Abstract: The conventional screw coupling between cylinder head and liner is reinforced externally by the addition of a number of bolts arranged around the circumference of the head and extending parallel with the longitudinal axis of the head through a distance whereby at least the threads of the screw coupling are entirely compassed; each bolt is accommodated by a relative socket incorporated into the head casting, secured with a relative nut and torqued in such a way as to tension the section of the head surrounding the coupling.

Abstract: The device comprises a control rod running parallel to the fuel injection pump and affording a rigidly associated collar alongside each pumping element; each such collar is sandwiched between a pair of spring-loaded sleeves slidably mounted to the rod and incorporating a relative pair of peripheral tongues by which the internal metering mechanism of the element is rotated between two limit positions corresponding to the maximum and minimum delivery settings of the pump; the calibrated force of the springs is balanced against the resistance offered by the metering mechanism in such a way as to enable continued operation of the rod even in the event that at least one mechanism should jam at a given point between its two limit positions.