🔧 TLX - Water Pump Replacement

On your TLX, the water pump circulates coolant through the engine and radiator. Replacing it typically involves draining coolant, removing the drive belt, unbolting the pump, and installing a new pump with a fresh gasket/O-ring.

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

Assumption: Procedure covers the belt-driven water pump on the 2.4L.

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⚠️ Safety & Precautions

• Work on a fully cold engine; hot coolant can cause severe burns.
• Use jack stands; never rely on a floor jack alone.
• Keep coolant off the ground; it is toxic to people and pets.
• Do not open the radiator cap when hot; pressure can spray coolant.
• Battery disconnect is not required, but keep hands clear of the cooling fans (they can turn on automatically).

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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 (pair, rated 3-ton minimum)
• Wheel chocks
• Drain pan (at least 10-quart)
• Funnel
• Shop towels
• Plastic trim clip tool
• Flat screwdriver
• Ratchet (3/8" drive)
• Socket set (8mm, 10mm, 12mm, 14mm)
• Wrench set (10mm, 12mm, 14mm)
• Serpentine belt tool (specialty)
• Torque wrench (10–80 ft-lbs range)
• Gasket scraper (plastic)
• Flashlight

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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 - Qty: 1
• Engine coolant (Acura Type 2 premix) - Qty: 2 gallons
• Serpentine drive belt - Qty: 1 Recommended if belt is worn/cracked

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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 (at least 2 hours).
• Set your heater to MAX HEAT before shutdown if possible; it helps purge air later.
• Raise the front of the car with a floor jack and support it on jack stands at the proper lift points.
• Remove the lower engine splash shield to access the belt and coolant drain.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the lower splash shield

• Use a plastic trim clip tool and flat screwdriver to remove the clips/screws holding the splash shield.
• Use a 10mm socket for any splash shield bolts.

Step 2: Drain the coolant

• Place a drain pan under the radiator drain (petcock).
• Slowly loosen the radiator cap to relieve any residual pressure (engine must be cold).
• Open the drain using a flat screwdriver (if slotted) or by hand, and let coolant drain fully.

Step 3: Remove the serpentine belt

• Take a quick photo of the belt routing with your phone for reference.
• Use a serpentine belt tool (specialty) to rotate the belt tensioner and slip the belt off a smooth pulley.
• Serpentine belt tool: a long handle that fits the tensioner to release belt tension safely.

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

• Hold the pulley from turning with a wrench set on the pulley bolts while loosening them with a 10mm socket (varies by pulley design).
• Remove the pulley and set it aside.

Step 5: Remove the water pump

• Position the drain pan under the pump area; more coolant will spill when the pump comes off.
• Use a 10mm socket (common) to remove the water pump mounting bolts.
• Gently break the seal and pull the pump off the engine.
• Remove the old gasket / O-ring.

Step 6: Clean the sealing surface

• Use a plastic gasket scraper to clean the engine’s water pump mating surface.
• Wipe clean with shop towels.
• Do not gouge the aluminum surface.

Step 7: Install the new water pump

• Install the new gasket / O-ring onto the new pump (match the original orientation).
• Position the pump and hand-start all bolts to avoid cross-threading.
• Tighten bolts evenly in a crisscross pattern using a ratchet (3/8" drive).
• Final tighten with a torque wrench: Torque to 12 Nm (9 ft-lbs).

Step 8: Reinstall the water pump pulley (if removed)

• Install the pulley and start the bolts by hand.
• Snug with a 10mm socket, then final tighten with a torque wrench: Torque to 12 Nm (9 ft-lbs).

Step 9: Reinstall the serpentine belt

• Route the belt according to your photo.
• Use the serpentine belt tool (specialty) to move the tensioner and slide the belt fully onto the last pulley.
• Visually confirm the belt ribs are seated correctly on every grooved pulley.

Step 10: Reinstall the splash shield

• Reinstall the shield using the plastic trim clip tool, flat screwdriver, and 10mm socket as needed.

Step 11: Refill coolant and bleed air

• Lower the car off the jack stands using the floor jack (rated 3-ton minimum).
• Fill the radiator with Acura Type 2 premix coolant using a funnel.
• Fill the overflow bottle to the MAX line.
• Start the engine and let it idle with the heater on MAX HOT.
• Watch the temperature gauge and keep an eye on the coolant level; add coolant as the level drops.
• Once the cooling fan cycles on and off at least once, shut the engine off and let it cool completely.
• Recheck and top off the radiator and overflow bottle as needed.

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✅ After Repair

• Check for leaks around the water pump with a flashlight while idling.
• Verify the heater blows hot air (a cold heater can mean trapped air).
• Test drive 10–15 minutes, then recheck coolant level after a full cool-down.
• Look under the car for any fresh drips the next morning.

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💰 DIY vs Shop Cost

Shop Cost: $650-$1,050 (parts + labor)

DIY Cost: $90-$260 (parts only)

You Save: $560-$790 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?

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