🔧 Tundra - Water Pump Replacement

The water pump circulates coolant through your Tundra’s engine and radiator. If it’s leaking (coolant drip at the front of the engine) or the bearing is failing (wobble/noise), replacing the pump prevents overheating and engine damage.

Difficulty Level: Advanced | Estimated Time: 3-6 hours

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⚠️ Safety & Precautions

• 🧯 Only work on a fully cool engine; hot coolant can cause severe burns.
• 🧤 Support the truck with jack stands if you raise it; never rely on a jack alone.
• ⚡ Disconnect the negative battery terminal to prevent accidental fan/engine cranking while your hands are near the fan and belt.
• 🧪 Use a drain pan and dispose of coolant properly; it’s toxic to people and pets.

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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 3-gallon)
• Funnel
• Trim clip remover
• 10mm socket
• 12mm socket
• 14mm socket
• 3/8" ratchet
• 3/8" torque wrench (10–80 ft-lbs range)
• Socket extensions (3" and 6")
• Serpentine belt tool (specialty)
• Hose clamp pliers (specialty)
• Plastic gasket scraper
• Shop towels

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Water pump assembly - Qty: 1
• Water pump gasket / O-ring - Qty: 1
• Toyota Super Long Life Coolant (pink, premixed) - Qty: 3-4 gallons
• Serpentine drive belt - Qty: 1
• Hose clamps (assorted) - Qty: 1

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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 (best: overnight).
• Disconnect the battery negative cable using a 10mm socket.
• If you need more room underneath, raise the front with a floor jack and support with jack stands.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Drain the coolant

• Place a drain pan (at least 3-gallon) under the radiator drain.
• Slowly remove the radiator cap (only when cool) to release any residual pressure.
• Open the radiator drain and drain the coolant into the pan.

Step 2: Remove the upper fan shroud

• Remove any plastic clips/fasteners using a trim clip remover.
• Remove the upper shroud bolts using a 10mm socket and 3/8" ratchet.
• Lift the upper shroud up and set it aside.

Step 3: Remove the cooling fan and fan clutch

• Remove the fan clutch nuts from the water pump pulley using a 12mm socket and 3/8" ratchet.
• Carefully lift the fan and clutch out together.
• Tip: Don’t bend the radiator fins.
• Reinstall torque later: Torque to 13 Nm (115 in-lbs)

Step 4: Remove the serpentine belt

• Rotate the belt tensioner to relieve tension using a serpentine belt tool (specialty).
• Slip the belt off one pulley, then remove it completely.
• Take a quick photo of the belt routing before removal.

Step 5: Disconnect hoses at the water pump (as needed for access)

• Use hose clamp pliers (specialty) to move spring clamps back on the hose(s) at the pump/inlet.
• Twist the hose gently to break it loose, then pull it off.
• Catch remaining coolant with shop towels and the drain pan.

Step 6: Remove the water pump

• Remove the water pump mounting bolts using a 10mm socket and 12mm socket with extensions (3" and 6").
• Keep track of bolt locations (some may be different lengths). Lay them out in a pattern on a towel.
• Remove the water pump from the engine.

Step 7: Clean the sealing surface

• Use a plastic gasket scraper to remove old gasket material from the engine surface.
• Wipe clean with shop towels.
• Tip: Don’t gouge the aluminum surface.

Step 8: Install the new water pump

• Install the new gasket/O-ring onto the new pump (it should seat fully and evenly).
• Position the pump and hand-start all bolts to avoid cross-threading.
• Tighten bolts evenly in a crisscross pattern using a torque wrench.
• Torque to 21 Nm (15 ft-lbs)

Step 9: Reinstall hoses, belt, fan, and shroud

• Reconnect hose(s) and reinstall clamps using hose clamp pliers (specialty).
• Install the serpentine belt using a serpentine belt tool (specialty), following your photo/routing diagram.
• Reinstall the fan and fan clutch using a 12mm socket; Torque to 13 Nm (115 in-lbs).
• Reinstall the fan shroud using a 10mm socket.

Step 10: Refill and bleed the cooling system

• Close the radiator drain.
• Refill with Toyota Super Long Life Coolant (pink, premixed) using a funnel.
• Reconnect the battery negative terminal using a 10mm socket.
• Start the engine and set the heater to maximum heat, fan on low.
• Let it idle and watch the coolant level; top off as the level drops.
• Once at operating temperature, shut off, let cool, then recheck and top off the radiator and overflow tank.

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✅ After Repair

• Inspect for leaks around the pump and hose connections with the engine running.
• Verify the serpentine belt is centered on every pulley.
• Road test 10–15 minutes, then recheck coolant level after it cools.
• Watch the temperature gauge for the next few drives; overheating means air may still be trapped.

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💰 DIY vs Shop Cost

Shop Cost: $800-$1,400 (parts + labor)

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

You Save: $620-$950 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 3-6 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.