🔧 Spark Plugs - Replacement

Your V6 uses six spark plugs, and the rear bank is tucked under the upper intake area. This job is very doable at home, but take your time so you do not crack a coil, drop debris into the engine, or cross-thread a plug.

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

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⚠️ Safety & Precautions

• Work on a cold engine. Hot aluminum threads can be damaged easily.
• Disconnect the negative battery cable before removing coils or intake parts.
• Keep dirt out of the spark plug tubes. Use compressed air before removing plugs.
• Do not use an impact tool on spark plugs.
• If the intake manifold is removed, cover open ports right away.

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🔧 Required Tools

You'll need the following tools for this repair:

• 10mm socket
• 12mm socket
• 14mm spark plug socket
• 3/8-inch ratchet
• 3/8-inch torque wrench
• 3-inch extension
• 6-inch extension
• Universal joint socket adapter
• Flat blade screwdriver
• Trim clip removal tool
• Needle-nose pliers
• Compressed air nozzle
• Anti-seize compound
• Dielectric grease
• Gloves
• Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Spark plug set - Qty: 6
• Intake manifold gasket set - Qty: 1
• Throttle body gasket - Qty: 1
• Air cleaner assembly gasket or duct seals - Qty: 1
• Dielectric grease - Qty: 1

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📋 Before You Begin

• Park on level ground and set the parking brake.
• Let the engine cool completely.
• Disconnect the negative battery cable with a 10mm socket.
• Remove the engine cover and air intake ducting before starting.
• Label connectors as you unplug them.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Disconnect power and remove access covers

• Use a 10mm socket to disconnect the negative battery cable.
• Remove the plastic engine cover by pulling it straight up.
• Use a flat blade screwdriver or trim clip removal tool to loosen the air intake duct clamps and remove the ducting.

Step 2: Remove the upper intake components

• Use a 10mm socket and 12mm socket to remove the upper intake manifold fasteners.
• Disconnect any vacuum hoses and electrical connectors attached to the intake assembly.
• Lift the intake assembly out carefully.
• Stuff clean rags in open ports.

Step 3: Remove ignition coils

• Unplug each ignition coil connector.
• Use a 10mm socket to remove the coil hold-down bolts.
• Pull each coil straight up and out.
• Inspect the coil boots for oil, cracks, or carbon tracking.

Step 4: Remove the old spark plugs

• Use compressed air to blow dirt away from each spark plug tube.
• Use a 14mm spark plug socket, ratchet, and extensions to remove each plug.
• Turn each plug out slowly to avoid thread damage.
• If a plug feels tight, work it back and forth gently.

Step 5: Install the new spark plugs

• Check each new plug gap if needed.
• Thread each plug in by hand first using the spark plug socket and extension.
• Once seated, tighten with a torque wrench to 18 Nm (13 ft-lbs).
• Apply a small amount of anti-seize only if your plug manufacturer specifically allows it.

Step 6: Reinstall ignition coils

• Add a small amount of dielectric grease inside each coil boot.
• Push each coil fully onto the new plug.
• Install the coil bolts with a 10mm socket.
• Torque to 8 Nm (71 in-lbs).
• Reconnect each electrical connector.

Step 7: Reinstall the intake system

• Install new intake manifold gaskets and throttle body gasket if removed.
• Reinstall the intake assembly using a 10mm socket and 12mm socket.
• Torque intake fasteners to 21 Nm (15 ft-lbs).
• Reconnect all hoses and connectors.
• Reinstall the intake ducting and engine cover.

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✅ After Repair

• Reconnect the negative battery cable with a 10mm socket.
• Start the engine and listen for smooth idle.
• Check for any vacuum leaks, warning lights, or loose connectors.
• Drive gently for the first few minutes to confirm normal operation.

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💰 DIY vs Shop Cost

Shop Cost: $350-$700 (parts + labor)

DIY Cost: $60-$180 (parts only)

You Save: $290-$520 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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