Tucson heater plug change HYUNDAI Tucson (TL, TLE) (05.2015 - 05.2023)

Quick Glow Plug Replacement (Hyundai Tucson TL/TLE, Diesel)

Replacing glow plugs on a Hyundai Tucson diesel engine (TL/TLE) requires care, as they are located deep in the cylinder head and are prone to seizing.

1. Access: Remove the plastic engine cover. You may need to remove some air ducts or the EGR valve (depending on the specific 1.7L CRDI or 2.0L CRDI engine).
2. Disconnect: Disconnect the wiring from each glow plug (these may be 8 mm or 10 mm nuts, or plastic caps/connectors).
3. Removal:
* Use the appropriate size spark plug wrench (usually 10 mm or 12 mm).
* Try removing the spark plugs with the engine warm (but not hot!), as this can loosen the threads.
* Important: Remove the spark plugs very smoothly and slowly. If the spark plug is tight, do not apply excessive force to avoid breaking it in the head. Use a penetrating lubricant (like WD-40) and alternately tighten and loosen.
4. Installation:
* Apply a special ceramic/high-temperature lubricant to the threads of the new spark plugs to prevent future seizing.
* Screw in the new spark plugs by hand, then tighten them with a torque wrench to the manufacturer's specified torque (usually 15 to 20 N m). Overtightening or undertightening will cause breakage or leaks.
5. Assembly: Connect the wiring and install the decorative cover.

Important: Do not use excessive force when removing old spark plugs to avoid costly repairs if they break.