🔧 CR-V - Spark Plug Replacement

Replacing the spark plugs restores strong ignition, smooth idle, and good fuel economy. On your CR-V, the plugs sit under the ignition coils on top of the engine, so access is straightforward with basic hand tools.

Difficulty Level: Beginner | Estimated Time: 0.8-1.5 hours

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⚠️ Safety & Precautions

• ⚠️ Work on a fully cool engine to avoid burns and to protect the aluminum cylinder head threads.
• ⚠️ Keep dirt out of the spark plug holes—debris can damage the engine.
• ⚠️ If you disconnect the battery, use a 10mm wrench and remove the negative terminal first.
• ⚠️ Do not over-tighten spark plugs—stripped threads are a big repair.

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🔧 Required Tools

You'll need the following tools for this repair:

• Safety glasses
• Nitrile gloves
• 10mm socket
• 3/8" ratchet
• 3/8" torque wrench (5-80 Nm range)
• 6" 3/8" extension
• 12" 3/8" extension
• 5/8" spark plug socket (rubber insert or магнит type)
• Small flathead screwdriver
• Compressed air blow gun
• Feeler gauge set
• Clean shop towels
• Flashlight

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• Spark plugs (iridium, correct fit for CR-V 2.4L) - Qty: 4
• Dielectric grease - Qty: 1
• Anti-seize compound - Qty: 1

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📋 Before You Begin

• Park on level ground, shift to P, and set the parking brake.
• Let the engine cool completely (at least 1 hour after driving).
• Open the hood and remove any loose items around the engine.
• Take a quick photo before unplugging connectors.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the engine cover (if equipped)

• Use a 10mm socket and 3/8" ratchet to remove the engine cover fasteners.
• Lift the cover off and set it aside on a clean towel.

Step 2: Unplug the ignition coils

• Each spark plug has an ignition coil on top (a “coil” is the part that makes high voltage for the plug).
• Use a small flathead screwdriver to gently lift the connector lock tab (if needed), then unplug the coil connector by hand.
• Repeat for all 4 coils.

Step 3: Remove the ignition coils

• Use a 10mm socket and 3/8" ratchet to remove the 10mm bolt holding each coil.
• Pull each coil straight upward to remove it.
• Set coils in order (1-4) so they go back to the same cylinder.

Step 4: Clean around the spark plug wells

• Use a flashlight to look down each spark plug tube.
• Use compressed air blow gun to blow dirt out of each tube before removing the plug.
• Wipe the area with clean shop towels.

Step 5: Remove the old spark plugs

• Install a 5/8" spark plug socket on a 12" 3/8" extension and 3/8" ratchet.
• Lower it straight down onto the plug and loosen it counterclockwise.
• Once loose, keep turning until it comes out, then lift it out with the socket.
• If it feels stuck, stop and work it gently.

Step 6: Check the new spark plug gap (quick verification)

• Use a feeler gauge set to verify the gap matches spec.
• For your CR-V, typical gap is about 1.0–1.1 mm (0.039–0.043 in) depending on plug brand; the plugs are usually pre-gapped correctly.
• Do not pry on an iridium center electrode—if the gap is way off, exchange the plug instead.

Step 7: Install the new spark plugs (by hand first)

• Put a tiny smear of anti-seize compound on the plug threads only (avoid the tip and electrode).
• Place the new plug into the 5/8" spark plug socket and carefully lower it into the hole.
• Thread it in by hand using the extension only (no ratchet yet) to avoid cross-threading.
• Once seated, use the 3/8" torque wrench to tighten: Torque to 18 Nm (13 ft-lbs).

Step 8: Reinstall ignition coils

• Apply a small dab of dielectric grease inside each coil boot (the rubber “boot” is the sleeve that seals onto the plug).
• Push the coil straight down until it fully seats on the spark plug.
• Install the coil hold-down bolt using a 10mm socket, then tighten with a 3/8" torque wrench: Torque to 12 Nm (9 ft-lbs).

Step 9: Plug the coil connectors back in

• Reconnect each coil electrical connector by hand until it clicks.
• Gently tug each connector to confirm it’s locked.

Step 10: Reinstall the engine cover

• Set the cover back in place.
• Use a 10mm socket and 3/8" ratchet to reinstall the fasteners snugly (do not over-tighten plastic parts).

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✅ After Repair

• Start the engine and let it idle for 1–2 minutes.
• Listen for a smooth idle (no shaking) and confirm the check engine light stays off.
• Take a short test drive, then recheck that everything is secure under the hood.
• If it misfires, re-check coil connectors first.

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💰 DIY vs Shop Cost

Shop Cost: $220-$420 (parts + labor)

DIY Cost: $45-$120 (parts only)

You Save: $175-$300 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.8-1.3 hours.

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🎯 Ready to get started?

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