🔧 Accord - Water Pump Replacement

On your Accord, the water pump circulates coolant through the engine and radiator. If it’s leaking or the engine is overheating, replacing the pump (and refilling/bleeding the cooling system) is the correct fix.

Difficulty Level: Intermediate | Estimated Time: 2.5-4.5 hours

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⚠️ Safety & Precautions

• ⚠️ Never open the radiator cap on a hot engine; let it cool fully.
• ⚠️ Support the car with jack stands; never rely on a jack alone.
• ⚠️ Keep coolant off paint and away from kids/pets; it’s toxic.
• ⚠️ If you remove an engine mount/bracket for access, support the engine with a jack and wood block first.
• 🔌 Battery disconnect is not required for the pump itself, but keep tools clear of the radiator fan (it can turn on).

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Safety glasses
• Nitrile gloves
• Drain pan (at least 2-gallon)
• Funnel
• Trim clip removal tool
• Phillips screwdriver
• 10mm socket
• 12mm socket
• 14mm socket
• 19mm socket
• 3/8" drive ratchet
• 3/8" drive extensions (3" and 6")
• Serpentine belt tool or long-handled 14mm box wrench
• Torque wrench (3/8" drive)
• Gasket scraper or plastic razor scraper
• Shop rags

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Water pump (engine coolant pump) with O-ring/gasket - Qty: 1
• Honda-compatible coolant (Type 2 / premix) - Qty: 2 gallons
• Serpentine belt - Qty: 1 (recommended while you’re in there)

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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 (upper radiator hose should feel cool).
• Turn the HVAC to HOT before bleeding later; this opens the heater circuit.
• If you end up needing extra clearance, be ready to support the engine from underneath with a jack and a wood block.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift the front-right corner and remove the splash shield

• Use a floor jack to lift the front-right jacking point and set the car on jack stands.
• Remove the right-front lower splash shield/inner fender access panel using a trim clip removal tool and Phillips screwdriver.

Step 2: Drain the coolant

• Place a drain pan under the radiator drain cock (bottom of radiator).
• Slowly remove the radiator cap (only when cool), then open the drain cock by hand or with a Phillips screwdriver if needed.
• Let coolant drain fully, then close the drain cock snugly (do not over-tighten).

Step 3: Remove the serpentine belt

• From the passenger-side access area, put a serpentine belt tool or long-handled 14mm box wrench on the belt tensioner hex.
• Rotate the tensioner to relieve belt tension, then slip the belt off one pulley and remove the belt.
• Tip: Take a belt routing photo first.

Step 4: Remove the water pump pulley (if equipped)

• Hold the pulley from turning by keeping tension on it by hand, and remove the small pulley bolts using a 10mm socket.
• Remove the pulley and set it aside.

Step 5: Remove the water pump

• Put rags under the pump area to catch remaining coolant.
• Remove the water pump mounting bolts using a 12mm socket and extensions.
• Pull the pump straight off the engine. More coolant will spill—keep the drain pan positioned.
• Remove the old O-ring/gasket and clean the mating surface using a gasket scraper or plastic razor scraper.
• Tip: Don’t gouge the aluminum surface.

Step 6: Install the new water pump

• Lightly wet the new O-ring with fresh coolant, then place it on the new pump.
• Install the pump onto the engine and hand-start all bolts.
• Tighten the mounting bolts evenly with a 12mm socket, then use a torque wrench: Torque to 12 N·m (9 ft-lbs).

Step 7: Reinstall the pulley and serpentine belt

• Reinstall the water pump pulley and start bolts by hand, then tighten with a 10mm socket: Torque to 12 N·m (9 ft-lbs).
• Route the belt per your photo, rotate the tensioner with the serpentine belt tool or 14mm box wrench, and slip the belt into place.
• Double-check the belt is fully seated in every pulley groove using a flashlight.

Step 8: Refill and bleed the cooling system

• Make sure the radiator drain cock is closed.
• Fill the radiator slowly using a funnel with Honda-compatible coolant (Type 2 / premix) until full.
• Fill the overflow reservoir to the MAX line.
• Start the engine and let it idle with the radiator cap off until the thermostat opens (upper radiator hose gets hot).
• As the level drops, add coolant as needed. Squeeze the upper radiator hose gently to help push air out.
• Once bubbles stop and the level stabilizes, install the radiator cap.
• Let the engine reach operating temperature and confirm the cabin heat blows hot.

Step 9: Reinstall splash shield and lower the car

• Reinstall the splash shield/inner panel using the trim clip removal tool and Phillips screwdriver.
• Lower the car using the floor jack.

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✅ After Repair

• With the engine running, inspect around the water pump for leaks using a flashlight.
• Take a short 10–15 minute drive, then recheck the coolant level in the overflow bottle after it cools; top off to MAX if needed.
• Watch the temperature gauge over the next few trips; any overheating means there’s likely trapped air or a leak.

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💰 DIY vs Shop Cost

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

DIY Cost: $90-$220 (parts only)

You Save: $460-$730 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2.5-4.0 hours.

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🎯 Ready to get started?

HowToo makes it easy: same-day/2-day shipping on every part, plus all the tools and specialty tools you need! Check out the parts and tools sections below to add everything to your cart.