16mm Core Plug for Renault Clio 2 3 RS & Megane 2 3 RS

Why is replacing your F4R core plugs critical?

Ignoring the condition of your core plugs (also known as freeze plugs) means exposing your engine to sudden failure. On performance engines like the Clio 2 RS or Megane 3 RS, temperature and pressure spikes put immense strain on the cooling system. A corroded or dislodged plug leads to immediate coolant loss, risking fatal overheating, head gasket failure, or the complete destruction of your F4R engine.

Full Compatibility: Renault Sport & Racing Range

This 16mm plug is specifically designed to fit perfectly into the strategic locations of the block:

• Timing side: A critical point often difficult to access once the engine is installed.
• Left of the oil filter: An area highly exposed to frequent thermal cycles.

It fits the most demanding vehicles: Renault Clio 2 RS (Phase 1, 2, 3, and Jean Ragnotti), Clio 3 RS, and competition versions such as the Clio 2 X65 Cup, Clio 3 X85 Cup, Clio R3, and Group N builds. Owners of the Megane 2 RS and Megane 3 RS will also find the exact part needed to secure their engine block.

Optimiz Access Expertise for Your Engine

Since 2010, Optimiz Access has supported sports and premium vehicle enthusiasts worldwide. We know that every detail matters in motorsport. Don't let a small part ruin your racing season or engine build. Our core plugs are selected for their corrosion resistance and strict dimensional tolerances, ensuring a secure interference fit.

Professional Workshop Advice

Our technicians recommend systematically replacing these expansion plugs during any engine rebuild or timing belt service. Based in France, we export our high-quality parts worldwide to ensure your racing project gets the best components, wherever you are located.

Note: You can find complementary products, including our other core plug diameters, at the bottom of this product page.