lock FORD MUSTANG 2003 Workshop Manual

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
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7. Remove the air cleaner outlet tube. For additional information, refer to
Section 303 - 12 .
8. Disconnect the throttle position (TP) sensor and the idle air control (IAC) valve electrical connectors.
9. Disconnect the vacuum hose.
10. Disconnect the fuel hose spring lock coupling. For additional information, refer to Section 310 -
00 .
11. Disconnect the accelerator controls. zDisconnect the accelerator cable.
z If equipped, disconnect the speed control cable. 12. Remove the accelerator cable bracket bolts. Klj . 2 ba
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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
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IN-
VEHICLE REPAIR
Crankshaft Pulley — Auxiliary
Removal and Installation 1. Remove the cooling fan. For additional information, refer to Section 303 - 03A .
2. Remove the supercharger drive belt cover.
3. Rotate the supercharger belt tensioner clockwise and remove the supercharger belt. 4. Remove the coolant hose assembly bolt. SECTION 303-
01C: Engine — Cobra 4.6L (4V) 2003 Mustang Workshop Manual Special Tool(s)
Locking Tool, Flywheel
303-
673 Klj . 1 ba
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4.
CAUTION: The camshaft timing marks must be correctly lined up or damage to the
valves and pistons can occur.
NOTE: The copper links on the timing chain may not line up with the timing marks on the
sprockets.
Make sure the timing marks on the camshaft sprockets are correctly positioned. If necessary,
turn the crankshaft one full turn clockwise to correctly position the sprockets.
5. NOTE: LH shown; RH similar.
Remove the two bolts, the timing chain tensioner (6L266) and tensioner arm (6L253).
6. CAUTION: Unless otherwise instructed, at no time when the timing chains are
removed and the cylinder heads are installed is the crankshaft or the camshaft to be
rotated. Severe piston and valve damage will occur.
Remove the LH and RH timing chains and the crankshaft sprocket (6306).
zRemove the special tool from the crankshaft.
z Remove the RH timing chain from camshaft sprocket.
z Remove the RH timing chain from the crankshaft sprocket.
z Remove the LH timing chain from the camshaft sprocket.
z Remove the LH timing chain and crankshaft sprocket. Klj . 2 ba
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3. If the copper links are not visible, mark one link on one end and one link on the other end, and
use as timing marks.
4. Install the timing chain guides.
5. Rotate the LH camshaft sprocket until the timing mark is approximately at the 12 o' clock position. Rotate the RH camshaft timing sprocket until the timing mark is approximately in the
11 o' clock position.
6. CAUTION: Unless otherwise instructed, at no time when the timing chains are Klj . 4 ba
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removed and the cylinder heads are installed is the crankshaft or the camshaft to be
rotated. Severe piston and valve damage will occur.
CAUTION: Rotate the crankshaft counterclockwise only. Do not rotate past position
shown or severe piston or valve damage will occur.
Using the special tool, position the crankshaft.
7. Remove the special tool.
8. Install the crankshaft sprocket with the flange facing forward.
9. NOTE: LH timing chain shown; RH similar.
Install the LH timing chain onto the crankshaft sprocket, aligning the one copper link on the
timing chain (6268) with the slot on the crankshaft sprocket.
10. Verify the camshaft sprocket to copper link alignment. Klj . 5 ba
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5. Remove the special tool.
6. Compress the tensioner (6L266) and install a lock pin.
7. Remove the timing chain, the sprocket, and intake camshaft sprocket spacer.
8.
NOTE: LH shown; RH similar.
Remove the bolts. Klj . 2 ba
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3. Install the bolts.
4.
CAUTION: Timing marks must be at 12 o'clock and indexed at 6 o'clock.
Install the camshaft sprockets and the chain as an assembly.
5. Remove the lockpin from the chain tensioner. Klj . 5 ba
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IN-
VEHICLE REPAIR
Exhaust Manifold LH
Removal and Installation 1. Position the steering wheel straight ahead and lock the column.
2. Disconnect the battery ground cable. For additional information, refer to Section 414 - 01 .
3. Raise the vehicle. For additional information, refer to Section 100 - 02 .
4. Remove the dual converter Y- pipe. For additional information, refer to Section 309 - 00 .
5. Remove and discard the pinch bolt.
6. Separate the steering coupler.
7. Disconnect the exhaust gas recirculation (EGR) tube at the exhaust manifold.
SECTION 303-
01C: Engine — Cobra 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
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