Since it's a Renault you may want to consider keeping the lump and throwing away the car. Then it won't go wrong ever again.
Until the rubber deteriorates![]()
How far out was I, in my size approximation?It has groves part way down each side where it has been pushed in a cage/housing. The rubber is only a thin skin to protect the core from the elements. I'll call in at the garage that does our servicing to be sure.
Vibration damper off something?
Here is a harmonic balance weight from a discovery axle you see the wire to hold it if it drops of during offroading
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A tuned mass damper, also known as a harmonic absorber, is a device mounted in structures to reduce the amplitude of mechanical vibrations. Their application can prevent discomfort, damage, or outright structural failure. They are frequently used in power transmission, automobiles, and buildings.
Production cars
Tuned mass dampers are widely used in production cars, typically on the crankshaft pulley like a torsional damper to control torsional vibration and, more rarely, the bending modes of the crankshaft. They are also used on the driveline for gearwhine, and elsewhere for other noises or vibrations on the exhaust, body, suspension or anywhere else. Almost all modern cars will have one mass damper, some may have 10 or more.
The usual design of damper on the crankshaft consists of a thin band of rubber between the hub of the pully and the outer rim. This design is often called a harmonic damper. An alternative design is the centrifugal pendulum absorberwhich is used to reduce the internal combustion engine's torsional vibrations on a few modern cars.
All four wheels of the Citroen 2cv incorporated a tuned mass damper (referred to as a "Batteur" in the original French) of very similar design to that used in the Renault F1 car, from the start of production in 1949 on all four wheels, before being removed from the rear and eventually the front wheels in the mid 1970s.
Here is a harmonic balance weight from a discovery axle you see the wire to hold it if it drops of during offroading
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