Lotus TURBO ESPRIT Service Manual page 154

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SECTION EA Page
7 7
Refit the toothed belt snu!her (where fitted) loosley onto inlet camshaft
housing, with the eccentric sleeve fitted on the lower stud, and 'Loctite'
applied to the nut threads.
If
i t has been removed, refit the woodruff key to the front end of the camshaft,
and replace camshaft sprocket together with i t s large plain washer spring
washer and retaining bolt. I t i s ESSENTIAL that the sprockets are fitted
the correct way round on each camshaft,
i
.e.
"IN
-
coloured dot' facing
forward on inlet camshaft and
"EX
-
coloured dot'' facing forward on
exhaust camshaft. See 'TECHNICAL DATA' for correct specification.
On engines without air pump: f i t the selective thrust washer with its retaining
bolt, and spring washer, ensuring that i t i s located on the dowel protruding
from the rear end of the camshaft. Hold the camshaft sprocket i n the vice
(fig.3.). Tighten thrust washer and sprocket retaining bolt tospecified
loading (see TECHNICAL DATA). Replace rear cover with new
'0'
ring,
tightening the
bolts
to their specified torque loading. Check the Camshaft
end-float (see TECHNICAL DATA).
If
the end-float i s outside this tolerance,
replace the selective thrust washer.
On engines equipped with an air pump: apply Permabond
A1
38 thread locking
compound to the threads of the 'V' pulley adaptor spindle, and screw into the
rear of the camshaft securely. Fit the selective thrust washer over its locating
dowel, and f i t the rear seal housing using a new
'0'
ring andoil seal. Apply
Silastic RTV 732 into the inside of the 'V' pulley hub, and f i t onto the adaptor
spindle, ensuring that the dowel engages into the hub correctly.
F i t
the 'V'
pulley onto the hub with the drive line insettowards theengine, f i t the
M8
washer and self locking nut and torque tighten (see TECHNICAL'DATA). Check
the camshaft end float
-
0.03
-
0.20 m m (0.001 -0.008 in.).
If
outside of
tolerance, replace selective thrust was her.
Fit the four washers and setscrews securing the 'V' pulley to the pulley hub
and tighten.
Replace cam follower shims onto the ends of the valve stems, these being
greased (with graphogen grease) on the valve stem side. Replace the cam
followers into their respective bores i n the camshaft housing, after an
application of graphogen grease.
I n order to avoid damaging the valves when thecamshaft housings are replaced,
I t i s ESSENTIAL that the crankshaft i s turned BACK approximately
90'
from
i t s TDC position, to bring the pistons half way down the cylinders. Do not
turn the crankshaft more than 90' back a s this may also cause the valves
to
be damaged.
On engines up to engine number 11276, using a new gasket, which i s DRY
and kept
FREE O F OIL,
replace the camshaft housing with its securing
washen and nuts. Tighten the nuts to their specified loadings diagonally
'
outwards from the centre.