Renault 90S Engine and Overhaul Kits. If you are not finding what you need for your Renault 90S Contact us here.. Engine Parts offered range from complete overhaul kits to rod bearings, main bearings, pistons, sleeves, liners, rings, head gaskets, gasket sets, valve train kits, intake and exhaust valves, fuel pumps and much more for your Renault.