🔧 Traverse - Water Pump Replacement

On your Traverse’s 3.6L V6, the water pump is driven by the timing chain and sits behind the engine front cover. Replacing it is a big job because you must remove the front cover and manage timing components carefully to avoid engine damage.

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

Assumption: 3.6L timing-chain-driven internal water pump (most 2016 Traverse 3.6L).

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⚠️ Safety & Precautions

• ⚠️ Never open the coolant system hot; let it cool fully.
• ⚠️ Support the vehicle with jack stands before working underneath.
• ⚠️ Disconnect the negative battery cable to prevent accidental cranking.
• ⚠️ Keep the timing chain area clean; dirt can cause rapid wear.
• ⚠️ If you disturb cam/crank timing, the engine can be damaged on start-up.

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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 10-quart)
• Funnel
• Shop towels
• Plastic trim clip remover
• Serpentine belt tool 15mm
• 1/4" drive ratchet
• 3/8" drive ratchet
• 1/2" drive breaker bar
• Torque wrench (10-150 ft-lbs)
• Torque angle gauge (specialty)
• Socket set (8mm-24mm)
• E-Torx socket set (E8-E14)
• Torx bit set (T20-T50)
• Extensions (3", 6", 12")
• Swivel adapter 3/8"
• Flat screwdriver
• Pry bar
• Harmonic balancer puller kit (specialty)
• Harmonic balancer installer kit (specialty)
• Engine support bar (specialty)
• Gasket scraper (plastic)
• Razor scraper

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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 front cover gasket set - Qty: 1
• Crankshaft balancer bolt - Qty: 1
• Dex-Cool coolant (50/50 premix) - Qty: 3-4 gallons
• RTV sealant (GM-spec) - Qty: 1
• Serpentine belt - Qty: 1
• Engine oil - Qty: 6 quarts
• Oil filter - Qty: 1

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📋 Before You Begin

• Park on level ground, set the parking brake, and chock the rear wheels.
• Disconnect the negative battery cable using a socket.
• Raise the front of the Traverse with a floor jack and set it on jack stands.
• Place a drain pan under the radiator drain area.
• Take photos as you go for bolt locations.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Drain the coolant

• Remove the coolant reservoir cap by hand only when the engine is cool.
• Open the radiator drain (or remove the lower hose) and drain into a drain pan.

Step 2: Remove the right front wheel and splash shields

• Use a socket set to remove the lug nuts and remove the wheel.
• Use a plastic trim clip remover and sockets to remove the inner fender liner/splash shields.

Step 3: Remove the serpentine belt

• Use a serpentine belt tool 15mm to rotate the tensioner and slip the belt off.
• Draw the belt routing before removal.

Step 4: Support the engine and remove the right engine mount

• Install an engine support bar (a bar that holds the engine from above) and take the engine’s weight.
• Use sockets and E-Torx sockets to remove the right engine mount and bracket hardware.
• Torque all mount fasteners to GM service specification on reassembly.

Step 5: Remove front accessory brackets as needed

• Use sockets/E-Torx sockets to remove any brackets blocking the front cover.
• Move components aside without stressing hoses/wires; use shop towels to protect surfaces.

Step 6: Remove the harmonic balancer (crank pulley)

• Use a breaker bar and the correct socket to remove the crankshaft balancer bolt.
• Use a harmonic balancer puller kit to pull the balancer off.
• Never pry on the balancer sealing surface.

Step 7: Remove the engine front cover

• Use sockets and E-Torx sockets to remove all front cover bolts (note lengths/locations).
• Use a pry bar gently at the designated pry points to separate the cover.
• Use a drain pan and towels; more coolant/oil may drip when the cover comes off.

Step 8: Lock in timing position and manage the timing chain tension

• Rotate the engine by hand only using a socket on the crankshaft until timing marks align.
• Relieve and secure timing chain tension per GM procedure before removing the pump.
• If timing marks don’t make sense, stop.

Step 9: Remove the water pump

• Use sockets to remove the water pump fasteners.
• Remove the water pump and gasket/O-ring.
• Clean the sealing surface with a plastic gasket scraper and shop towels.

Step 10: Install the new water pump

• Install the new gasket/O-ring on the new pump.
• Position the pump and hand-start all bolts.
• Tighten evenly using a torque wrench.
• Torque water pump fasteners to GM service specification.

Step 11: Reinstall the front cover with correct sealant points

• Clean the front cover mating surfaces with a razor scraper carefully.
• Install the front cover gasket set.
• Apply RTV sealant only at the GM-specified joints/seams, then install the cover.
• Hand-start bolts, then tighten in sequence using a torque wrench.
• Torque front cover fasteners to GM service specification.

Step 12: Reinstall the harmonic balancer with a new bolt

• Use a harmonic balancer installer kit to press the balancer on straight.
• Install a new crankshaft balancer bolt.
• Use a torque wrench and torque angle gauge to tighten.
• Torque crankshaft balancer bolt to GM torque-plus-angle specification.

Step 13: Reinstall the engine mount, belt, shields, and wheel

• Reinstall the right engine mount and bracket using sockets and E-Torx sockets.
• Torque all mount fasteners to GM service specification.
• Install the serpentine belt using the serpentine belt tool 15mm.
• Reinstall splash shields and the wheel using a socket set.
• Torque wheel lug nuts to GM service specification.

Step 14: Refill coolant and bleed air

• Close the radiator drain and refill with Dex-Cool coolant using a funnel.
• Start the engine and set the heater to HOT to help purge air.
• Top off as the level drops, and watch for leaks.

Step 15: Change the oil if contaminated

• If you saw coolant/oil mixing at disassembly, change engine oil and filter using sockets and a drain pan.

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✅ After Repair

• Recheck coolant level after the first full warm-up and after the next drive.
• Inspect for leaks around the front cover, water pump area, and hoses.
• Listen for abnormal chain noise; shut off immediately if heard.
• Verify cabin heat works and engine temperature stays normal.

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💰 DIY vs Shop Cost

Shop Cost: $1,200-$2,500 (parts + labor)

DIY Cost: $250-$700 (parts only)

You Save: $500-$1,800 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 8-12 hours.

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🎯 Ready to get started?

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