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4 Engine -
903 and 1299/1301 cc
Sump pan sealing strips (903 cc
engine) - modification
1 The design of the sealing strips which go
between the sump pan and the main bearing
caps has been changed. Make sure that the
narrower side of the strip fits into the channel
in the sump pan.
1299 cc engine - description
2 In April 1984, a 1299 cc engine was
introduced, progressively replacing the
1301 cc units used previously. The new
engine is identical to the 1301 cc engine
described in Chapter 1, with the exception of
having a slightly shorter stroke.
3 However, as of approximately September
1987, the 1299 cc unit was phased out, being
progressively replaced by the 1301 cc engine
used initially.
4 As mentioned above, the two engines are
all but identical, so identification of the unit
fitted should not be necessary in practice.
Consult a FIAT dealer if in doubt.
Rocker cover (903 cc engine) -
removal
5 Before removing the rocker cover, it will be
necessary to remove the distributor, first.
Refer to Chapter 4 for more details.
Cylinder head (903 cc engine) -
refitting
6 Modified cylinder head bolts are fitted to
903 cc models, from engine number 8581470.
When refitting the cylinder head, tighten each
head bolt, as described in Chapter 1, by the
torques and angles shown the Specifications
in this Chapter.
5 Engine -
999 and 1108 cc (FIRE)
Note: Later models are fitted with SPi fuel
injection. Where a procedure refers to a
carburettor, if applicable, replace with throttle
body.
PART A: GENERAL
Description
1 Both of these engine types are designated
FIRE (Fully Integrated Robotised Engine),
being largely manufactured and assembled by
computer-controlled mechanical robots.
2 The engine is of oversquare design, having
four cylinders and a belt-driven overhead
camshaft.
3 The high torque of this engine enables
higher gear ratios to be used with the result
that fuel economy is exceptionally good.
4 The cylinder head is of light alloy, while the
cylinder block is cast-iron.
5 The camshaft is supported in three
bearings which have detachable caps.
6 Valve clearances are maintained by shims
located in the cam followers (tappets).
7 The cylinder head is of crossflow type
having the intake manifold (coolant-heated)
and exhaust manifold on opposite sides.
8 The pistons have two compression rings
and one oil control ring and are connected to
the connecting rods by means of a gudgeon
pin which is an interference fit in the rod
small-end.
9 The crankshaft is supported in five main
bearings. The upper section of the centre
bearing shell retains semi-circular thrust
washers to control crankshaft endfloat.
10 The oil pump, which is of gear type, is
Supplement: Revisions and information on later models 13•19
Fig. 13.2 Cross-section view of the 999 and 1108 cc engine (Sec 5A)
Fig. 13.1 Correct method of fitting sump
pan sealing strip (Sec 4)
13