing cover bolts.
• Break the seal gently and remove the cover without prying against sealing surfaces.
• Inspect the cover and gasket area for oil or coolant contamination.

Step 7: Remove the water pump

• Use a 10mm socket to remove the water pump bolts.
• Pull the water pump straight out from the housing.
• Remove the old gasket/seal and clean the mounting surface with a scraper.
• Make sure no old seal material remains in the cavity.

Step 8: Install the new water pump

• Install the new water pump gasket/seal in the correct position.
• Set the new water pump in place by hand first.
• Use a 10mm socket to tighten the bolts evenly in a crisscross pattern.
• Torque to 10 Nm (89 in-lbs) unless your service information for the exact build shows a different value.

Step 9: Reinstall the timing cover and front components

• Apply the correct front cover sealant at the specified joints.
• Reinstall the timing cover and all bolts with a 10mm socket and 12mm socket.
• Torque to 10-12 Nm (89-106 in-lbs) for small cover bolts unless otherwise specified by the service procedure.
• Reinstall the crankshaft pulley and tighten the bolt with a 15mm socket and torque wrench.
• Torque to 150 Nm (111 ft-lbs) plus angle if specified by Ford for your build.

Step 10: Reinstall accessories and refill fluids

• Reinstall brackets, intake parts, and the serpentine belt using the serpentine belt tool (specialty).
• Reconnect the negative battery cable with a 10mm socket.
• Refill the cooling system with the correct engine coolant using a funnel.
• If coolant entered the oil, change the oil and filter before starting the engine.

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✅ After Repair

• Start the engine and let it idle while checking for coolant leaks.
• Watch coolant level and top off as air bleeds out of the system.
• Confirm normal operating temperature and heater output.
• Recheck the coolant level after the first heat cycle and again after a short drive.
• If the old pump leaked internally, verify oil condition after a short run.
• Tip: Recheck every hose connection twice.

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💰 DIY vs Shop Cost

Shop Cost: $1,400-$2,400 (parts + labor)

DIY Cost: $180-$450 (parts only)

You Save: $950-$1,950 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 8-12 hours.

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🎯 Ready to get started?

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