bolt pattern FIAT UNO 1983 Service Repair Manual

79Recover the gasket.
80Removal of the camshaft from the
housing, and inspection of the components is
described in the following sub-Section.
81Commence refitting by cleaning the
gasket mating surfaces of the camshaft
housing and cylinder head.
82Locate a new gasket on the cylinder head,
making sure that it is correctly positioned over
the dowels (photo).
83Ensure that the cam followers are
correctly located over their relevant valves.
84Liberally oil the cam follower bores in the
camshaft housing, then carefully lower the
housing over the cam followers, and onto the
cylinder head (photo). Some manipulation will
be required to engage the cam followers with
their relevant bores in the camshaft housing.85Loosely refit all the camshaft housing
securing bolts, ensuring that the washers are
in place under their heads, then tighten them
progressively to the specified torque, starting
at the centre of the housing and working
outwards in a spiral pattern (photo).
86Refit the upper section of the rear timing
belt cover.
87Refit the camshaft sprocket and the
timing belt as described previously in this
Section.
88Check the valve clearances as described
earlier in this Section.
89Refit the camshaft cover using a new
gasket, and tighten the securing nuts,
ensuring that the washers are in place
(photos). Where applicable, ensure that the
hose clip is in place before refitting therelevant camshaft cover securing nuts.
90The remainder of the refitting procedure is
a reversal of that given for removal.
Camshaft, housing and followers
- dismantling, inspection
and reassembly
#
91With the camshaft housing removed from
the cylinder head as previously described
proceed as follows.
92Unscrew the three securing bolts, and
withdraw the blanking plate from the end of
the camshaft housing. Recover the gasket.
93The camshaft can now be carefully
withdrawn from the blanking plate/distributor
end of the camshaft housing, taking care not
to damage the bearing journals (photo).
94With the camshaft removed, examine the
bearings in the camshaft housing, and the
cam follower bores for signs of obvious wear
or pitting. If evident, a new camshaft housing
will probably be required.
95The camshaft itself should show no signs
of marks or scoring on the journal or cam lobe
surfaces. If evident, renew the camshaft.
96Examine the cam followers for signs of
obvious wear, and for ovality, and renew if
necessary.
97It is advisable to renew the camshaft front
oil seal as a matter of course if the camshaft
has been removed. Prise out the old seal
using a screwdriver, and drive in the new seal
until it is flush with the housing, using a
suitable socket or tube (photos).
13•42 Supplement: Revisions and information on later models
7B.97B Inserting the new camshaft front
oil seal7B.97A Prising out the camshaft front oil
seal7B.93 Withdrawing the camshaft from its
housing
7B.89B . . . and refit the camshaft cover7B.89A Locate a new gasket on the
camshaft housing . . .
7B.85 Tightening a camshaft housing
securing bolt7B.84 Lowering the camshaft housing on
to the cylinder head7B.82 Locating a new camshaft housing
gasket on the cylinder head