🔧 Pilot - Timing Belt Replacement

Your Pilot’s 3.5L V6 uses a timing belt to keep the crankshaft and camshafts synchronized. Replacing it on time prevents belt failure that can cause severe engine damage on this interference engine.

Difficulty Level: Advanced | Estimated Time: 5-8 hours

Assumption: Stock 3.5L V6 with standard OEM timing-belt layout.

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⚠️ Safety & Precautions

• ⚠️ Support the vehicle on jack stands before working under it.
• ⚠️ Support the engine before removing the right-side engine mount; the engine can drop if unsupported.
• ⚠️ Keep fingers/tools clear when releasing the timing belt tensioner; spring force can pinch.
• ⚠️ Let the engine cool fully if you’re replacing the water pump/coolant.
• ⚠️ Disconnect the negative battery cable to prevent accidental cranking.

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🔧 Required Tools

You'll need the following tools for this repair:

• Floor jack (rated 3-ton minimum)
• Jack stands (rated 3-ton minimum)
• Wheel chocks
• Safety glasses
• Mechanic gloves
• Trim clip removal tool
• 3/8" drive ratchet
• 1/2" drive breaker bar (24" minimum)
• Torque wrench (10-250 ft-lbs range)
• Socket set (8mm-22mm)
• Wrench set (10mm-19mm)
• Phillips screwdriver
• Flat-blade screwdriver
• Pry bar
• Honda/Acura crankshaft pulley holding tool (specialty)
• Harmonic balancer puller (specialty)
• Engine support bar (specialty)
• Drain pan (at least 2-gallon)
• Funnel
• Paint marker

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Timing belt - Qty: 1
• Timing belt tensioner (hydraulic) - Qty: 1
• Timing belt idler pulley - Qty: 1
• Timing belt tensioner pulley - Qty: 1
• Water pump - Qty: 1
• Water pump gasket/O-ring - Qty: 1
• Crankshaft pulley bolt (recommended) - Qty: 1
• Accessory drive belt (recommended) - Qty: 1
• Honda Type 2 coolant (premixed) - Qty: 2 gallons

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📋 Before You Begin

• Park on level ground, set the parking brake, and place wheel chocks behind the rear wheels.
• Disconnect the battery using a 10mm socket on the negative terminal.
• Raise the front-right corner with a floor jack and support with jack stands.
• Remove the front-right wheel using a 19mm socket.
• Set up the engine support bar (a bar that spans the fenders and holds the engine from above) before removing the right engine mount.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove splash shields and access covers

• Remove the right inner fender liner/splash shield fasteners using a trim clip removal tool and 10mm socket.
• Remove the lower splash shield (if needed) using a 10mm socket.

Step 2: Remove the accessory (serpentine) drive belt

• Rotate the belt tensioner with a 14mm socket and breaker bar to unload the belt.
• Slide the belt off and note the routing (take a quick photo).

Step 3: Support the engine and remove the right engine mount

• Apply light support with the engine support bar (specialty) so the engine doesn’t drop when the mount is removed.
• Remove the right engine mount and bracket bolts using a 14mm socket and 17mm socket.
• Set the mount/bracket aside in the order removed.

Step 4: Remove the crankshaft pulley (harmonic balancer)

• Install the Honda crankshaft pulley holding tool (specialty) to keep the pulley from turning (it locks the pulley so you can safely loosen the bolt).
• Loosen the crankshaft pulley bolt using a 19mm socket and 1/2" breaker bar.
• Remove the bolt, then remove the pulley. If it’s stuck, use a harmonic balancer puller (specialty) to pull it straight off.
• When reinstalling later: Torque crankshaft pulley bolt to 245 Nm (181 ft-lbs).

Step 5: Remove timing belt covers

• Remove the upper and lower timing covers using a 10mm socket.
• Keep bolts grouped by cover section so they go back in the same locations.

Step 6: Set cylinder #1 to Top Dead Center (TDC) on compression

• Rotate the crankshaft clockwise using a 19mm socket and ratchet on the crank bolt (temporarily reinstall the bolt finger-tight if needed for turning).
• Align the crank timing mark with the pointer and confirm both cam timing marks align with their references on the rear cover.
• Mark the belt-to-sprocket positions with a paint marker as an extra reference.
• Only rotate clockwise to protect timing.

Step 7: Release belt tension and remove the timing belt

• Remove the timing belt tensioner mounting bolts using a 12mm socket.
• Remove the tensioner and then slip the timing belt off the cam and crank sprockets.
• Do not rotate the camshafts/crankshaft with the belt removed.

Step 8: Replace idler pulleys and water pump (recommended while you’re here)

• Remove the idler/tensioner pulleys using the appropriate 14mm socket and ratchet.
• Place a drain pan under the engine.
• Remove the water pump bolts using a 10mm socket, then remove the water pump.
• Clean the sealing surface gently with a plastic scraper (use a flat-blade screwdriver carefully only if needed). Do not gouge aluminum.
• Install the new water pump with a new gasket/O-ring and tighten bolts evenly in a crisscross pattern using a 10mm socket.

Step 9: Install the new timing belt

• Confirm crank and both cam marks are still perfectly aligned.
• Install the new idler/tensioner pulleys and tighten using a torque wrench to the kit/manufacturer specs.
• Route the new belt in this general order (keep the belt tight on the non-tensioned side): crank sprocket → rear bank cam → front bank cam → down to tensioner area.
• Reinstall the hydraulic tensioner using a 12mm socket.

Step 10: Apply tension and verify timing marks

• If your new hydraulic tensioner includes a retaining pin, pull the pin straight out with pliers (or by hand) to apply tension.
• Rotate the crankshaft clockwise two full revolutions using a 19mm socket and ratchet.
• Re-check that the crank and cam timing marks realign exactly. If any mark is off, remove the belt and correct it.
• Perfect marks matter more than paint marks.

Step 11: Reassemble timing covers, pulley, mount, and belt

• Reinstall the timing covers using a 10mm socket.
• Reinstall the crank pulley and NEW crank bolt (recommended). Hold the pulley with the pulley holding tool (specialty) and tighten with a torque wrench: Torque to 245 Nm (181 ft-lbs).
• Reinstall the right engine mount/bracket using a 14mm socket and 17mm socket, then remove the engine support bar once the mount is fully secured.
• Reinstall the accessory belt using a 14mm socket on the tensioner.
• Reinstall splash shields and the wheel using a 10mm socket (shields) and 19mm socket (lug nuts).

Step 12: Refill coolant (if water pump was replaced)

• Refill with Honda Type 2 coolant using a funnel.
• Start the engine and set the heater to HOT; let it reach operating temperature and top off as the level drops.
• Check for leaks around the water pump area.

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✅ After Repair

• Start the engine and listen for abnormal noises (slapping, chirping, grinding). Shut off immediately if heard.
• Let the engine idle, then do a short test drive and recheck for coolant leaks (if applicable).
• Recheck coolant level the next day (cold engine) and top off if needed.
• If the battery was disconnected, reset the clock and power window auto function if required.

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💰 DIY vs Shop Cost

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

DIY Cost: $250-$550 (parts only)

You Save: $650-$1,750 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 5-8 hours.

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🎯 Ready to get started?

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