Lister TS3 air cooled Diesel, 3 cylinder, 1900cc 1983 - on No oil seals but includes valve stem seals. Equates to 657-29531 Weight of set and packing approximately 1000g Pack size 310 x 430 x 40 The manufacturer recommends that the TS3 engine is overhauled after 6000 hours, including the replacement of all joints and seals. This proceedure will require a full gasket set.