Injectors sealing structure and method of sealing a cooling channel to an injection nozzle

An injector seal structure and a method for sealing a cooling passage to an injection nozzle are provided. The sealing assembly comprises a sealing sleeve which is sized and dimensioned to be slidably mounted in an injection nozzle receiving bore, and a retainer ring sized and dimensioned to be inserted axially into the sleeve. The ring contacts the sleeve and exerts a radial force is sufficient to create an interference fit and to move an interface area of ​​the sleeve radially outwardly to a sealing abutment against a wall, which forms the injector mounting bore, or pressing, to provide a secure to produce and reliable annular fluid seal.