2003 FORD MUSTANG engine oil

a
Refer to the procedure. Oil pan-to-
engine front cover bolts a — — —
Oil pump-
to-cylinder block bolt 10 — 89
Radio ignition interference capacitor bolts 25 18 —
Oil pump screen and pickup tube-
to-main bearing cap stud spacer bolt 25 18 —
Water pump pulley bolts 25 18 —
Throttle body spacer nuts 25 18 —
Vacuum accessory bracket fasteners 10 — 89
Valve cover bolt 10 — 89
Wiring harness support bracket 25 18 —
Water pump-
to-cylinder block bolt 25 18 —
EGR valve to exhaust manifold tube nuts 40 30 —
Power steering pump to engine 25 18 —
Power steering hose bracket nut 25 18 —
Power steering reservoir bracket fasteners 10 — 89
Supercharger degas bottle bolts 10 — 89
Camshaft cap cluster to cylinder head 10 — 89
Timing chain tensioner bolts—
primary 25 18 —
Timing chain tensioner bolts—
secondary 10 — 89
Ignition coil cover bolts 10 — 89
Generator mounting bracket retainers 10 — 89
Oil level indicator tube retainer 10 — 89
Primary timing chain guide-
to-engine bolts 10 — 89
Oil pump screen and pickup tube spacer to main bearing stud 25 18 —
Belt idler pulley bolt 25 18 —
Subframe brace nuts 41 30 — Klj . 5 ba
62003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

DESCRIPTION AND OPERATION
Engine
WARNING: Do not operate the engine with the hood open until the fan blade has been first
examined for possible cracks and separation.
The 4.6L (4V) (281 CID) Cobra engine is a V- 8 with the following features:
z intercooled supercharger
z dual overhead camshafts
z four valves per cylinder
z sequential multiport fuel injection (SFI)
z an aluminum intake manifold
z aluminum cylinder heads
z a cast aluminum, 90-degree V- cylinder block
z individually chain- driven camshafts with a hydraulic timing chain tensioner on each timing chain
z the electronic ignition system with eight ignition coils
Identification
Always refer to these labels when replacement parts are necessary or when checking engine
calibrations. The engine parts often differ within a CID family. Verification of the identification codes will
ensure that the correct parts are obtained. These codes contain all the pertinent information relating to
the dates, optional equipment and revisions. The Ford Master Parts Catalog contains a complete
listing of the codes and their application.
Code Information
The engine code information label, located on the side of the valve cover and the front side of the
valve cover, contains the following:
zengine build date
z engine plant code
z engine code
Exhaust Emission Control System
Operation and necessary maintenance of the exhaust emission control devices used on this engine is
covered in the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
Induction System
The sequential multiport fuel injection (SFI) provides the fuel/air mixture needed for combustion in the
cylinders. The eight solenoid- operated fuel injectors:
z are mounted in the lower intake manifold.
z meter fuel into the air intake stream in accordance with engine demand.
SECTION 303-
01C: Engine — Cobra 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
162003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

z
are positioned so that their tips direct fuel just ahead of the engine intake valves.
z are connected in series with the fuel pressure sensor.
z supply fuel from the fuel tank with a fuel pump mounted in the fuel tank.
A constant fuel pressure drop is maintained across the fuel injectors by the fuel pressure sensor. The
fuel pressure sensor:
zis positioned upstream from the fuel injectors on the fuel injection supply manifold.
Valve Train
The valve train operates as follows:
zball- tip hydraulic lash adjusters provide automatic lash adjustment.
z roller followers ride on the camshaft lobes, transferring the up-and- down motion of the
camshafts to the valves in the cylinder heads.
Positive Crankcase Ventilation System
All engines are equipped with a closed- type positive crankcase ventilation system recycling the
crankcase vapors to the upper intake manifold.
Lubrication System
The engine lubrication system operates as follows:
zoil is drawn into the oil pump through the oil pump screen cover and tube in the sump of the oil
pan.
z oil is pumped through the oil bypass filter on the left front side of the cylinder block.
z oil enters the main oil gallery where it is distributed to the crankshaft main journals and to both
cylinder heads.
z From the main journals, the oil is routed through cross- drilled passages in the crankshaft to
lubricate the connecting rod bearings. Controlled leakage through the crankshaft main bearings
and connecting rod bearings is slung radially outward to cool and lubricate the cylinder walls as
well as the entire connecting rod, piston and piston rings assembly.
z The left cylinder head is fed from a drilling into the supply passage feeding the main gallery at
the front of the cylinder block. The right cylinder head is fed from a drilling into the rear of the
main gallery. Main gallery pressure is reduced as it enters the cylinder head galleries through
fixed serviceable orifices located at the upper part of the feed passages. It is this reduced
pressure in the cylinder head galleries which feeds the camshaft journals, the hydraulic lash
adjusters and the primary and secondary timing chain tensioners.
z The camshaft lobe and roller followers are lubricated by splash created through valve train
operation.
Oil Pump
The lubrication system of the 4.6L (4V) engine 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 using top seal rotors. Generically this design is known as a gerotor
pump, which operates as follows.
zThe oil pump is mounted on the front face of the cylinder block. Klj . 2 ba
162003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

z
The inner rotor is piloted on the crankshaft post and is driven through flats on the crankshaft.
z 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.
z Oil pump displacement has been selected to provide adequate volume to ensure correct oil
pressure both at hot idle and maximum speed.
z The relief valve calibration protects the system from excessive pressure during high viscosity
conditions.
z The relief valve is designed to provide adequate connecting rod bearing lubrication under high-
temperature and high- speed conditions.
Cooling System
The engine cooling system includes the following:
zradiator
z water pump
z the electric cooling fan motor and fan blade, activated by the variable control module
z the degas bottle, which aids in maintaining the correct volume of engine coolant
z water thermostat
z upper radiator hose
z lower radiator hose
z heater water hoses
Drive Belt System
The 4.6L (4V) DOHC engine is equipped with a serpentine drive belt. To ensure maximum life, a
replacement drive belt should be of the same type as originally installed.
zThe accessories mounted on the front of the engine are belt- driven by the crankshaft.
z The serpentine drive belt is routed over each accessory pulley, driven by the crankshaft pulley
bolted to the crankshaft.
For service procedures, including tensioning, refer to Section 303 - 05 . Klj . 3 ba
162003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

IN-
VEHICLE REPAIR
Valve Cover RH
Removal and Installation 1. Remove the RH ignition coils. For additional information, refer to Section 303 - 07C .
2. Remove the A/C condenser to evaporator tube. For additional information, refer to Section 412 -
03 .
3. Remove the A/C manifold and tube assembly. For additional information, refer to Section 412 -
03 .
4. Disconnect the throttle position (TP) sensor and the idle air control (IAC) valve electrical connectors.
5. Disconnect the vacuum hose.
6. Disconnect the fuel hose spring lock coupling. For additional information, refer to Section 310 -
00 .
SECTION 303-
01C: Engine — Cobra 4.6L (4V) 2003 Mustang Workshop Manual Material
Item Specification
Silicone Gasket and Sealant
F7AZ-
19554- EA WSE-
M4G323- A4 Metal Surface Cleaner
F4AZ-
19A536- RA WSE-
M5B392- A Klj . 1 ba
52003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

IN-
VEHICLE REPAIR
Valve Cover LH
Removal and Installation 1. Remove the Hydro Boost brake booster. For additional information, refer to Section 206 - 07 .
2. Remove the LH ignition coils. For additional information, refer to Section 303 - 07C .
3. Disconnect the engine coolant temperature (ECT) sensor and unclip the wiring harness from the stud.
4. Unclip the wiring harness from the power steering bracket.
5. Disconnect the electrical connectors from the fuel pulse damper, EGR vacuum regulator solenoid, supercharger bypass vacuum solenoid, and the differential pressure feedback EGR
system.
SECTION 303-
01C: Engine — Cobra 4.6L (4V) 2003 Mustang Workshop Manual Material
Item Specification
Silicone Gasket and Sealant
F7AZ-
19554- EA WSE-
M4G323- A4 Metal Surface Cleaner
F4AZ-
19A536- RA WSE-
M5B392- A Klj . 1 ba
62003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

IN-
VEHICLE REPAIR
Crankshaft Front Seal
Removal 1. Remove the crankshaft pulley. For additional information, refer to Crankshaft Pulley in this
section. 2. Using the special tool, remove the crankshaft front seal. SECTION 303-
01C: Engine — Cobra 4.6L (4V) 2003 Mustang Workshop Manual Special Tool(s)
Installer, Front Cover Oil Seal
303-
335 (T88T-6701- A) Remover, Crankshaft Front Oil
Seal
303-
107 (T74P-6700- A) Installer, Crankshaft Front Oil
Seal
303-
635 Installer, Crankshaft Vibration
Damper
303-
102 (T74P-6316- B)
Material Item Specification
SAE 5W-
20 Premium Synthetic
Blend Engine Oil
XO- 5W20- QSP or equivalent WSS-
M2C153-
H Klj . 1 ba
32003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

Installation
1. Lubricate the engine front cover and the crankshaft front seal inner lip with clean engine oil.
2. Using the special tool, install the crankshaft front seal.
3. Install the crankshaft pulley. For additional information, refer to Crankshaft Pulley in this section.
4. Install the auxiliary crankshaft pulley. For additional information, refer to Crankshaft Pulley —
Auxiliary in this section. Klj . 2 ba
32003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...