🔧 Fit - Water Pump Replacement

On your Fit, the water pump circulates coolant through the engine and radiator. If it’s leaking (often from the “weep hole”) or the bearing is noisy, replacement is the correct fix to prevent overheating and engine damage.

Difficulty Level: Intermediate | Estimated Time: 2.0-4.0 hours

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⚠️ Safety & Precautions

• ⚠️ Never open the radiator cap on a hot engine; coolant can spray and burn you.
• ⚠️ Support the car on jack stands on a level surface; never rely on a jack alone.
• ⚠️ Keep hands/tools away from the radiator fan; it can turn on unexpectedly.
• ⚠️ Coolant is toxic; keep it away from kids/pets and clean spills immediately.
• ⚠️ If you’ll be working near the alternator wiring a lot, disconnect the battery negative terminal.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• Wheel chocks
• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• Drain pan (at least 2-gallon)
• Funnel
• Trim clip remover (specialty)
• Phillips screwdriver
• Flathead screwdriver
• 3/8" drive ratchet
• 3/8" drive extension set
• 10mm socket
• 12mm socket
• 14mm socket
• 14mm wrench
• Torque wrench (3/8" drive, 5-80 ft-lbs range)
• Pliers
• Hose clamp pliers (specialty)
• Plastic gasket scraper
• Shop rags

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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
• Honda-compatible coolant (Type 2, premixed 50/50) - Qty: 1-2 gallons
• Accessory drive belt - Qty: 1 (recommended while you’re here)

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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 (best is sitting overnight).
• Plan to catch and properly dispose of old coolant (most parts stores accept it).
• If disconnecting the battery: use a 10mm socket to remove the negative terminal and isolate it so it can’t spring back.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Raise the front and remove the lower splash shield

• Use floor jack to lift the front jack point, then set the car on jack stands.
• Remove the lower engine cover/splash shield using a trim clip remover, Phillips screwdriver, and 10mm socket (fasteners vary).

Step 2: Drain the coolant

• Place a drain pan under the radiator drain.
• Slowly remove the radiator cap once the engine is fully cool.
• Open the radiator drain cock (typically hand-turn or with pliers, depending on style) and drain coolant completely.

Step 3: Remove the accessory drive belt

• Locate the belt tensioner.
• Use a 14mm wrench (or 14mm socket) on the tensioner hex and rotate to relieve belt tension.
• Slip the belt off one pulley, then remove it fully.
• Tip: Snap a quick belt-routing photo first.

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

• If your pump uses a pulley, remove the pulley bolts with a 10mm socket while holding the pulley from turning by hand.
• Remove the pulley and set it aside.
• Torque on reassembly: 10 N·m (7 ft-lbs) for small pulley bolts.

Step 5: Remove hoses or brackets that block access

• Use hose clamp pliers to move spring clamps back on any hose that prevents pump removal.
• Carefully twist the hose to break it loose, then pull it off. Use shop rags to catch remaining coolant.
• If a small bracket blocks access, remove it with a 10mm socket or 12mm socket as needed.

Step 6: Remove the water pump

• Remove the water pump mounting bolts using a 10mm socket and/or 12mm socket (bolt sizes can vary by location).
• Pull the water pump straight off the engine. More coolant will spill—keep the drain pan underneath.
• Remove the old gasket/O-ring.

Step 7: Clean the sealing surface

• Use a plastic gasket scraper to clean the engine’s sealing surface.
• Wipe clean with shop rags. The surface must be smooth and dry.
• Tip: Don’t gouge aluminum—go slow.

Step 8: Install the new water pump and gasket

• Install the new gasket/O-ring onto the new water pump (match the old setup exactly).
• Position the pump and start all bolts by hand first (prevents cross-threading).
• Tighten bolts evenly in a crisscross pattern using a 10mm socket/12mm socket.
• Torque: 12 N·m (9 ft-lbs) for water pump mounting bolts.

Step 9: Reinstall pulley, belt, and anything removed

• Reinstall the water pump pulley and tighten bolts with a 10mm socket.
• Torque: 10 N·m (7 ft-lbs) for small pulley bolts.
• Route the belt correctly, rotate the tensioner with a 14mm wrench, and slip the belt into place.
• Double-check the belt is fully seated in every pulley groove.

Step 10: Refill and bleed the cooling system

• Close the radiator drain cock.
• Use a funnel to fill the radiator with Honda-compatible Type 2 premixed coolant.
• Fill the overflow reservoir to the MAX line.
• Start the engine and set the heater to HOT (this helps move coolant through the heater core).
• Let it idle and watch the coolant level; add as needed. Keep an eye on temperature.
• When the radiator fan cycles on/off and the heat blows hot, shut the engine off and let it cool fully, then recheck/top off.

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✅ After Repair

• Check for leaks around the water pump and any hoses you touched.
• After the first drive and a full cool-down, recheck radiator and reservoir levels and top off if needed.
• Listen for belt squeal; if present, recheck belt routing and seating.
• Dispose of old coolant properly.

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💰 DIY vs Shop Cost

Shop Cost: $450-$850 (parts + labor)

DIY Cost: $90-$250 (parts only)

You Save: $200-$650 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2.0-3.5 hours.

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🎯 Ready to get started?

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