engine FORD MUSTANG 2003 Workshop Manual

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.
z The inner rotor is piloted on the crankshaft post and is driven through flats on the crankshaft. Klj . 2 ba
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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 coolant 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 thermostat
z upper radiator hose
z lower radiator hose
z heater coolant 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
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9 6268 Timing chain (2 req'd)
10 6K297 Timing chain guide
11 6268 Timing chain (2 req'd)
12 6M269 Timing chain tensioner
13 6L253 Timing chain tensioner arm
14 N605893 Bolt (4 req'd)
15 6K297 Timing chain guide
16 N804958 Bolt (2 req'd)
17 6L253 Timing chain tensioner arm
18 6306 Crankshaft sprocket
19 12A227 Ignition pulse ring
20 3A696 Power steering pump
21 N806176 Bolt (4 req'd)
22 3R801 Gasket
23 3A696 Power steering pump pulley
24 W706508 Stud
25 N806177 Bolt (8 req'd)
26 N808586 Stud
27 N806300 Stud (4 req'd)
28 6700 Crankshaft front seal
29 N806155 Bolt
30 6C315 Crankshaft position sensor
31 W706560 Stud
32 6C086 Engine front cover
33 N806165 Washer
34 N806139 Bolt
35 19A216 Belt Idler Pulley
36 6316 Crankshaft pulley Klj . 10 ba
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DIAGNOSIS AND TESTING
Engine
Refer to
Section 303 - 00 for basic mechanical concerns or refer to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual for driveability concerns. SECTION 303-
01D: Engine — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
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IN-
VEHICLE REPAIR
Intake Manifold — Upper
Removal 1. Remove the air intake scoop bracket. For additonal information, refer to Section 303 - 12 .
2. Remove the air cleaner outlet tube. For additional information, refer to Section 303 - 12 .
3. Disconnect the accelerator cable, the speed control actuator cable and the return spring.
4. Remove the bolts, disconnect the clip and position the cables out of the way.
5. Disconnect the throttle position (TP) sensor. 6. Disconnect the evaporative emissions (EVAP) return hose. SECTION 303-
01D: Engine — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
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IN-
VEHICLE REPAIR
Intake Manifold — Lower
Removal 1. Remove the upper intake manifold. For additional information, refer to Intake Manifold — Upper
in this section.
2. Disconnect the fuel line. For additional information, refer to Section 310 - 00 .
3. Remove the coolant by- pass tube. For additional information, refer to Section 303 - 03A .
4. Remove the generator. For additional information, refer to Section 414 - 02 .
5. Disconnect the electrical connector and the vacuum line from the fuel pressure sensor.
6. Disconnect the eight fuel injector electrical connectors.
7. Separate the fuel charging wiring harness from the fuel injection supply manifold studs in three places.
SECTION 303-
01D: Engine — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Material
Item Specification
Metal Surface Cleaner
F4AZ-
19A536- RA or equivalent WSE-
M5B392- A Klj . 1 ba
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IN-
VEHICLE REPAIR
Valve Cover RH
Removal 1. Disconnect the battery ground cable. For additional information, refer to Section 414 - 01 .
2. Drain the cooling system. For additional information, refer to Section 303 - 03A .
3. Recover the refrigerant. For additional information, refer to Section 412 - 00 .
4. Remove the air cleaner outlet tube. For additional information, refer to Section 303 - 12 .
5. Remove the RH ignition coil cover bolts and the cover.
6. Disconnect the ignition coil electrical connectors.
SECTION 303-
01D: Engine — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Material
Item Specification
Metal Surface Cleaner
F4AZ-
19A536- RA or equivalent WSE-
M5B392-
A Silicone Gasket and Sealant
F7AZ-
19554- EA or equivalent WSE-
M4G323-
A4 PAG Refrigerant Compressor
Oil
F7AZ-
19589- DA (Motorcraft
YN- 12-C) or equivalent WSH-
M1C231-
B Klj . 1 ba
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Installation
1. NOTE: If the valve cover is not secured within four minutes, the sealant must be removed and
the sealing area cleaned with metal surface cleaner. Allow to dry until there is no sign of
wetness, or four minutes, whichever is longer. Failure to follow this procedure can cause future
oil leakage.
Apply a bead of silicone gasket and sealant in two places where the engine front cover meets
the cylinder head.
2. Install the RH valve cover and finger tighten the bolts. 3. Tighten the RH valve cover bolts in the sequence shown. Klj . 5 ba
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IN-
VEHICLE REPAIR
Valve Cover LH
Removal
All vehicles 1. Remove the air intake scoop. For additional information, refer to Section 303 - 12 .
2. Remove the Hydro- Boost brake booster. For additional information, refer to Section 206 - 07 .
3. Raise and support the vehicle. For additional information, refer to Section 100 - 02 .
Manual transmission vehicles
4. Remove the screw and the dust shield.
5. Disengage the clutch release cable from the clutch release fork.
SECTION 303-
01D: Engine — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Material
Item Specification
Metal Surface Cleaner
F4AZ-
19A536- RA or
equivalent WSE-
M5B392- A Silicone Gasket and Sealant
F7AZ-
19554- EA or equivalent WSE-
M4G323-
A4 Klj . 1 ba
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IN-
VEHICLE REPAIR
Crankshaft Pulley
Removal 1. Remove the accessory drive belt. For additional information, refer to Section 303 - 05 .
2. Raise and support the vehicle. For additional information, refer to Section 100 - 02 .
3. Remove the bolt.
4. Using the special tool, remove the crankshaft pulley.
SECTION 303-
01D: Engine — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Special Tool(s)
Remover, Crankshaft Vibration
Damper
303-
009 (T58P-6316- D) Installer, Crankshaft Vibration
Damper
303-
102 (T74P-6316- B) Klj . 1 ba
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