General description This timing tool set is designed for use with diesel engines manufactured after 1997, where the threaded location holes have been removed. It is also suitable for 1.7 engines built between 1986 and 2000, and is equivalent to OEM KM 661-2, KM 851, and KM 951. This kit is compatible with Astra-F/G, Cavalier, and Vectra-A models featuring 17DR, X17DT, and DTL engines. It is specifically intended for belt-driven engines and is proudly made in Sheffield.