2003 FORD MUSTANG timing

i
Measured at 42 mm from piston dome, at 90 degrees to the piston pin.
j Piston pin outer diameter is larger than piston pin bore, providing a possible interference fit.
k Specification in 90.200 mm diameter gauge.
l With installation of a new filter.
a "Fixed" refers to systems with manually- adjusted centers which are bolted in place and considered
fixed. Drive Belt Tension Belt Type Belt Tension
6 Rib (Fixed)
a 110-
120 Lbs
Torque Specifications Description Nm lb-
ft lb-
in Camshaft sprocket bolt 115 85 —
Connecting rod bolt a a a
Engine front cover bolt a a a
Drive belt tensioner bolts 25 18 —
Cylinder head bolt a a a
Pulley to crankshaft bolt a a a
EGR valve to intake manifold a a a
Exhaust manifold studs 25 18 —
Lower intake manifold-
to-cylinder head bolt a a a
Main bearing cap bolt a a a
Oil filter adapter bolt 25 18 —
Oil bypass filter to adapter 50 37 —
Oil pump screen cover and tube-
to-oil pump bolt 10 — 89
Oil pan-to-
cylinder block bolt a a a
Oil pan-to-
engine front cover bolts a a a
Oil pump-
to-cylinder block bolt 10 — 89
Oil pump screen and pickup tube-
to-main bearing cap stud spacer bolt 25 18 —
Coolant pump pulley bolts 25 18 —
Valve cover bolt 10 — 89
Coolant pump-
to-cylinder block bolt 25 18 —
EGR valve to exhaust manifold tube nuts 40 30 —
Power steering pump to engine 25 18 —
Outlet heater hose stud bolts 25 18 —
Camshaft cap cluster to cylinder head 10 — 89
Timing chain tensioner bolts—
primary 25 18 —
Timing chain tensioner bolts—
secondary 10 — 89
A/C compressor bolts 25 18 —
Ignition coil cover bolts 10 — 89
Generator mounting bracket retainers 10 — 89 Klj . 5 ba
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a
Refer to the procedure. Flexplate bolts 80 59 —
Flywheel bolts 85 63 —
Torque converter nuts 36 27 —
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 —
Accelerator cable bracket 10 — 89
Belt idler pulley bolt 25 18 —
Sub-
frame brace nuts 41 30 —
Air intake scoop bolts 25 18 —
Air intake scoop bracket bolt 25 18 —
Air intake scoop bracket nuts 25 18 —
Air intake scoop bracket throttle body nut 9 — 80
Exhaust gas recirculation (EGR) vacuum regulator solenoid bolts 10 — 89 Klj . 6 ba
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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) is a V- 8 engine with the following features:
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.
z are positioned so that their tips direct fuel just ahead of the engine intake valves.
SECTION 303-
01D: Engine — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Klj . 1 ba
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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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Item Part Number Description
1 6083 Cylinder head gasket
2 — Bolt (2 req'd)
3 — Washer (2 req'd)
4 6255 Spacer
5 — Secondary timing chain (2 req'd)
6 — Screw and washer
7 6C271 Timing chain vibration damper
8 6B277 Camshaft bearing cap Klj . 7 ba
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Item Part Number Description
1 N808102 Bolt
2 N808102 Bolt
3 19A216 Belt idler pulley
4 N806155 Bolt
5 6B288 Camshaft position sensor
6 N606543 Bolt (4 req'd)
7 6L266 Timing chain tensioner
8 W705803 Stud Klj . 9 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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IN-
VEHICLE REPAIR
Timing Drive Components
Removal CAUTION: Since the engine is not free- wheeling, if the crankshaft or the camshafts are
moved in any manner during removal and installation, the crankshaft and the camshafts must
be re- synchronized.
1. Remove the engine front cover. For additional information, refer to Engine Front Cover in this
section.
2. Remove the crankshaft sensor ring from the crankshaft.
3. 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.
Using the special tool, position the crankshaft as shown.
SECTION 303-
01D: Engine — Mach I 4.6L (4V) 2003 Mustang Workshop Manual Special Tool(s)
Holding Tool, Crankshaft
303-
448 (T93P-6303- A) Klj . 1 ba
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