This replacement spark plug insulator extension is custom-engineered for the Renault Clio 2 1.2 16V (D4F engine). The factory plastic extensions are known to become brittle, crack, and fail due to intense engine bay heat, causing electrical arcing and engine misfires. This part has been precisely reverse-engineered to maintain strict dielectric isolation and ensure a secure, sealed fit over the spark plug terminal and ignition lead.

Print Recommendations:Material: PA-CF (Carbon Fiber Nylon) or high-temp ASA is strictly required (Since this part sits directly inside the engine block cylinder head wells and is exposed to continuous radiant temperatures exceeding 120°C, standard PLA, PETG, or basic ABS will melt. High thermal resistance and excellent dielectric properties make engineering filaments mandatory)Layer height: 0.16mm to 0.12mm optional (Crucial for achieving precise airtight seal tolerances against the spark plug boot)Infill: 100% (Solid infill is mandatory to maximize electrical insulation strength, eliminate internal air gaps, and withstand high engine bay vibrations)Supports: may vary depending on the model orientation and print bed direction. Please consider your slicer's recommendations

Copyright and usage note: This model is intended for personal use and spare part replacement only. Commercial production requires licensing.