Page 501 of 1226
Engine - 1.25L Duratec-1 6V (Sigma)ll.4L
Duratec-1 6V (Sigma)ll .6L Duratec-1 6V (Sigma)
IN-VEHICLE REPAIR
2. Install the bolts.
I I. Connect the generator electrical connector.
12. Connect the throttle plate control motor
(DC-ISC) electrical connector.
13. Connect the temperature and manifold
absolute pressure (T-MAP) sensor electrical
connector.
14. Attach the oil level indicator tube to the
intake manifold.
15. Connect the knock sensor (KS) electrical
connector.
2006.0 Fiesta 1212006 GI 83728en
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Page 506 of 1226
Engine - 1.25L Duratec-1 6V (Sigma)ll.4L
Duratec-1 6V (Sigma)ll.GL Duratec-1 6V (Sigma)
IN-VEHICLE REPAIR
Valve Seals(21 238 0)
Special Tool(s)
I I Compressor, Valve Spring I
I I Adapter for 303-361
Installer, Valve Stem Collets
303-362 (2
1 - 1 56)
Adapter, Air Supply (Cylinder
Head)
303-363
(2 I -1 57)
Pliers, Valve Stem Oil
303-508 (21 -21
1 )
I Engine oil I WSS-M2C912A1 I
Materials
Removal
\\.
1. Remove the camshafts.
Name
Specification
For additional information, refer to
Camshafts in this section.
2. Remove the engine rear lifting eye.
3m ~CAUTION:K~~~ the valve tappets in order
for reassembly.
Remove the valve tappets.
4. Install the special tools.
5. Apply 7 to 10 bar of compressed air into the
cylinder.
1
6. Using the special tool, remove the valve
springs.
Compress the valve spring.
Remove the valve collets.
2006.0 Fiesta 1212006 GI 83730en
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Page 507 of 1226
Engine - 1.25L Duratec-1 6V (Sigma)ll.4L
303-01A-31 Duratec-1 6V (Sigma)/l .6L Duratec-1 6V (Sigma) 303-01 A-31
IN-VEHICLE REPAIR
Remove the valve spring retainer and the
valve springs.
7. Using the special tool, remove the valve
seals.
N0TE:lnstall new valve seals.
N0TE:Coat the valve seal lip and the valve stem
with clean engine oil.
Using the special tool, install the valve seal.
Discard the valve seals. 3. Remove the mounting sleeve.
4. Using the special tool, install the valve
springs.
lnstall the valve spring retainer and the valve
springs.
Compress the valve spring.
Install the valve collets.
Installation
1, Install a valve stem mounting sleeve over
the valve
collet groove (valve shown
removed for clarity).
*' ACAUTION:T~~ intake valve seal are
colored green, and the exhaust valve seals
are colored brown.
5. Remove the special tools.
2006.0 Fiesta 1212006 GI 83730en
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Page 509 of 1226

Engine - 1.25L Duratec-1 6V (Sigma)ll.4L
303-01 A-33 Duratec-1 6V (Sigma)ll.GL Duratec-1 6V (Sigma) 303-01 A-33
IN-VEHICLE REPAIR
Camshafts(21 284 0)
Special Tool(s)
Materials
Name Specification
/ 15030A
21 171
1 Sealant I WSK-M2G348-A2 I
Universal Flange Holding
Wrench
205-072
Installer, Crankshaft Seal
303-395
I Engine Oil I WSS-M2C912A1 I
3m ~AUTION:K~~~ the camshaft bearing
caps in order for
installation.
Remove the camshafts.
Slacken each camshaft bearing cap retaining
bolt in the sequence shown by one turn until
the camshaft is released.
Remove the camshaft bearing caps.
Remove and discard the camshaft
seals.
I
i Installation
Removal
1. Apply sealant to the points indicated on the
I. Remove the timing belt. camshaft bearing
cap no. 1 and to the mating
surface of the
cylinder head.
For additional information, refer to: Timing
Belt (303-01 Engine - 1.25L Duratec-1 6V
(Sigma)ll.4L Duratec-1 6V (Sigma)ll.GL
Duratec-1 6V (Sigma), In-vehicle Repair).
2m ~~~~~10N:lnstall a hose (order no.
E890438S) to the special tool studs, to
prevent damage to the camshaft
pulleys.
Remove the camshaft pulleys.
Discard the retaining bolts.
2. Coat the camshafts and the camshaft bearing
caps with
clean engine oil.
3m A~A~T10N:~osition the camshafts in place
so that none of the cams are at full lift.
N0TE:The camshaft bearing cap numbering starts
at the timing
belt end with El on the exhaust side
and with
I1 on the intake side.
N0TE:The exhaust camshaft has an additional
cam for the camshaft position (CMP) sensor.
2006.0 Fiesta 1212006 GI 83731 en
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Page 510 of 1226

Engine - 1.25L Duratec-16V (Sigma)llI4L
303-01 A-34 Duratec-1 6V (Sigma)ll .6L
Duratec-1 6V (Sigma)
303-01 A-34
IN-VEHICLE REPAIR
Install the camshafts and camshaft bearing 7. Install the timing belt.
caps.
For additional information, refer to: Timing
Tighten the camshaft bearing cap retaining Belt (303-01 Engine - 1.25L Duratec-1 6V
bolts in the sequence shown in three stages. (Sigma)ll.4L Duratec-1 6V (Sigma)ll .6L
Stage 1: One half turn on each bolt until all Duratec-1 6V (Sigma), Invehicle Repair).
of the camshaft bearing caps are in contact
with the cylinder head.
Stage
2: 7 Nm.
Stage
3: 45 degrees.
4. Adjust the valve clearances.
For additional information, refer to: Valve
Clearance Adjustment (303-01 Engine -
1.25L Duratec-1 6V (Sigma)ll.4L
, Duratec-1 6V (Sigma)ll .6L Duratec-1 6V
(Sigma), General Procedures).
5. NOTE:
Install new camshaft seals.
N0TE:Coat the camshaft journals and camshaft
seal lip with clean engine oil.
Using the special tool, install the camshaft
seals.
6. N0TE:Do not fully tighten the camshaft
pulley retaining bolts at this stage. Make sure
the camshaft
pulleys turn on the camshafts.
Install the camshaft pulleys.
2006.0 Fiesta 1212006 GI 83731 en
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Page 511 of 1226

Engine - 1.25L Duratec-1 6V (Sigma)llI4L
303-01 A-35 Duratec-1 6V (Sigma)lll6L Duratec-1 6V (Sigma) 303-01 Am35
IN-VEHICLE REPAIR
Camshaft Seal(21 288 0)
Special Tool(s) Discard the retaining bolts.
Materials
Name Specification
I Engine Oil I WSS~~C~I 2~1
3. Using the special tool, remove the camshaft
seal.
Discard the oil seal.
- -
15030A
Removal
Installation
I. Remove the timing belt. 1. N0TE:lnstall a new camshaft seal.
For additional information, refer to: Timing
Belt (303-01 Engine
- 1.25L Duratec-1 6V N0TE:Coat the camshaft journals and camshaft
(Sigma)ll.4L Duratec-1 6V (Sigma)ll .6L seal with clean engine oil.
Duratec-1 6V (Sigma), in-vehicle Repair).
Using the special tool, install the camshaft
oil seal.
*' &~~~l~~:lnstall a hose (order no.
E890438S) to the special tool studs, to
prevent damage to the camshaft pulleys.
303-395
I
21 171
Universal Flange Holding
Wrench
205-072
Remover, Crankshaft Seal
303-293
Installer, Crankshaft Seal
Remove the camshaft pulleys.
2006.0 Fiesta 1212006 GI 83732en
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Page 515 of 1226
Engine - 1.25L Duratec-1 6V (Sigma)ll.4L
303-01 A-39 Duratec-1 6V (Sigma)/l .6L
Duratec-1 6V (Sigma)
303-01 A-39
IN-VEHICLE REPAIR
3. Remove the nut and the stud. 15. Remove the engine front mount bracket.
&AUTION:D~ not support the engine 16. Using the special tool, remove the spark
directly on the oil pan. plugs.
Place the trolley jack with a wooden block
under the engine and raise
it slightly until
the engine front mount is free from strain.
13. Remove the engine front mount.
Discard the nuts.
14. Remove the timing belt upper cover.
Engines with eccentric cam timing belt
tensioner
17. Slacken the timing belt tensioner and
remove the timing belt.
Discard the timing belt.
2006.0 Fiesta 1212006 GI 83738en
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Page 530 of 1226

Engine - I .25L Duratec-1 6V (Sigma)llI4L
303-01 A-54 Duratec-1 6V (Sigma)/l .6L Duratec-1 6V (Sigma)
303-01 A-54
IN-VEHICLE REPAIR
Cylinder Head(21 163 0)
1 I Socket, Cylinder Head Bolts I
Discard the gasket and the nuts. (
Removerllnstaller, Hose
Clamp
303-397 (24-003)
I 24003 1 1 5. Raise and support the vehicle.
Removal
I I 1 For additional information, refer to: Lifting
(100-02 Jacking and Lifting, Description
1. Release the fuel system pressure.
Materials
For
additional information, refer to: Fuel
System Pressure Release (31 0-00 Fuel
System - General Information, General
Procedures). and
Operation).
2. Drain the
cooling system.
For
additional information, refer to: Cooling
System Draining, Filling and Bleeding
(303-03 Engine Cooling - 1.4L
Duratorq-TDCi (DV) Diesel, General 7. Remove the exhaust manifold lower heat
Procedures). shield left-hand retaining bolts.
3. Remove the camshaft.
Name
Specification
6. Using a suitable splint or wrap support the
For
additional information, refer to:
Camshafts
(303-01 Engine - 1.25L
Duratec-1 6V (Sigma)ll.4L Duratec-1 6V
(Sigma)ll.GL Duratec-1 6V (Sigma),
In-vehicle Repair).
Engine oil I WSS-M2C912-A1
4. Detach the exhaust flexible pipe from the
catalytic converter. exhaust
flexible pipe.
8. Remove the exhaust manifold lower heat
shield right-hand retaining bolts.
2006.0 Fiesta 1212006 GI 83740en
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