change time FORD SIERRA 1987 2.G SOHC Engines Workshop Manual

wires, hoses, pipes and cables, otherwise,
unbolt the manifold and move it to one side,
ensuring that it is adequately supported.
11If not already done, unclip any wires and
hoses from the camshaft cover, noting their
locations for use when refitting, and on fuel
injection models unbolt the bracing strut
securing the inlet manifold to the right-hand
side of the cylinder head.
12If desired, remove the thermostat and
housing, and the temperature gauge sender.
13Proceed as described in Section 21 for
cylinder head removal.
Refitting
14With the cylinder head refitted as
described in Section 21, proceed as follows.
15Where applicable, refit the temperature
gauge sender and the thermostat and
housing.
16Refit the manifolds and/or reconnect all
wires, hoses, pipes and cables, as applicable.
17Reconnect the exhaust downpipe to the
manifold, using a new gasket.
18Refit the coolant hose to the clip on the
exhaust manifold hot air shroud.
19Refit the spark plugs and reconnect the
HT leads.
20Reconnect the temperature gauge sender
wiring.
21Reconnect the coolant hoses to the
thermostat housing.
22Fill the cooling system.
23If not already done, refit any hoses and
wires to the camshaft cover, as noted during
removal, and on fuel injection models refit the
inlet manifold bracing strut. If splined type
cylinder head bolts have been used, leave
these operations until the bolts have been
finally tightened after running the engine.
24Refit the air cleaner on carburettor
models.
25Reconnect the battery negative lead.
26If splined type cylinder head bolts have
been used, start the engine and run it at 1000
rpm for 15 minutes, then stop the engine,
remove the air cleaner and the camshaft cover
as described previously, and finally tighten the
cylinder head bolts to the fourth stage (see
Specifications). Refit the camshaft cover on
completion, then refit any hoses and wires,
and on fuel injection models the inlet manifold
bracing strut. Refit the air cleaner.Note: Up to early 1984, splined type cylinder
head bolts were used, and from early 1984,
size T55 Torx bolts were used. Torx type bolts
must always be renewed after slackening. The
two types of bolts are interchangeable, but
only in complete sets - the two types must not
be mixed on the same engine. A suitable
special socket will be required for removal of
the bolts, and a new cylinder head gasket
must be used when refitting.
Removal
1With the manifolds removed, proceed as
follows.
2Remove the timing belt.
3Where applicable, disconnect the breather
hose from the camshaft cover.
4Unscrew the ten securing bolts and remove
the camshaft cover and gasket. Take care not
to lose the spacer plates which fit under the
bolt heads, where applicable.
5Using the relevant special socket, unscrew
the ten cylinder head bolts half a turn at a time
in the reverse order to that shown for
tightening.
6With the bolts removed, lift the cylinder
head from the block. If the cylinder head is
stuck, tap it free with a wooden mallet. Place
the cylinder head on blocks of wood to
prevent damage to the valves.
7Recover the gasket.
Refitting
8Commence refitting as follows.
9With the cylinder head supported on blocks
of wood, check and if necessary adjust thevalve clearances. This work is easier to carry
out on the bench rather than in the vehicle.
10Turn the crankshaft so that No 1 piston is
approximately 20 mm (0.8 in) before TDC.
This precaution will prevent any damage to
open valves.
11Make sure that the mating faces of the
cylinder block and cylinder head are perfectly
clean, then locate the new gasket on the
block making sure that all the internal holes
are aligned (see illustration). Do not use
jointing compound.
12Turn the camshaft so that the TDC pointer
on the camshaft sprocket backplate is aligned
with the indentation on the front of the
cylinder head.
13Lower the cylinder head onto the gasket.
The help of an assistant will ensure that the
gasket is not dislodged.
14Lightly oil the cylinder head bolt threads
and heads, then insert the bolts into their
locations in the cylinder head. Note that if the
original bolts were of the Torx type, new bolts
must be used when refitting.
15Using the relevant special socket, tighten
the bolts in the correct sequence (see
illustration)to the stages given in the
Specifications. Note that the bolt tightening
stages are different for splined and Torx type
bolts. If splined type bolts are used, they must
be finally tightened to the fourth stage after
the engine has been run for 15 minutes (see
Specifications).
16Check the condition of the camshaft
cover gasket and renew if necessary. Fit the
gasket to the camshaft cover, ensuring that
the locating tabs and dovetails are correctly
located, then refit the camshaft cover and
tighten the securing bolts in the order shown
(see Chapter 1, Section 23), ensuring that the
spacer plates are in position under the bolt
heads, where applicable.
17Where applicable, reconnect the breather
hose to the camshaft cover.
18Refit the timing belt.
21Cylinder head - removal and
refitting (engine removed)
SOHC engines 2A¥15
2A
21.15 Cylinder head bolt tightening sequence
21.11 Fitting a new cylinder head gasket
Tap a stuck cylinder head
free with a wooden mallet.
Do not insert a lever into the
head joint as this may
damage the mating faces.