The 2016 Honda CR-V uses a 5/8-inch (16 mm) spark plug socket for its spark plugs. This is the correct hex size for the engine’s plugs and helps prevent damage during replacement.
The 2016 CR-V runs a four-cylinder engine with coil-on-plug ignition, so each cylinder has its own ignition coil that must be removed to access the spark plug. Having the right socket, plus a little extra reach and a torque wrench, makes the replacement safer and more reliable. Always consult the owner's manual or a service manual for exact specifications if you’re unsure.
Socket size and related tools
To perform a spark plug replacement on the 2016 CR-V, assemble the essential tools and verify the socket size before you begin.
- 5/8-inch (16 mm) spark plug socket with a rubber insert
- 3/8-inch drive ratchet
- Extension bar (6–12 inches) to reach deeper plugs
- Flexible or universal joint adapter to access angled plugs
- Torque wrench capable of measuring low torque (roughly 13 ft-lbs / ~18 N·m)
Having the correct socket and access tooling helps prevent cross-threading, dropped plugs, and other common installation mistakes.
Quick procedural overview for plug replacement
The following steps outline a typical spark plug replacement workflow for a 2016 CR-V with a coil-on-plug setup. Always follow the exact procedure in your vehicle’s service manual.
- Ensure the engine is cool and disconnect the negative battery terminal for safety.
- Relieve any residual pressure and locate the spark plugs on the cylinder head (each has its own ignition coil).
- Carefully disconnect each ignition coil/boot and remove the coil mounting bolt if applicable.
- Use the 5/8-inch spark plug socket to loosen and remove the old plug. Keep the plug straight to avoid thread damage.
- Check the gap on the new spark plug (if not pre-gapped) to the manufacturer’s specification, then install the plug by hand to avoid cross-threading.
- Tighten to the recommended torque (typically around 13 ft-lbs / 18 N·m) and reinstall the ignition coil.
- Reconnect the negative battery terminal and clear any codes if necessary; start the engine to verify proper operation.
Following the outlined steps and using the correct socket size reduces the risk of damage and ensures the plugs seat correctly for optimal engine performance.
Notes and cautions
Always verify the exact torque specification and plug gap from the official service manual or Honda customer service, as specs can vary slightly by model year or plug type. If you’re unsure about performing maintenance yourself, consider having a qualified technician handle the replacement.
Summary
For a 2016 Honda CR-V, use a 5/8-inch (16 mm) spark plug socket. Pair it with appropriate extensions, a torque wrench, and care when removing/retaining ignition coils. Proper torque and correct plug gap—verified against the service manual—help ensure reliable ignition performance and prevent damage during installation.