Page 484 of 1226

Engine - I .25L Duratec-1 6V (Sigma)llI4L
Duratec-1 6V (Sigma)ll .6L Duratec-I 6V (Sigma)
SPECIFICATIONS
1 Description I Nm I Ib-ft I Ib-in I
I Camshaft pulley retaining bolt I 60 I 44 I - I
Timing belt tensioner two bolts fixing
Timing belt tensioner central bolt fixing
Crankshaft position (CKP) sensor bracket to
cylinder block retaining bolts
I Crankshaft rear oil seal carrier retaining bolts I 9 1 - I 80 I
20
25
I Cylinder block blanking plug I 20 I 15 1 - I
I Crankshaft pulley retaining bolt I a) I - I - I
15
18
I Engine coolant temperature (ECT) sensor I 18 I 13 I - I
-
-
I Exhaust manifold studs I 10 I - I 89 I
Positive crankcase ventilation (PCV) cover retaining
1 bolts Fuel
rail to intake manifold
Knock sensor (KS) retaining bolt
I Thermostat housing retaining bolts I 9 I - 1 80 I
I Flywheel to crankshaft retaining bolts I a) I - I - I
15
20
I Selector lever cable bracket to transaxle I 20 I 15 I I
11
15
Transaxle retaining bolts
Torque converter retaining nuts
I Intermediate shaft center bearing cap retaining nuts 1 25 I 18 I - I
-
-
I Ground cable to cylinder head retaining bolt I 18 I 13 I - I
47
27
Suspension strut and spring assembly top mount
retaining nuts
I a) Refer to procedure in this section.
35
20
2006.0 Fiesta 1212006 GI 54208en
-
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Page 486 of 1226

303-01 A-I 0
Engine - I .25L Duratec-1 6V (Sigma)ll.4L
Duratec-1 6V (Sigma)/l .6L Duratec-1 6V (Sigma)
DESCRIPTION AND OPERATION
Engine Engine emission control
Cross-mounted 16-valve DOHC engines with 59 European emissions level IV
kW (80 PS) and 74 kW (1 00 PS) respectively.
European on-board diagnosis (EOBD) for the
Valve train with mechanical bucket tappets monitoring of emissions-relevant components.
Cylinder block and cylinder head made of an
aluminium alloy
Diagnosis
Auxiliary drive via a self-tensioning belt without a
belt tensioner WDS diagnosis CD
817.
Instrument cluster (engine indicator lamp)
Engine management
Sequential multi-port fuel injection (SFI)
temperature and manifold absolute pressure (T-MAP) sensor in conjunction with a Siemens
powertrain control module (PCM).
Knock control
PCM with 84 pins and integrated passive anti-theft
system (PATS) immobiliser. Torquelpower
The Duratec 16V engines are characterised by
their high level of running refinement, low emission
levels and balanced development of power.
Description Description
Power curve for the 1.6L-Duratec 16V 3 Torque curve for the 1.6L-Duratec 16V ( ',I
Power curve for the 1.4L-Duratec 16V 4
Torque
curve for the 1.4L-Duratec 16V
2006.0 Fiesta 1212006 GI 7901 7en
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Page 495 of 1226

Engine - 1.25L Duratec-I 6V (Sigma)ll.4L
303-01A-I 9 Duratec-1 6V (Sigma)/l .6L Duratec-1 6V (Sigma) 303-OIA-I 9
IN-VEHICLE REPAIR
Intake Manifold(21 183 0)
Removal 6. Remove the intake manifold lower retaining
bolt.
A WARNING:Do not smoke or carry lighted
tobacco or open flame of any type when
working on or near any fuel related
components. Highly flammable mixtures
are always present and may ignite. Failure
to follow these instructions may result in
personal injury.
1. Release the fuel system pressure. For
additional information, refer to
Section
31 0-00 [Fuel System - General
Information].
2. Disconnect the battery ground cable. For
additional information, refer to
Section
414-01 [Battery, Mounting and 7. Disconnect the engine wiring harness
Cables]. electrical connector.
3. Remove the air cleaner. For additional
information, refer to Section
303-1 2 [Intake
Air Distribution and Filtering].
4. Detach the power steering fluid reservoir
from the bracket and position
it to one side.
5. Remove the accessory drive belt. For
additional information, refer to
Section
303-05 [Accessory Drive].
8. Disconnect the positive crankcase ventilation
(PCV) hose from the PCV.
2006.0 Fiesta 1212006 GI 83728en
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Page 497 of 1226
Engine - 1.25L Duratec-I 6V (Sigma)ll14L
Duratec-1 6V (Sigma)ll16L Duratec-1 6V (Sigma)
IN-VEHICLE REPAIR
15. Disconnect the generator electrical 17. Disconnect the fuel injector electrical
connector. connectors and
position it with the engine
i wiring harness to one side.
16. Detach the generator from the engine.
1. Remove the bolts.
2. Remove the nut and the stud.
18. Disconnect the engine coolant temperature
(ECT) sensor electrical connector.
2006.0 Fiesta 1~12006 GI 83728en
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Page 498 of 1226
Engine - 1.25L Duratec-1 6V (Sigma)llI4L
Duratec-1 6V (Sigma)/l .6L Duratec-1 6V (Sigma)
IN-VEHICLE REPAIR
19. Disconnect the fuel supply line quick Discard the O-ring seals.
release coupling. For additional
information, refer to Section
31 0-00 [Fuel
System
- General Information].
20. Disconnect the fuel return line quick release
coupling. For additional information, refer
to Section
31 0-00 [Fuel System - General
Information].
21. Detach the fuel line from the intake
manifold and position
it to one side.
Remove the cable tie.
22.
Remove the fuel supply manifold.
23. Detach the wiring harness and the coolant
hose from the intake manifold.
24. Detach the wiring harness from the intake
manifold.
25. Remove the intake manifold.
2006.0 Fiesta 1212006 GI 83728en
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Page 499 of 1226
Engine - 1.25L Dura
303-01 A-23 Duratec-1
6V (Sigma)ll .(
:ec-I 6V (Sigma)llm4L
L
Duratec-1 6V (Sigma)
303-01 Am23
IN-VEHICLE REPAIR
Discard the gaskets.
Installation
3. Attach the wiring harness and the coolant
hose to the intake manifold.
4. N0TE:lnstall new injector O-ring seals.
1. N0TE:lnstall new intake manifold gaskets. N0TE:Coat the 0-rina seals with clean enaine oil.
Install the intake manifold. V "
Install the fuel supply manifold.
2. Attach the wiring harness to the intake
manifold. 5. Connect the fuel return line quick release
coupling. For additional information, refer to
Section
31 0-00 [Fuel System - General
Information].
2006.0 Fiesta 1212006 GI 83728en
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Page 500 of 1226
Engine - 1.25L Duratec-1 6V (Sigma)llI4L
Duratec-1 6V (Sigma)/l .6L Duratec-1 6V (Sigma)
IN-VEHICLE REPAIR
6. Connect the fuel supply line quick release
coupling. For additional information, refer to
Section 310-00 [Fuel System
- General
Information].
7. Attach the fuel line to the intake manifold.
Install the cable tie. 8.
Connect the fuel injector electrical
connectors.
9. Connect the engine coolant temperature
(ECT) sensor electrical connector.
10. Attach the generator to the engine.
1. Install the stud and nut.
2006.0 Fiesta 1212006 GI 83728en
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Page 504 of 1226

Engine - I .25L Duratec-1 6V (Sigma)llm4L
303-01 A-28 Duratec-1 6V (Sigma)llm6L Duratec-1 6V (Sigma) 303-01 A-28
IN-VEHICLE REPAIR
Valve Cover(21 141 0)
Materials 4. Remove the valve cover. (. ,
Name Specification
I Silicone grease IESE-MlC171-AA I
Removal
A WARNING:Do not smoke or carry lighted
tobacco or open flame of any type when
working on or near any fuel related
components. Highly flammable mixtures
are always present and may ignite. Failure
to follow these instructions may result
in
personal injury.
1. Disconnect the battery ground cable. For
additional information, refer to
Section
414-01 [Battery, Mounting and
Cables].
2. Remove the air cleaner. For additional
information, refer to Section
303-12 [Intake
Air Distribution and Filtering].
3. Disconnect the spark plug electrical
connectors and detach the wires from the
valve cover.
Installation
1. N0TE:Check the valve cover gasket for
damage and install a new valve cover gasket
if necessary.
N0TE:lnstall the stud bolts to positions 5 and 6.
Install the valve cover.
Tighten the bolts in the sequence shown in
three stages.
Stage 1: Tighten bolt 1 by 3 to 4 turns.
Stage 2: Tigthen bolts 1 through 13 to 3 Nm.
Stage 3: Tigthen bolts 1 through 13 to 9 Nm.
2m ACAUTION:~~~ a suitable blunt object to
avoid damage to the spark plug connector
gasket. Coat the inside of the spark plug
connector with silicone grease to depth of
5-10 mm.
- - --
2006.0 Fiesta 1212006 GI 83729en
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