🔧 1500 - Water Pump Replacement

The water pump circulates coolant through your A/C-heater and engine to prevent overheating. On your 1500’s 5.7L, replacement involves draining coolant, removing the fan/shroud (if equipped), taking off the serpentine belt, and unbolting the pump.

Difficulty Level: Intermediate | Estimated Time: 2-4 hours

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⚠️ Safety & Precautions

• ⚠️ Never open the cooling system hot; wait until fully cool.
• ⚠️ Keep hands/tools clear of the fan; disconnect the battery before working near the fan/clutch.
• ⚠️ Coolant is toxic; use a drain pan and clean spills immediately.
• ⚠️ Support the truck safely if you raise it; never rely on a jack alone.

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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)
• Spill-free coolant funnel kit
• 1/4" drive ratchet
• 3/8" drive ratchet
• 3/8" drive torque wrench (10–100 ft-lbs range)
• 10mm socket
• 13mm socket
• 15mm socket
• Flat-blade screwdriver
• Hose clamp pliers
• Pick tool
• Plastic gasket scraper
• Brake cleaner spray
• Shop rags
• Serpentine belt tool (specialty)
• 36mm fan clutch wrench (specialty)
• Fan pulley holding tool (specialty)

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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
• Engine coolant (Mopar OAT meeting MS-12106, purple) premix - Qty: 2-3 gallons
• Radiator hose clamp(s) (if originals are weak/damaged) - Qty: 1-3
• Serpentine belt (optional, if cracked/glazed) - 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 (upper radiator hose should feel cool).
• Disconnect the negative battery cable using a 10mm socket.
• If you raise the front, lift with a floor jack and support with jack stands.
• Take a quick photo of the belt routing.

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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 area.
• Open the radiator drain (petcock) using a flat-blade screwdriver (some turn by hand).
• Remove the coolant reservoir cap by hand to help it drain (only when cool).

Step 2: Remove the intake duct (for working room)

• Loosen the clamps with a flat-blade screwdriver and lift the intake duct out.
• Set it aside where it won’t get dirt inside.

Step 3: Remove the fan/shroud (two common setups)

• If you have a mechanical fan clutch:
• Remove shroud fasteners using a 10mm socket.
• Hold the pulley with a fan pulley holding tool (specialty).
• Loosen the fan clutch nut using a 36mm fan clutch wrench (specialty), then lift the fan and shroud out together.
• If you have an electric fan:
• Unplug the fan connector by hand (use a pick tool gently on the lock tab if needed).
• Remove the fan/shroud bolts using a 10mm socket and lift the assembly out.
• Go slow—radiator fins bend easily.

Step 4: Remove the serpentine belt

• Rotate the belt tensioner using a 15mm socket and a serpentine belt tool (specialty).
• Slip the belt off one upper pulley, then release the tensioner slowly.
• Remove the belt from the water pump pulley area and set it aside.

Step 5: Disconnect hoses from the water pump

• Use hose clamp pliers to move spring clamps back on the hose.
• Twist the hose gently to break it loose; use a pick tool carefully if it’s stuck.
• Pull hoses off and aim them into the drain pan for remaining coolant.

Step 6: Remove the water pump

• Remove the water pump mounting bolts using a 13mm socket.
• Support the pump with one hand as the last bolts come out, then pull the pump straight off.
• Clean the mating surface using a plastic gasket scraper, then wipe with brake cleaner spray on shop rags.
• Don’t gouge the aluminum timing cover surface.

Step 7: Install the new water pump

• Install the new gasket/O-ring on the pump (dry unless the gasket instructions say otherwise).
• Position the pump and hand-start all bolts to avoid cross-threading.
• Tighten bolts evenly using a 13mm socket.
• Final tighten with a 3/8" drive torque wrench: Torque to 40 Nm (30 ft-lbs).

Step 8: Reconnect hoses

• Push hoses fully onto their fittings by hand.
• Reposition clamps using hose clamp pliers so they sit behind the hose bead.

Step 9: Reinstall the serpentine belt

• Route the belt using your photo (or the underhood belt diagram) by hand.
• Rotate the tensioner using a 15mm socket and serpentine belt tool (specialty), then slip the belt onto the last pulley.
• Visually confirm the belt is centered in every pulley groove.

Step 10: Reinstall the fan/shroud

• Mechanical fan clutch: Thread the fan clutch back on, snug it using a 36mm fan clutch wrench (specialty) while holding with the fan pulley holding tool (specialty), then reinstall shroud bolts with a 10mm socket.
• Electric fan: Reinstall bolts with a 10mm socket and reconnect the electrical plug by hand.

Step 11: Refill coolant and bleed air

• Close the radiator drain using a flat-blade screwdriver (snug only).
• Fill the cooling system using a spill-free coolant funnel kit with engine coolant (Mopar OAT meeting MS-12106, purple).
• Reconnect the negative battery cable using a 10mm socket.
• Start the engine and set the heater to HOT, fan on LOW.
• Let it warm up and watch the funnel level; add coolant as air burps out.
• When the thermostat opens (upper hose gets hot), keep topping up until stable.
• Shut the engine off, let it cool, then top off the reservoir to the MAX line.

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✅ After Repair

• Check for leaks around the water pump and hose connections with the engine running.
• Watch the temperature gauge on a 10–15 minute drive; it should stay normal.
• After a full cool-down, recheck coolant level in the reservoir and top off if needed.
• Listen for belt squeal; if present, re-check belt routing and pulley alignment.

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💰 DIY vs Shop Cost

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

DIY Cost: $140-$320 (parts only)

You Save: $330-$910 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 2-4 hours.

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🎯 Ready to get started?

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