Piston Oil Cooler Jet
The Piston Oil Cooler Jet (1) is used to aid in the cooling of the pistons and the cylinder walls. There are three Piston Oil Cooler Jets used. Each jet is supplied oil by the main oil gallery. The oil is sprayed upwards onto the bottom of the pistons and sides of the cylinder walls. A Piston Oil Cooler Jet is mounted to the engine block under each pair of opposing cylinders.
Each jet has a check valve that closes below 241 kPa (35 psi) to maintain ample oil pressure at idle. All three oil jets are identical and seal to the engine block using an O-ring and fastener.