For information to all regarding the tensioner shock absorber for the 24v 164 cloverleaf engine, an alternative part that can be used successfully according to my trusted friends on the 164 register in the Netherlands.itis from a BMW 2.5 TDS engine.
The stroke is a little longer but it works in the application well from their experience.
It is readily available unlike the Fiat / Alfa part and cost much less, from £26 on eBay etc used on BMW, GM, Landrover Rangerover engines
Will fit soon