Lubrication System Flow Diagram
| Item | Description |
|---|---|
| 1 | Turbocharger |
| 2 | Exhaust hydraulic valve tappet (quantity 12) |
| 3 | Exhaust camshaft |
| 4 | Variable Camshaft Timing (VCT) actuator - Exhaust |
| 5 | Rear Continuous Variable Valve Lift (CVVL) assembly |
| 6 | Front CVVL assembly |
| 7 | VCT actuator - Intake |
| 8 | Intake camshaft |
| 9 | Secondary timing chain tensioner |
| 10 | Secondary timing chain oil jet |
| 11 | Primary timing chain oil jet |
| 12 | Primary timing chain tensioner |
| 13 | Piston cooling oil jet (quantity 6) |
| 14 | Piston cooling oil jet solenoid |
| 15 | Crankshaft |
| 16 | Oil filter element and cap |
| 17 | Oil cooler |
| 18 | Oil gallery pressure feedback to the variable flow oil pump with integral vacuum pump |
| 19 | Variable flow oil pump with integral vacuum pump |
| 20 | Oil return pipe from the turbocharger to the oil pan |
| 21 | Oil pan |
The engine oil is drawn from the oil pan and pressurized by the variable flow oil pump with integral vacuum pump. The output from the variable flow oil pump with integral vacuum pump is then filtered through the oil cooler and the oil filter. The engine oil is then distributed through the oil bores.
The output from the oil filter is distributed through oil bores in the cylinder heads and the cylinder block. All moving parts are lubricated by pressured or splashed oil.
Pressurized oil is also provided for:
- The Variable Camshaft Timing (VCT) system
- The piston cooling oil jets
- The timing chain oil jets
- The turbocharger
- The hydraulic valve tappets
- The Continuous Variable Valve Lift (CVVL) assemblies
- The timing chain tensioner.
The engine oil pressure is fed back to the variable flow oil pump via a drilling in the cylinder block. The variable flow oil pump uses this pressure signal to regulate the oil flow and pressure. The Powertrain Control module (PCM) can control the variable flow oil pump electrically, requesting a pressure held in the engine oil pressure map. The engine oil pressure map is dependent on engine speed and load.
The oil returns to the oil pan under gravity. Large drain holes through the cylinder head and the cylinder block allow the oil to quickly return to the oil pan. System replenishment is through the oil filler cap on the camshaft cover. An oil pan drain plug is installed at the front of the oil pan.