System Operation
Engine Oil Flow Illustration
| Item | Part Number | Description |
|---|---|---|
| 1 | 6622 6622 | Oil pump screen and pickup tube |
| 2 | 6600 6600 | Oil pump |
| 3 | 6K677 6K677 | Turbocharger oil return tube |
| 4 | 6N652 6N652 | Turbocharger oil return tube gasket (2 required) |
| 5 | 6K254 6K254 | Timing chain tensioner |
| 6 | 6L663 6L663 | Turbocharger oil filter |
| 7 | 6010 6010 | Cylinder block |
| 8 | 6K679 6K679 | Turbocharger oil supply tube |
| 9 | 6K682 6K682 | Turbocharger |
| 10 | 6C524 6C524 | Intake VCT phaser and sprocket |
| 11 | 6C525 6C525 | Exhaust VCT phaser and sprocket |
| 12 | 6A272 6A272 | Exhaust camshaft |
| 13 | - | Camshaft front bearing cap (part of 6049) |
| 14 | 6B297 6B297 | VCT oil control solenoid |
| 15 | 6B297 6B297 | VCT oil control solenoid |
| 16 | - | Camshaft rear bearing cap (part of 6049) |
| 17 | 9B374 9B374 | Fuel pump housing |
| 18 | 6A271 6A271 | Intake camshaft |
| 19 | 2A451 2A451 | Vacuum pump |
| 20 | 6049 6049 | Cylinder head |
| 21 | 6051 6051 | Head gasket |
| 22 | 6A785 6A785 | Crankcase vent oil separator |
| 23 | 6A636 6A636 | Oil filter adapter gasket |
| 24 | 6881 6881 | Oil filter adapter |
| 25 | 9278 9278 | EOP sensor |
| 26 | 6714 6714 | Oil filter |
| 27 | 6300 6300 | Crankshaft assembly |
| 28 | 6K360 6K360 | Balance shaft assembly |
| 29 | 6675 6675 | Oil pan |
Lubrication System
The engine lubrication system is of the force-feed type in which oil is supplied under full pressure to the crankshaft, connecting rod bearings, timing chain tensioners, camshaft bearing caps and VCT solenoids. The flow of oil to the valve tappets and valve train is controlled by a restricting orifice located in the cylinder head gasket.
The lubrication system is designed to provide optimum oil flow to critical components of the engine through its entire operating range.
The heart of the system is a positive displacement internal gear oil pump.
Generically, this design is known as a gerotor pump, which operates as follows:
- The oil pump is chain driven off of the crankshaft.
- System pressure is limited by an integral, internally-vented relief valve which directs the bypassed oil back to the inlet side of the oil pump.
- Oil pump displacement has been selected to provide adequate volume to make sure of correct oil pressure both at hot idle and maximum speed.
- The relief valve calibration protects the system from excessive pressure during high-viscosity conditions.
- The relief valve is designed to provide adequate connecting rod bearing lubrication under high temperature and high-speed conditions.
Valve Train
The valve train uses DAMB. The camshaft lobes are positioned directly above mechanical buckets which are positioned on top of the valves.
Ti-VCT
The Ti-VCT system allows variable control of the valves which optimizes combustion at full load providing improved power and low speed torque (broadening the torque curve) which enables variable valve overlap which provides better fuel economy and emissions and provides optimized cold start operation with improved exhaust emissions.