🔧 CR-V - Spark Plug Replacement

You’ll be replacing the four spark plugs on your CR-V to keep the engine running smoothly and prevent misfires, hard starting, or poor fuel economy. On this engine, each spark plug sits under its own ignition coil on top of the engine.

Difficulty Level: Beginner | Estimated Time: 1-1.5 hours

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⚠️ Safety & Precautions

• ⚠️ Work on a completely cold engine; hot parts can burn you and hot aluminum threads can be damaged more easily.
• ⚠️ Turn the ignition fully OFF and remove the key/keep the smart key at least 3 m away from the vehicle.
• ⚠️ Disconnect the negative battery terminal to avoid accidental cranking and reduce the chance of short circuits.
• ⚠️ Do not drop anything into the spark plug holes; it can cause serious engine damage.
• ⚠️ Use a torque wrench so you do not over-tighten the plugs and strip the aluminum cylinder head.
• ⚠️ Never use power tools to install spark plugs; always start threading by hand.

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🔧 Required Tools

You'll need the following tools for this repair:

• 🛠️ 10mm socket
• 🛠️ 3/8" drive ratchet
• 🛠️ 3/8" drive torque wrench (5-60 Nm range)
• 🛠️ 14mm spark plug socket (thin-wall, with rubber insert)
• 🛠️ 3/8" drive extension (6")
• 🛠️ Flathead screwdriver (medium)
• 🛠️ Needle-nose pliers
• 🛠️ Magnetic pickup tool
• 🛠️ Small inspection mirror
• 🛠️ Plastic trim tool
• 🛠️ Can of compressed air
• 🛠️ Shop rag
• 🛠️ Mechanic gloves
• 🛠️ Safety glasses

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🔩 Required Parts

HowToo sells all the parts you need for this repair:

• 🔩 Iridium spark plugs (OEM spec for 1.5L turbo) - Qty: 4
• 🔩 Dielectric grease (for ignition coil boots) - Qty: 1 small tube
• 🔩 Battery terminal protector spray - Qty: 1 (optional)
• 🔩 Shop towels - Qty: 1 pack

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📋 Before You Begin

• Park the CR-V on level ground, shift to P, and set the parking brake.
• Let the engine cool completely (at least 45–60 minutes after driving).
• Open the hood and support it with the hood prop rod.
• Disconnect the negative battery cable using the 10mm socket and move it aside so it cannot spring back.
• Keep the new spark plugs in their boxes until you are ready to install them to avoid damage or contamination.

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🔨 Step-by-Step Instructions

Follow these steps in order:

Step 1: Remove the engine cover

• With the hood open, locate the plastic engine cover on top of the engine.
• Use your hands to pull up firmly at the corners; it is held by rubber grommets, not bolts.
• Lift the cover off and set it aside in a clean area.
• Pull straight up to avoid cracking the cover.

Step 2: Locate ignition coils and clean the area

• The four ignition coils are the black rectangular pieces on top of the engine, each with an electrical connector.
• Use the can of compressed air to blow dust and debris away from the coil area and around the visible spark plug wells.
• Keeping dirt out prevents it falling into the cylinders.

Step 3: Disconnect the ignition coil connectors

• Pick one coil to start; you’ll work one cylinder at a time so you don’t mix anything up.
• On the chosen coil, press the small plastic locking tab on the connector using your thumb or a flathead screwdriver gently.
• While holding the tab, pull the connector straight back to unplug it.
• Do not pull on the wires; pull on the connector body.

Step 4: Remove the ignition coil

• Use the 10mm socket and 3/8" ratchet to remove the single bolt holding that coil to the valve cover.
• Place the bolt in a small container so it does not get lost.
• Grip the coil and gently twist it left and right while pulling upward to remove it from the spark plug well.
• Set the coil aside in order (for example, front of engine to back) so you can return each one to its original cylinder.

Step 5: Blow out the spark plug well

• Before removing the spark plug, use the can of compressed air to blow out the spark plug tube to remove any dirt.
• Hold a shop rag loosely over the area to catch any debris.
• This step helps protect the cylinder threads.

Step 6: Remove the old spark plug

• Attach the 14mm spark plug socket to the 6" extension and 3/8" ratchet.
• Carefully lower the socket straight down into the spark plug well until it seats fully on the plug.
• Turn the ratchet counterclockwise to break the plug loose, then continue turning until the plug is completely unscrewed.
• Lift the extension and socket straight up; the rubber insert in the socket should bring the plug out with it.
• If the plug sticks in the well, use the magnetic pickup tool to carefully remove it.

Step 7: Check and prepare the new spark plug

• Take the new plug out of its box and compare it to the old one to confirm size and style match.
• These iridium plugs come pre-gapped; do not bend the center or side electrode.
• Do not apply anti-seize to the threads; Honda’s plugs are coated and anti-seize can cause over-tightening.
• If you use a tiny bit of dielectric grease, only apply a small amount inside the rubber coil boot, not on the plug threads or electrodes.

Step 8: Install the new spark plug

• Place the new plug into the 14mm spark plug socket with the rubber insert gripping the metal hex so it does not fall out.
• Lower the plug and socket straight into the spark plug well by hand.
• Using only the extension (no ratchet yet), slowly turn the plug clockwise by hand to start the threads.
• Make sure it turns easily for several turns; if you feel resistance right away, stop, back it out, and start again to avoid cross-threading.
• Once finger-tight, attach the 3/8" torque wrench to the extension and tighten the plug to 18 Nm (13 ft-lbs).
• Use smooth motion, stop when torque wrench clicks.

Step 9: Reinstall the ignition coil

• If using dielectric grease, put a very small dab inside the end of the coil boot where it will contact the ceramic part of the spark plug.
• Align the coil with the spark plug well and push it straight down until it seats fully on the plug.
• Reinstall the coil bolt using the 10mm socket and ratchet, then snug it down.
• Tighten the coil bolt to about 9 Nm (80 in-lbs) with the torque wrench if possible; do not overtighten, it’s a small bolt.
• Reconnect the ignition coil electrical connector by pushing it straight on until you hear or feel a click.

Step 10: Repeat for the remaining cylinders

• Repeat Steps 3–9 for each of the remaining three coils and spark plugs, one at a time.
• Always fully finish one cylinder before moving to the next to avoid mixing coils or connectors.
• Work slowly and neatly to avoid mistakes.

Step 11: Reinstall the engine cover

• Double-check that all four ignition coil connectors are plugged in and all 10mm bolts are installed and snug.
• Position the engine cover over the engine so the rubber grommets line up with their mounting pegs.
• Press down firmly at each corner until the cover snaps into place.

Step 12: Reconnect the battery

• Reattach the negative battery cable to the battery terminal using the 10mm socket.
• Tighten the terminal until it is secure and does not move by hand, but do not overtighten.
• Optionally spray a light coat of battery terminal protector spray on the connection.

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✅ After Repair

• Start the engine and let it idle for a few minutes. It should start quickly and idle smoothly without misfires or shaking.
• Watch the instrument cluster for any warning lights (especially the check engine light). If any appear, turn the engine off and recheck all coil connectors.
• Take a short, gentle test drive. Pay attention to acceleration and engine smoothness.
• After the test drive, shut the engine off, open the hood, and visually inspect the coil area for anything loose or out of place.

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💰 DIY vs Shop Cost

Shop Cost: $220-$350 (parts + labor)

DIY Cost: $60-$120 (parts only)

You Save: $160-$230 by doing it yourself!

Shop labor rates vary but typically run $100-$150/hour. This repair takes a shop approximately 0.8-1.0 hours.

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