🔧 Accord - Water Pump Replacement

Your Accord’s water pump circulates coolant through the engine and radiator. If it’s leaking, noisy, or the bearing is failing, replacing the pump prevents overheating and major engine damage.

Difficulty Level: Advanced | Estimated Time: 3-5 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 on solid, level ground (never rely on a jack alone).
• ⚠️ Coolant is toxic—use a drain pan and clean spills immediately.
• ⚠️ Keep hands/clothes clear of the belt path during checks.
• Disconnecting the battery is not required, but it’s OK to remove the 10mm negative terminal if you want extra safety around moving parts.

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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 10-quart)
• Funnel
• 10mm socket
• 12mm socket
• 14mm socket
• 3/8" drive ratchet
• 3/8" drive extensions (3" and 6")
• Torque wrench (3/8" drive)
• Serpentine belt tool or long-handled 14mm wrench
• Phillips screwdriver
• Trim clip remover
• Plastic gasket scraper
• Shop rags
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Water pump - Qty: 1
• Water pump O-ring / gasket - Qty: 1
• Honda Type 2 coolant (premixed 50/50) - Qty: 2 gallons
• Serpentine drive belt - Qty: 1 Recommended while you’re 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 (cold upper radiator hose is a good sign).
• Set the HVAC temperature to full hot (helps bleed air later).
• Plan to capture and properly dispose of old coolant.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise the front and remove the splash shielding

• Use floor jack to lift the front of the car and set it on jack stands.
• Remove the lower engine cover/splash shield using a Phillips screwdriver and trim clip remover.

Step 2: Drain the coolant

• Place a drain pan under the radiator drain.
• Slowly remove the radiator cap by hand (only when cold).
• Open the radiator drain and let coolant fully drain into the pan.
• Tip: keep pets away—coolant is sweet and deadly.

Step 3: Remove the serpentine belt

• Locate the belt tensioner.
• Use a serpentine belt tool or long-handled 14mm wrench to rotate the tensioner and relieve belt tension.
• Slip the belt off a smooth pulley first, then remove it completely.
• A belt routing photo helps reassembly.

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

• Hold the pulley from turning by keeping light belt tension on it, or hold it by hand carefully.
• Use a 10mm socket (or the fastener size present) and 3/8" drive ratchet to remove the pulley bolts.
• Remove the pulley and set it aside.
• Torque to 12 Nm (9 ft-lbs) (pulley bolts, during reassembly).

Step 5: Remove the water pump

• Place shop rags under the pump area—more coolant will spill.
• Use a 10mm socket and 3/8" drive ratchet to remove the water pump mounting bolts.
• Pull the water pump straight off the engine block.
• Remove the old O-ring / gasket from the pump or engine side.

Step 6: Clean the sealing surface

• Use a plastic gasket scraper and shop rags to clean the mating surface until it’s smooth and dry.
• Do not gouge the aluminum surface.

Step 7: Install the new water pump

• Install the new O-ring / gasket onto the new pump.
• Position the pump on the engine and hand-start all bolts.
• Tighten evenly using a 10mm socket.
• Torque to 12 Nm (9 ft-lbs) (water pump mounting bolts).

Step 8: Reinstall the pulley and belt

• Reinstall the water pump pulley and start bolts by hand.
• Tighten using a 10mm socket and torque wrench.
• Torque to 12 Nm (9 ft-lbs) (pulley bolts).
• Route the belt correctly, then use the serpentine belt tool or long-handled 14mm wrench to move the tensioner and slip the belt on.
• Visually confirm the belt is fully seated in every pulley groove.

Step 9: Reinstall shields and lower the car

• Reinstall the splash shield using the Phillips screwdriver and trim clip remover.
• Use the floor jack to lift slightly, remove jack stands, and lower the car.

Step 10: Refill and bleed the cooling system

• Fill the radiator with Honda Type 2 coolant using a funnel.
• Fill the overflow reservoir to the MAX line.
• Start the engine and let it idle with the heater set to hot.
• Watch for bubbles and keep topping off as the level drops.
• Once the cooling fans cycle on/off and heat is steady inside the cabin, shut the engine off and let it cool.
• Recheck radiator and reservoir levels and top off as needed.

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✅ After Repair

• Check for leaks around the water pump with a flashlight after the first warm-up.
• Recheck coolant level the next morning (cold engine) and top off if needed.
• Listen for belt squeal—if present, re-check belt routing and seating.

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💰 DIY vs Shop Cost

Shop Cost: $650-$1,000 (parts + labor)

DIY Cost: $120-$260 (parts only)

You Save: $530-$740 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?

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.