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Autopapyrus · Hyundai Solaris (Accent) 1.6 G4FC (2013)
https://autopapyrus.com/guides/hyundai/solaris/spark-plug-replacement/
Compiled automatically from service literature and owner experience. Specs are for the typical configuration — check them against your exact car before you start.

Hyundai Solaris (Accent) 1.6 G4FC (2013): Spark Plug Replacement

On the 1.6 G4FC (Gamma, 16-valve, 109 hp), spark plugs should be replaced every 20,000 km or once a year. The procedure is simple and does not require removing the cylinder head. The plugs are accessible from the top, under a plastic cover.

Difficulty: Easy Time: 20-30 minutes Steps: 14 Tools: 21 mm spark plug socket, extension, ratchet or 10 mm universal wrench, flat-head screwdriver (for removing the cover)

Part

  • 🔩 NGK BKR6E or Hyundai OE 18841-10040. Alternatives: Bosch FR7DPP, Champion RC8MC

Step by step

14 steps
  1. Open the hood and disconnect the negative (minus) terminal on the battery (for safety).
  2. Let the engine cool down (ideally wait 15-20 minutes after running it).
  3. Find the black plastic cover on the right side of the cylinder head (above the valve cover).
  4. Remove the 2-3 screws with a flat-head screwdriver or a 10 mm ratchet, then take off the cover.
  5. You will see 4 black ignition coils seated in the wells in the cylinder head.
  6. One at a time (so you don't mix up the order): — Carefully rock the ignition coil up and down to pull it out of its well. — Take the 21 mm spark plug socket on an extension and fit it onto the plug. — Slowly unscrew the plug counterclockwise, without rushing (the plug sits deep in the well). — Pull out the old plug.
  7. Check the gap on the new plug (usually 0.8-1.0 mm — modern plugs come pre-gapped). If adjustment is needed, use a feeler gauge or bend the electrode.
  8. Before installing, apply a thin layer of graphite grease (for example, Liqui Moly High Performance or similar) to the threads of the new plug. This will make removal easier at the next replacement.
  9. Thread the new plug into the well by hand (carefully, avoiding cross-threading), then tighten it with the spark plug socket to a torque of 20-25 N·m (15-18 lb-ft). Do not overtighten, as you can strip the threads or break the plug.
  10. Install the ignition coil back into its well (it should seat with a light click).
  11. Repeat for the remaining three plugs (firing order: 1-3-4-2, numbered clockwise when viewed from the front).
  12. Reinstall the plastic cover and tighten the screws.
  13. Reconnect the battery terminal.
  14. Start the engine. It should start without hesitation, with a cold idle of 800-1000 rpm.

Common mistakes and warnings

  • — Do not use "cold" spark plugs (R or N type with a long heat cone) for daily driving. They are for motorsport under high loads only. For the Solaris, use the standard NGK BKR6E. — If a knocking noise or a Check Engine light appears after replacing the plugs, the plug type or gap is probably wrong. Check the installation. — Do not mix up the coil connections. Each coil corresponds to its own cylinder (usually marked on the cover).