Piston Cooling Oil Jets
| ITEM | DESCRIPTION |
|---|---|
| 1 | Piston cooling oil jet (quantity 4) |
| 2 | Piston cooling oil jet solenoid |
The 4 piston cooling oil jets are located in the cylinder block. Each piston cooling oil jet is located adjacent to a cylinder and secured in the cylinder block with a bolt.
The piston cooling oil jets provide piston and gudgeon pin cooling and lubrication. Each piston cooling jet has a single outlet nozzle which sprays oil onto the piston undercrown. The jets are supplied pressurized engine oil from the variable flow oil pump with integral vacuum pump through a drilling in the cylinder block. The oil supply to the drilling is controlled by a piston cooling oil jets solenoid that is controlled by the PCM . The piston cooling oil jet solenoid can open and close the oil supply depending on engine speed and load.
In addition to supplying oil to the piston cooling bore the oil lubricates the small end bearing and the gudgeon pin.