Overview
The 2.0L Duratec GDI engine which may also be described with these terms:
FSAO 2.0L Duratec HE (125kW/170PS) - MI4/2.0L Duratec - HE Flex Fuel (129kW/175PS):
China - North America 2.0L Duratec HE (129kW/175PS):
The 2.0L Twin Independent Variable Cam Timing (Ti-VCT) Gasoline Direct Injection (GDI) 4-cylinder engine has the following features:
Engine Identification
Always refer to these labels when installation of new parts is necessary or when checking engine calibrations. The engine parts often differ within a CID family. Verification of the identification codes will make sure the correct parts are obtained. These codes contain all the pertinent information relating to the dates, optional equipment and revisions.
Engine Code Information Label
The engine code information label, located on the front cover, contains the following:
Item | Description |
---|---|
1 | Engine part number |
2 | Bar code |
3 | Dearborn engine plant |
4 | Engine displacement |
5 | Bar code |
6 | Bar code |
6 | Running number |
7 | Engine build date (DDMMYY) |
8 | Plant shift line |
Engine Cylinder Identification
Oil Flow Diagram
Lubrication System
Item | Description |
---|---|
Yellow | High pressure oil flow |
Blue | Oil return/low pressure oil flow |
System Operation
Valve Train
The valve train uses Direct Acting Mechanical Buckets (DAMB). The camshaft lobes are positioned directly above mechanical buckets which are positioned on top of the valves.
Twin Independent Variable Cam Timing (Ti-VCT) System
The Twin Independent Variable Cam Timing (Ti-VCT) system allows variable control of the valves that 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.
PCV System
All engines are equipped with a closed-type Positive Crankcase Ventilation (PCV) system recycling the crankcase vapors to the intake manifold.
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: