Timing Chain, Sprockets And Tensioner - Examination And Renovation; Cylinder Head - Removal And Refitting (Engine In Vehicle) - Ford Scorpio Owner's Manual

2B•10 DOHC engine
15.19 Coppered link in timing chain aligned
with crankshaft sprocket timing mark
(arrowed)
prevent the chain from dropping into the
timing case, as during removal.
18 Locate the double chain sprocket loosely
over the end of the crankshaft (larger sprocket
nearest the crankcase), with the timing mark
pointing vertically down.
19 Fit the chain over the inner, larger
sprocket, aligning the coppered link in the
chain with the timing mark on the sprocket
(see illustration).
20 Coat the threads of the lower timing chain
guide lower securing bolt with a suitable
thread-locking compound.
21 Introduce the lower timing chain guide
through the top of the
manipulating the chain around the guide as
necessary, then fit the chain guide lower
securing bolt and tighten it finger-tight.
22 Push the double chain sprocket onto the
crankshaft, engaging the notch in the sprocket
with the groove in the end of the crankshaft.
23 Proceed as described in paragraphs 34 to 42
of Section 18, but when fitting the chain over the
camshaft sprockets, align the timing mark on
each sprocket between the two corresponding
coppered links in the chain.
24 Coat the threads of the lower timing chain
guide upper securing bolt with a suitable
thread-locking compound, then fit the bolt and
tighten it finger-tight.
25 Proceed as described in paragraphs 43 to 46
of Section 18.
26 Tighten the two chain guide securing bolts
to the specified torque.
27 Proceed as described in paragraphs 47 to 55
of Section 18.
28 Fit the oil pump drive chain around the
outer crankshaft sprocket and the oil pump
sprocket, then refit the oil pump sprocket, and
tighten the securing bolt to the specified
torque. If necessary, a screwdriver can be
inserted through one of the holes in the
sprocket to prevent it from turning as the
securing bolt is tightened.
29 Refit the oil pump drive chain tensioner,
and tighten the securing bolt to the specified
torque.
30 Refit the Woodruff key to the end of the
crankshaft.
31 Inspect the oil seal in the lower timing
chain cover. If the oil seal is in good condition,
15.31 Fitting a new lower timing chain
the cover can be refitted as follows, but if the
seal is damaged, or has been leaking, a new
seal should be fitted to the cover. If necessary,
carefully prise the old oil seal from the cover
using a screwdriver, and drive in the new seal
using a suitable metal tube. Make sure that the
seal lip faces into the engine. Note that the oil
seal should be fitted dry. Take care not to
damage
illustration).
32 Fit the lower timing chain cover using a
new rubber gasket (see illustration).
33 Loosely refit the timing chain cover
securing bolts.
34 Refit the crankshaft pulley to the end of the
timing case,
crankshaft, and draw the pulley onto the
crankshaft using the original securing bolt, at the
same time centering the lower timing chain cover.
35 With the lower timing chain cover
centralised, and the pulley fully home on the
crankshaft, remove the old securing bolt, then
fit a new bolt.
36 Tighten the new crankshaft pulley bolt to
the specified torque, in the two stages given in
the Specifications at the beginning of this
Chapter. Prevent the crankshaft from turning
as during removal.
37 Tighten the lower timing chain cover
securing bolts to the specified torque.
38 Refit the drivebelt tensioner assembly,
ensuring that the lug on the rear of the
tensioner
corresponding hole in the cylinder block, and
tighten the securing bolt.
17.5 Disconnecting the heater coolant hose
cover oil seal
the timing chain cover
bracket engages with
from the inlet manifold
15.32 Lower timing chain cover gasket in
position. Ensure that lug on gasket
engages with notch in cover (arrowed)
39 Swing the alternator into position to align
the upper mounting bolt hole with the
corresponding hole in the drivebelt tensioner
assembly, then refit the upper mounting bolt,
and tighten the upper bolt and the lower
through-bolt.
40 Refit the water pump/alternator drivebelt.
41 If the engine is in the vehicle, reverse the
(see
operations described in paragraph 1 of
Section 15.
42 Where applicable, refill the cooling
system.
16 Timing chain, sprockets and
tensioner - examination and
renovation
1 Examine all the teeth on the camshaft and
crankshaft sprockets. If the teeth are "hooked"
in appearance, renew the sprockets.
2 Examine the chain
sprocket for wear. If excessive wear is evident,
the complete tensioner assembly must be
renewed as the sprocket cannot be renewed
independently. Note that the tensioner plunger
assembly must be renewed whenever the
timing chain is removed.
3 Examine the timing chain for wear. If the
chain has been in operation for a considerable
time, or if when held horizontally (rollers
the
vertical) it takes on a deeply bowed
appearance, renew it.
17 Cylinder head - removal and
refitting (engine in vehicle)
Note: The cylinder head must not be removed
when the engine is warm. Refer to the note at
the beginning of the following Section before
proceeding.
1 Disconnect the battery negative lead.
2 On carburettor models, remove the air
cleaner.
3 On fuel-injection models, remove the air
inlet hose, plenum chamber, and air cleaner lid
as an assembly.
4 Drain the cooling system.
5 Disconnect the heater coolant hose from
the inlet manifold (see illustration).
tensioner plastic