 In December 1982, the Renault Board proposed a new diesel engine with for the Renault 9.Known as "F8M", the new engine was designed by engineer George Douin and his team and broke with tradition by featuring no removable cylinder liners, thanks to advances in metals technology that significantly slow the wear of rubbing mechanical parts.The new 4- cylinder unit adopted an overhead camshaft driven by a toothed belt that also controls the diesel injection pump.