A piston cooling system includes: a nozzle pipe portion which communicates with an oil passage which is provided in an internal combustion engine and which extends towards an interior of a cylinder bore; and a flow path forming member which is fixed to a d...

A simple method for fitting an oil spray jet into a crankshaft housing in order to cool the underside of a piston has the shaped jet (10) secured into a bore (4) leading to an oil duct (22) for a main bearing. The spray jet end is secured by a clip (12) wi...