Flywheel Fixing Bolt - Renault Clio 16S / Williams / 2 3 RS

The catastrophic danger of engine failure when reusing a stretched or fatigued original factory flywheel bolt

The high-revving sports engines developed for the Renault Sport range subject the crankshaft assembly to extreme torsional vibrations and brutal deceleration loads. By making the decision to reuse your old original flywheel bolts during a clutch replacement, or by using non-rated standard hardware, you accept the drawback of severely weakling your engine's rotational core. These fasteners are stretch-critical hardware designed to yield plastically upon initial factory torque-to-angle settings to hold optimal tension. Without a systematic replacement using this brand new flywheel bolt for Clio 16S / Williams / Clio 2 RS / Clio 3 RS, fatigued steel loses its mechanical pre-load capacity. Under the stress of track-day flat shifting and high-RPM loads, an old bolt will stretch further, develop microscopic play, and eventually shear off completely. A single bolt failure instantly unleashes the flywheel assembly, resulting in the absolute destruction of your gearbox casing, your clutch pressure plate, and often snaps the crankshaft snout. You permanently lose the engine block of your performance car, face catastrophic structural damage, and encounter astronomical repair bills.

A stretched flywheel bolt can no longer maintain the crucial clamping pressure or fluid seal required by the factory workshop manual. Reusing old hardware during transmission work exposes your engine bay to oil leaks through the crankshaft rear main seal and harmonics that destroy bearings.

Premium metallurgical grade engineered for professional motorsport constraints

This uprated crankshaft-to-flywheel structural bolt is forged from an ultra-high-grade steel alloy, guaranteeing a yield point far superior to standard hardware properties. Featuring precision rolled threads and specialized heat treatment, it provides perfectly uniform clamping force distribution across the flywheel mounting face. This is the mandatory technical specification demanded by engine builders during routine engine maintenance or to validate a professional customization project involving an uprated single-mass chromoly lightweight flywheel package on a sports chassis.

Comprehensive Renault Sport and 16-Valve engine compatibility guide

Engineered to lock perfectly into the 7 or 8-bolt crankshaft configurations of the iconic F7P, F7R, and F4R engine blocks, this bolt fits the following variants exactly:

• Renault Clio 1 16S / 16V (Naturally aspirated 1.8-litre 16V F7P engine - 137 bhp / 140 bhp - Model years 1991 to 1996)
• Renault Clio Williams (Naturally aspirated 2.0-litre 16V F7R engine - 150 bhp - Model years 1993 to 1996)
• Renault Clio 2 RS Phase 1, Phase 2 & Phase 3 (Naturally aspirated 2.0-litre 16V F4R engine - 172 bhp and 182 bhp models - Model years 2000 to 2005)
• Renault Clio 3 RS Phase 1 & Phase 2 (Naturally aspirated 2.0-litre 16V F4R engine - 197 bhp and 200 bhp / Cup models - Model years 2006 to 2012)

Rely on the strict mechanical precision and technical expertise of Optimiz Access

Since 2010, Optimiz Access has stood as a premier authority for high-grade performance components and dedicated performance vehicle maintenance across top European marques (such as Renault Sport, Audi, Volkswagen, Porsche, Mercedes, and BMW). Within our modern mechanical workshop situated in Northern France—closely serving regional automotive hubs like Lille, Valenciennes, Cambrai, Arras, Seclin, Douai, and Saint-Quentin—our expert technicians execute powertrain assembly using calibrated torque wrenches and angle gauges according to strict factory specifications. Backed by highly optimized global freight partnerships, we guarantee fast shipping worldwide to deliver your items quickly, ensuring your engine rebuild projects never face workshop delays.

Frequently Asked Questions (FAQ)

Why is it strictly mandatory to replace flywheel bolts every single time they are removed?
Flywheel fasteners undergo calculated plastic deformation (stretching) within their elastic limit during initial installation to lock down under high vibrational loads. If you attempt to reuse the same bolt, the steel has lost its structural resilience; it cannot hold true torque values, risking sudden snapping or backing out under high-RPM loads.

Is it necessary to apply a thread sealant or thread-locking compound on these bolts?
Yes. On these specific Renault engine configurations, the crankshaft mounting holes are drilled straight through into the oil oil pan. It is absolutely essential to clean the threads and apply a high-strength thread-locking compound (such as Loctite) to seal against oil migrating into the clutch housing and slipping the friction plate.

Secure your engine core and guarantee total transmission reliability

The power output and mechanical reliability of a track-driven vehicle rely heavily on the quality of its highest-stressed fasteners. Never compromise your rebuild with stretched bolts or generic hardware when reinstalling your clutch mechanism. Trust the strict quality standards of Optimiz Access to safeguard your engine, and secure your Flywheel Fixing Bolts for the Clio 16S, Williams, Clio 2 RS, and Clio 3 RS today.

Note: Heavy-duty paddle clutch kits, OEM hydraulic release bearings, crankshaft rear main oil seals, and lightweight chromoly steel flywheels are available for purchase at the bottom of this product page.