🔧 Altima - Water Pump Replacement

Your Altima’s 3.5L V6 water pump is mounted behind the front timing cover and is driven by the timing chain. This is a major repair because the timing cover must be removed and the timing chain must stay correctly aligned.

Difficulty Level: Advanced | Estimated Time: 8-12 hours

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⚠️ Safety & Precautions

• ⚠️ Work only on a cold engine. Hot coolant can spray out and burn you.
• ⚠️ Disconnect the negative battery cable before removing engine mount and timing cover parts.
• ⚠️ Support your Altima with jack stands. Never rely on a floor jack alone.
• ⚠️ The water pump is timing-chain driven. If the chain slips, serious engine damage can happen.
• ⚠️ Do not rotate the crankshaft or camshafts with the timing chain loose.
• ⚠️ Coolant is poisonous. Keep it away from children, pets, and drains.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 12mm socket
• 14mm socket
• 17mm socket
• 19mm socket
• 21mm socket
• 22mm socket
• 3/8-inch drive ratchet
• 1/2-inch drive breaker bar
• 3/8-inch drive torque wrench
• 1/2-inch drive torque wrench
• Socket extension set
• Universal joint socket adapter
• Flat-blade screwdriver
• Trim clip removal tool
• Pliers set
• Hose clamp pliers
• Serpentine belt tool
• Crankshaft pulley holder (specialty)
• Harmonic balancer puller (specialty)
• Engine support bar (specialty)
• Cooling system vacuum fill tool (specialty)
• Coolant funnel kit
• OBD2 scan tool
• Paint marker
• Plastic scraper
• Brake cleaner spray
• Drain pan
• Shop towels
• Floor jack (rated 2-ton minimum)
• Jack stands (rated 2-ton minimum)
• Safety glasses
• Nitrile gloves

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Water pump - Qty: 1
• Water pump O-ring seal - Qty: 1
• Timing cover RTV sealant - Qty: 1
• Front crankshaft seal - Qty: 1
• Timing chain tensioner gasket - Qty: 1
• Nissan-compatible blue long-life coolant - Qty: 2 gallons
• Serpentine belt - Qty: 1
• Engine oil - Qty: 5 quarts
• Oil filter - Qty: 1
• Oil drain plug washer - Qty: 1

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📋 Before You Begin

• 📋 Park your Altima on level ground, shift to Park, and set the parking brake.
• 📋 Let the engine cool fully before opening the radiator cap.
• 📋 Take photos before removing hoses, wiring clips, brackets, and the belt.
• 📋 Make a cardboard bolt map because timing cover bolts are different lengths.
• 📋 Disconnect the negative battery cable using a 10mm socket.
• 📋 RTV sealant is liquid gasket maker that cures into a rubber-like seal.
• 📋 A torque wrench tightens bolts to an exact measured tightness.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Lift and Secure the Vehicle

• Use a floor jack to lift the front of your Altima.
• Place jack stands under the front support points.
• Lower the vehicle gently onto the jack stands.
• Wear safety glasses and nitrile gloves.
• Shake-test before going underneath.

Step 2: Remove the Lower Engine Shield

• Use a trim clip removal tool to remove the plastic clips.
• Use a 10mm socket to remove the lower shield bolts.
• Remove the lower engine shield and set it aside.

Step 3: Drain the Coolant

• Place a drain pan under the radiator drain.
• Remove the radiator cap only when cold.
• Use pliers if needed to open the radiator drain valve gently.
• Let the coolant drain completely.
• Close the drain valve by hand. Do not overtighten it.

Step 4: Remove the Right Front Wheel and Fender Liner

• Use a 21mm socket to remove the right front lug nuts.
• Remove the right front wheel.
• Use a trim clip removal tool and 10mm socket to remove fender liner clips and bolts.
• Move the liner aside for access to the crankshaft pulley.

Step 5: Remove the Serpentine Belt

• Take a clear photo of the belt path before removing it.
• Use a serpentine belt tool on the belt tensioner.
• The tensioner is a spring-loaded arm that keeps the belt tight.
• Rotate the tensioner and slide the belt off the pulleys.

Step 6: Support the Engine

• Install an engine support bar across the upper body support points.
• An engine support bar holds the engine from above while the mount is removed.
• Attach the support chain to a secure engine lifting point.
• Apply light tension only.

Step 7: Remove the Right Engine Mount

• Use a 14mm socket, 17mm socket, and socket extension set to remove the right engine mount fasteners.
• Use a universal joint socket adapter where the socket must work at an angle.
• Remove the mount and bracket from the timing cover area.
• Mark bolt locations with a paint marker.

Step 8: Remove the Crankshaft Pulley

• Install the crankshaft pulley holder to keep the pulley from turning.
• Use a 22mm socket and 1/2-inch drive breaker bar to loosen the crankshaft pulley bolt.
• A breaker bar is a long handle used to loosen very tight bolts.
• Use a harmonic balancer puller to pull the pulley straight off.
• Do not pry against the aluminum timing cover.

Step 9: Remove Timing Cover Attachments

• Use a 10mm socket, 12mm socket, and 14mm socket to remove brackets and small covers attached to the front timing cover.
• Use hose clamp pliers to move hose clamps if hoses block access.
• Use a flat-blade screwdriver carefully to release plastic wiring retainers.
• Place every bolt into your cardboard bolt map.

Step 10: Remove the Front Timing Cover

• Use a 10mm socket, 12mm socket, and 14mm socket to remove the timing cover bolts.
• Use a plastic scraper to gently separate the cover from the engine.
• Remove the cover slowly and check for hidden bolts if it does not come free.
• Do not force it with a metal screwdriver.

Step 11: Mark the Timing Chain

• Thread the crankshaft bolt back in by hand.
• Use a 22mm socket to rotate the engine clockwise only.
• Use a paint marker to mark the chain and sprocket positions before loosening anything.
• Timing marks help keep the camshafts and crankshaft synchronized.

Step 12: Lock the Timing Chain Tensioner

• Use a 10mm socket to access the chain tensioner area.
• The tensioner keeps the timing chain tight during engine operation.
• Use the pliers set to compress and lock the tensioner in the retained position.
• Keep the chain seated on the sprockets.

Step 13: Remove the Old Water Pump

• Use a 10mm socket to remove the water pump bolts.
• Pull the water pump straight out.
• Remove the old O-ring seal.
• Use a plastic scraper, brake cleaner spray, and shop towels to clean the sealing surface.
• Keep debris out of the engine.

Step 14: Install the New Water Pump

• Lightly wet the new O-ring with clean coolant.
• Install the O-ring on the new water pump.
• Push the water pump straight into place.
• Use a 10mm socket to start all bolts by hand.
• Use a 3/8-inch drive torque wrench to tighten the water pump bolts evenly.
• Torque to 9-11 Nm (80-97 in-lbs)

Step 15: Release Tensioner and Check Timing

• Use the pliers set to release the timing chain tensioner lock.
• Use a 22mm socket to rotate the crankshaft clockwise two full turns by hand.
• Stop immediately if you feel hard resistance.
• Confirm your painted timing marks return to their correct relationship.

Step 16: Clean the Timing Cover Surfaces

• Use a plastic scraper to remove old RTV from the timing cover and engine.
• Use brake cleaner spray and shop towels to clean the surfaces until dry.
• Install the new front crankshaft seal if the old seal is worn, leaking, or removed.

Step 17: Reinstall the Front Timing Cover

• Apply timing cover RTV sealant in a continuous bead along the factory sealing path.
• Set the timing cover in place carefully without smearing the RTV.
• Use a 10mm socket, 12mm socket, and 14mm socket to start all bolts by hand.
• Use a 3/8-inch drive torque wrench to tighten bolts gradually from the center outward.
• Torque small timing cover bolts to 9-12 Nm (80-106 in-lbs)
• Torque larger timing cover bolts to 22-28 Nm (16-21 ft-lbs)

Step 18: Reinstall the Crankshaft Pulley

• Slide the crankshaft pulley onto the crankshaft by hand.
• Install the crankshaft pulley bolt.
• Use the crankshaft pulley holder to hold the pulley still.
• Use a 22mm socket and 1/2-inch drive torque wrench to tighten the bolt.
• Torque to 44 Nm (33 ft-lbs), then turn an additional 84-90 degrees
• Use a paint marker to mark the bolt before the angle turn.

Step 19: Reinstall the Engine Mount

• Use a 14mm socket and 17mm socket to reinstall the right engine mount and bracket.
• Start all bolts by hand before tightening.
• Use a 3/8-inch drive torque wrench or 1/2-inch drive torque wrench as needed.
• Tighten the mount fasteners to the specification supplied with the replacement fastener set or current Nissan service data for each fastener location.
• Remove the engine support bar only after the mount is fully secured.

Step 20: Reinstall the Serpentine Belt

• Route the new belt around the pulleys using your photo.
• Use the serpentine belt tool to rotate the tensioner.
• Slide the belt over the final pulley.
• Release the tensioner slowly.
• Check that the belt ribs sit fully in every pulley groove.

Step 21: Reinstall Fender Liner, Wheel, and Shield

• Use a trim clip removal tool and 10mm socket to reinstall the right fender liner.
• Install the right front wheel.
• Use a 21mm socket and 1/2-inch drive torque wrench to tighten the lug nuts in a star pattern.
• Torque to 113 Nm (83 ft-lbs)
• Use a 10mm socket and trim clip removal tool to reinstall the lower engine shield.

Step 22: Refill and Bleed the Cooling System

• Use a cooling system vacuum fill tool if available to reduce trapped air.
• If filling manually, install a coolant funnel kit at the radiator fill neck.
• Fill with Nissan-compatible blue long-life coolant.
• Reconnect the negative battery cable using a 10mm socket.
• Start the engine and set the heater to full hot.
• Let the engine warm up while watching coolant level and temperature.
• Add coolant as bubbles leave the system.
• Install the radiator cap once the level stays steady.

Step 23: Change the Engine Oil

• Place a drain pan under the oil pan.
• Use a 14mm socket to remove the oil drain plug.
• Let the oil drain fully.
• Install a new oil drain plug washer.
• Use a 3/8-inch drive torque wrench to tighten the drain plug.
• Torque to 34 Nm (25 ft-lbs)
• Install the new oil filter hand-tight.
• Refill the engine with fresh engine oil.

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✅ After Repair

• ✅ Check for coolant leaks near the timing cover, water pump area, hoses, and radiator drain.
• ✅ Check for oil leaks near the timing cover, crankshaft seal, oil filter, and drain plug.
• ✅ Use an OBD2 scan tool to monitor coolant temperature during warm-up.
• ✅ Confirm the heater blows hot air at idle.
• ✅ Road test gently, then let the engine cool and recheck coolant level.
• ✅ Stop immediately if the engine overheats, rattles, or sets cam/crank timing codes.

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💰 DIY vs Shop Cost

Shop Cost: $1,200-$2,000 (parts + labor)

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

You Save: $750-$1,550 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 7-10 hours.

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🎯 Ready to get started?

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