Ford Falcon. Manual — part 123

303-01b-6

Engine — 5.4L (3V)

303-01b-6

DESCRIPTION AND OPERATION

Valve Train

Engine

The valve train operates as follows:

The 5.4L (3V) is a V-8 engine with the following

Ball tip hydraulic lash adjusters provide automatic

features:

lash adjustment.

dual overhead camshafts

Roller followers ride on the camshaft lobes,

three valves per cylinder

transferring the up-and-down motion of the

sequential multiport fuel injection (SFI)

camshafts to the valves in the cylinder heads.

an aluminum intake manifold

Positive Crankcase Ventilation System

aluminum cylinder heads

All engines are equipped with a closed-type positive

a cast iron, 90-degree V-cylinder block

crankcase ventilation system recycling the crankcase

individually chain-driven camshafts with a

vapors to the upper intake manifold.

hydraulic timing chain tensioner on each timing

chain

Lubrication System

the electronic ignition system with eight ignition

The engine lubrication system operates as follows:

coils

Oil is drawn into the oil pump through the oil

Identification

pump screen cover and tube in the sump of the oil

pan.

Always refer to these labels when new parts are

Oil enters the main oil gallery where it is

required or when checking engine calibrations. The

distributed to the crankshaft main journals and to

engine parts often differ within a CID family.

both cylinder heads.

Verification of the identification codes will make sure

that the correct parts are obtained. These codes

From the main journals, the oil is routed through

contain all the pertinent information relating to the

cross-drilled passages in the crankshaft to

dates, optional equipment and revisions. The Ford

lubricate the connecting rod bearings. Controlled

Master Parts Catalog contains a complete listing of

leakage through the crankshaft main bearings and

the codes and their application.

connecting rod bearings is slung radially outward

to cool and lubricate the cylinder walls as well as

Code Information

the entire connecting rod, piston and piston rings

assembly.

The engine code information label, located on the side

of the LH valve cover towards the rear, contains the

The left cylinder head is fed from a drilling into the

following:

supply passage feeding the main gallery at the

front of the cylinder block. The right cylinder head

engine build date

is fed from a drilling into the rear of the main

engine plant code

gallery. Main gallery pressure is reduced as it

engine code

enters the cylinder head galleries through fixed

serviceable orifices located at the upper part of

Induction System

the feed passages. It is this reduced pressure in

The sequential multiport fuel injection (SFI) provides

the cylinder head galleries which feeds the

the fuel/air mixture needed for combustion in the

camshaft journals, the hydraulic lash adjusters

cylinders. The eight solenoid-operated fuel injectors:

and the primary and secondary timing chain

tensioners.

are mounted in the fuel injection supply manifold

and the intake manifold above the cylinder heads.

The camshaft lobe and roller followers are

lubricated by splash created through valve train

meter fuel into the air intake stream in accordance

operation.

with engine demand.
are positioned so that their tips direct fuel just

Oil Pump

ahead of the engine intake valves.

The lubrication system of the 5.4L (3V) engine is

are connected in series with the fuel pressure

designed to provide optimum oil flow to critical

regulator.

components of the engine through its entire operating

supply fuel from the fuel tank by a fuel pump

range. The heart of the system is a positive

mounted in the fuel tank.

displacement internal gear oil pump using top seal

rotors.

A constant fuel pressure drop is maintained across

the fuel injectors by the fuel pressure regulator. The

Generically this design is known as a gerotor pump,

fuel pressure regulator:

which operates as follows:

is positioned upstream from the fuel injectors on

The oil pump is mounted on the front face of the

the fuel injection supply manifold.

cylinder block.

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303-01b-7

Engine — 5.4L (3V)

303-01b-7

DESCRIPTION AND OPERATION (Continued)

The inner rotor is piloted on the crankshaft post

and is driven through flats on 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 ensure 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.

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303-01b-8

Engine — 5.4L (3V)

303-01b-8

DIAGNOSIS AND TESTING

Engine

For basic engine mechanical concerns, refer to

Section 303-00. For driveability concerns, Refer to
Powertrain Control/Module in Section 303-14.

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303-01b-9

Engine — 5.4L (3V)

303-01b-9

IN-VEHICLE REPAIR

10. Remove the ten (10) bolts that secure the intake

Intake Manifold Upper

manifold.

Removal
1. Relieve the fuel pressure. Refer to chapter 310-00

Fuel System.

2. Disconnect the battery ground cable. For

additional information, refer to Section 414-01.

3. Remove PCV hose from LH valve cover.
4. Remove the air cleaner outlet from throttle body.

For additional information, refer to Section

303-12.

5. Disconnect the electrical connectors from throttle

body motor.

6. Disconnect the electrical connectors from the

MAP sensor.

7. Disconnect the electrical connectors from the

alternator.

8. Remove the four (4) screws securing the fuel rail

to the intake manifold.

11. Lift intake manifold and throttle body.
12. Disconnect the brake booster vacuum line from

the intake manifold.

9. Remove the fuel rail and fuel injectors as one

13. Remove the intake manifold.

assembly gently.

14. Remove the intake gasket.

CAUTION: Do not use metal scrapers,

wire brushes, power abrasive discs or other

abrasive means to clean the sealing surfaces.

These tools cause scratches and gouges

which make leak paths. Use a plastic scraping

tool to remove all traces of old sealant.

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