1983 FIAT UNO oil filter

Supplement: Revisions and information on later models 13•7
View of engine compartment (air
cleaner removed) on the
1372 cc ie engined model
1 Engine oil level dipstick
2 Timing belt cover
3 Engine mounting (right-hand)
4 Clutch master cylinder fluid
reservoir
5 Fuel supply and return hoses
6 Injection unit
7 Inlet manifold
8 Washer reservoir
9 Brake master cylinder and fluid
reservoir
10 Injection system fuse/relay block
11 Suspension strut turret
12 Ignition coil
13 Ignition system ECU
14 Battery
15 Coolant filter expansion tank
16 Ignition distributor
17 Radiator cooling fan
18 Engine oil filler cap
19 Starter motor
20 Oil filter
View of front end from below on
the 1031 cc Turbo ie engined
model
1 Anti-roll bar
2 Exhaust pipe
3 Track control arm
4 Engine centre mounting
5 Gearchange rods
6 Brake caliper
7 Left-hand driveshaft
8 Intermediate driveshaft
9 Right-hand driveshaft
10 Transmission
11 Engine oil drain plug
12 Auxiliary lamp
13 Horn
14 Intercooler
15 Starter motor
16 Oil filter cartridge
17 Oil pressure sender unit
18 Engine oil cooler
19 Right-hand underwing shield
20 Left-hand underwing shield
13

Lubrication system
Oil pump type:
999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gear driven from front of crankshaft.
1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pump operated from front of crankshaft. Oil pressure relief valve in
front cover.
Tooth tip-to-body clearance (999/1108 cc) . . . . . . . . . . . . . . . . . . . . . . 0.080 to 0.186 mm
Gear endfloat:
999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.025 to 0.056 mm
1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.040 to 0.106 mm
Oil pressure (at normal operating temperature) . . . . . . . . . . . . . . . . . . . 3.4 to 4.9 bars
Oil filter:
999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion F107
1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Champion C106
Torque wrench settingsNm lbf ft
Auxiliary shaft sprocket bolt (1372 cc) . . . . . . . . . . . . . . . . . . . . . . . . . . 83 62
Big-end cap bolts:
999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 30
1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 38
Camshaft bearing cap bolts:
M8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 14
M6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7
Camshaft cover screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6
Camshaft housing to lower cylinder head securing bolt (1372 cc) . . . . . 20 15
Camshaft housing to inlet manifold bracket bolt (1372 cc) . . . . . . . . . . 25 18
Camshaft sprocket bolt
999/1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 50
1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 62
Centre mounting to final drive casing bracket (1201/1301 cc) . . . . . . . . 23 17
Coolant temperature switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 18
Crankshaft pulley bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 18
Crankshaft pulley nut (1372 cc) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197 145
Crankshaft rear oil seal retainer bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7
Crankshaft sprocket bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 58
13•8 Supplement: Revisions and information on later models
View of front end from below on
the 1372 cc ie engine model
1 Oil filter
2 Engine oil drain plug
3 Starter motor
4 Horns
5 Transmission front mounting
6 Front fog lamp and adjuster
7 Driveshaft
8 Transmission rear mounting
9 Gearchange linkage
10 Exhaust downpipe and system
joint
11 Anti-roll bar
12 Track control arm
13 Tie-rod balljoint
14 Brake unit
15 Driveshaft damper
16 Underwing shield

General dimensions, weights and capacities
Dimensions
Overall length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3689 mm
Overall width:
Base and Super models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1558 mm
SX and Turbo models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1562 mm
Height (unladen):
1372 cc (except Turbo) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1425 mm
1299/1301 cc (except Turbo) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1420 mm
Turbo . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1405 mm
All other models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1415 mm
Weights (kerb)
Note: 3-door model weights are given. Add 15 kg to the following for 5-door models. Weight will also vary according to the model version.
903 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 740 kg
999 cc (45, 45 S and 45 SX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 740 to 775 kg
1108 cc (60 S and 60 SX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 760 to 795 kg
1299/1301 cc (70 SX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 770 kg
1301 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 845 kg
1372 cc (1.4 ie S catalyst) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 830 kg
1372 cc ie (70 SX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 795 to 845 kg
1732 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 925 kg
Capacities
Fuel tank:
1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 litres
All other models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 litres
Engine oil (with filter change):
903, 999 and 1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.8 litres
1116, 1299/1301 and 1372 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.1 litres
Transmission:
1301 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.9 litres
1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.0 litres
All other engines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.4 litres
Cooling system:
903, 999 and 1108 cc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.6 litres
1116 and 1299/1301 cc, non-catalyst 1372 cc ie . . . . . . . . . . . . . . . 6.2 litres
1372 cc ie with catalyst . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.5 litres
1301 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.9 litres
1372 cc Turbo ie . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.7 litres
Supplement: Revisions and information on later models 13•17
13

13•18 Supplement: Revisions and information on later models
Every 9000 miles (15 000 km) or
12 months (whichever comes first)
m mCheck the tyre pressures and their condition
(including the spare)
m mWhere a pad wear warning light is fitted, check its
operation
m mCheck the front brake disc pads for excessive wear
m mCheck the underbody condition (fuel and brakes
pipes, exhaust system, hoses, bushes and gaiters)
m mCheck the condition and tension of drivebelts
m mCheck the engine idle speed and CO emissions
m mCheck the EGR system (If fitted)
m mCheck fluid levels (coolant, brake fluid and
windscreen washer)
m mRenew spark plugs (1372 cc Turbo models)
m mRenew the engine oil and oil filter (non-Turbo
models)
m mCheck the HT leads and connections
m mCheck the condition of all coolant, fuel and
hydraulic hoses and connections
Every 18 000 miles (30 000 km) or
24 months (whichever comes first)
In addition to the items listed for 9000 mile (15 000 km) or 12 months
service
m mCheck the rear brake disc pads for wear (where
applicable)
m mCheck/adjust the valve clearances
m mCheck and tighten (if necessary), inlet and exhaust
manifolds
m mCheck the clutch adjustment (cable operated
models)
m mRenew the fuel filter (where applicable)
m mRenew the air cleaner element
m mRenew the spark plugs and check the HT leads
and connections (all models)
m mWhere applicable, have the ignition and injection
systems checked (special equipment needed)
m mRenew coolant
m mRenew brake fluid
Every 28 000 miles (45 000 km) or
36 months (whichever comes first)
In addition to the items listed for 9000 mile (15 000 km) or 12 months
service
m mCheck Lambda (oxygen) sensors operation (special
equipment needed)
m mCheck fuel evaporation system (where fitted)
m mCheck the transmission oil level
m mCheck the condition crankcase ventilation system
Every 37 000 miles (60 000 km) or
48 months (whichever comes first)
In addition to the items listed for 18 000 mile (30 000 km) or
24 months service
m mCheck the condition of the rear brake shoe linings
m mCheck the condition of the timing belt
Every 65 000 miles (105 000 km)
m
mRenew the timing belt
Every 74 500 miles (120 000 km)
m
mRenew the manual transmission oil
Every 250 miles (400 km), weekly or
before a long journey
m mProceed as described for the earlier models at the
start of this manual
Every 6000 miles (10 000 km) or
12 months (whichever comes first)
m mRenew the engine oil and oil filter (Turbo models
only)
3 Routine maintenance- all models from June 1991
The maintenance intervals in this manual are provided with the
assumption that you, not the dealer, will be carrying out the work.
These are the minimum maintenance intervals recommended by us, for
vehicles driven daily. If you wish to keep your vehicle in peak condition
at all times, you may wish to perform some of these procedures more
often. We encourage frequent maintenance, since it enhances the
efficiency, performance and resale value of your vehicle.
If the vehicle is driven in dusty areas, used to tow a trailer, or driven
frequently at slow speeds (idling in traffic) or on short journeys, more
frequent maintenance intervals are recommended.
When the vehicle is new, it should be serviced by an authorised
dealer to preserve the factory warranty.

Sump pan -
removal and refitting Á
60Drain the engine oil.
61Unbolt and remove the cover plate from
the lower part of the flywheel housing (photo).
The two lower bolts retain the gearchange rod
support strut.
62Unscrew the sump pan securing screws
and pull the sump pan downwards to remove
it (photo). The joint sealant will require cutting
with a sharp knife to release the pan. Clean
away all old gasket material.
63A bead 3.0 mm in diameter of RTV
silicone instant gasket should be applied to
the sump pan flange and then the pan offered
up. Screw in the fixing screws and tighten to
the specified torque. Note the flange end
fixing screw nuts (photos).64Wait one hour before filling with engine oil.
65Refit the flywheel housing cover plate.Oil pump - removal,
checking and refitting#
66Drain the engine oil and remove the sump
pan as described in the last sub-Section.
Unscrew and remove the oil filter cartridge.
67Remove the timing belt.
68Lock the crankshaft against rotation either
by placing a block of wood between a
crankshaft web and the inside of the
crankcase or by jamming the flywheel starter
ring gear with a suitable tool.
69Unscrew and remove the crankshaft
sprocket bolt and take off the timing belt
sprocket. If it is tight, use two screwdrivers to
lever it off or use a two- or three-legged puller.
70Unbolt and remove the oil pick-up/filter
screen assembly. Note the sealing washer.71Extract the oil pump fixing bolts and
withdraw the pump.
72The oil pump incorporates a pressure
relief valve which can be removed for
examination by depressing the spring plunger
and pulling out the keeper plate (photos).
73If pump wear is suspected, check the
gears in the following way. Extract the fixing
screws and remove the rear cover plate. The
screws are very tight and will probably require
the use of an impact driver to release them
(photo).
74Check the clearance between the outer
gear and the pump housing using feeler
blades, and also the gear endfloat by placing
a straight-edge across the pump body and
checking the gap between the straight-edge
and gear face. If the clearances are outside
the specified tolerance, renew the oil pump
complete (photos).
13•24 Supplement: Revisions and information on later models
5B.74B Checking the oil pump gear
endfloat5B.74A Checking the oil pump gear-to-
housing clearance5B.73 Removing the oil pump rear cover
plate screws
5B.72B Oil pump relief valve components5B.72A Removing the oil pump relief valve
keeper plate5B.63B Sump pan flange end fixing screw
and nut
5B.63A Tightening a sump pan screw5B.62 Removing the sump pan5B.61 Removing the flywheel housing
cover plate

75If the pump is unworn, refit the rear cover
plate and tighten the screws fully.
76Apply air pressure from a tyre pump to the
oil pump oil ducts to clear any sludge or other
material and then prime the pump by pouring
clean engine oil into its intake duct at the
same time turning the oil pump inner gear with
the fingers.
77Lever out the oil seal and drive a new one
squarely into the oil pump casing (photos).
Lubricate the oil seal lips.
78Bolt the pump into position using a new
joint gasket. Note one bolt is longer than the
others (photo).
79Bolt on the oil pick-up assembly using a
new sealing washer.
80Fit the crankshaft sprocket and tighten the
bolt to specified torque.
81Fit and tension the timing belt.
82Fit the sump pan. Screw on a new oil filter
cartridge. Wait for the specified period of time
(one hour) and then fill the engine with oil.
83Run the engine for a few minutes, then
check and top up the oil level.
Pistons/connecting rods -
removal and refitting#
84Remove the sump pan.
85Unbolt and remove the oil pump
pick-up/filter screen assembly.
86The big-end bearing shells can be
renewed without having to remove the
cylinder head if the caps are unbolted and the
piston/connecting rod pushed gently about
one inch up the bore (the crankpin being at its
lowest point). If these shells are worn,however, the main bearing shells will almost
certainly be worn as well, necessitating a
complete overhaul, including crankshaft
removal.
87To remove the piston/connecting rods,
the cylinder head must be removed.
88The big-end caps and their connecting
rods are numbered 1, 2, 3 and 4 from the
timing cover end of the engine. The numbers
are located either side of the rod/cap joint on
the engine oil dipstick tube side (photo).
89Turn the crankshaft as necessary to bring
the first connecting rod big-end crankpin to its
lowest point, then unscrew the cap bolts and
remove the cap and shell bearing.
90Push the connecting rod/piston assembly
up the bore and out of the cylinder block.
There is one reservation; if a wear ridge has
developed at the top of the bores, remove this
by careful scraping before trying to remove
the piston/rod assemblies. The ridge will
otherwise prevent removal, or break the
piston rings during the attempt.
91Remove the remaining piston/connecting
rods in a similar way. If the bearing shells are
to be used again, tape them to their
respective caps or rods.
92Removal of the piston rings and
separation of the piston from the connecting
rod is covered in the next sub-Section.
93Fit the bearing shells into the connecting
rods and caps, ensuring that the recesses into
which the shells seat are clean and dry.
94Check that the piston ring gaps are evenly
spaced at 120º intervals. Liberally oil the rings
and the cylinder bores.95Fit a piston ring clamp to compress the
rings, oiling the rings and the clamp interior
surfaces liberally.
96Insert the first piston/connecting rod into
its cylinder bore. Make sure that the assembly
is the correct one for its particular bore. The
cap and rod matching numbers must be
towards the engine oil dipstick guide tube and
the arrow on the piston crown towards the
timing belt (photo).
97Push the piston into the bore until the
piston ring clamp is against the cylinder block
and then tap the crown of the piston lightly to
push it out of the ring clamp and into the bore
(photo).
98Oil the crankshaft journal and fit the
big-end of the connecting rod to the journal.
Check that the bearing shells are still in
position, then fit the big-end cap and bolts;
check that the cap is the right way round
(photo).
Supplement: Revisions and information on later models 13•25
5B.78 Fitting the oil pump5B.77B Using a socket to fit the new oil
pump oil seal5B.77A Removing the oil pump seal
5B.98 Fitting a big-end bearing cap
5B.88 Connecting rod and cap numbers
5B.97 Fitting a piston/connecting rod5B.96 Piston directional arrow
13

99Tighten the big-end bolts to the specified
torque (photo). The correct torque is
important as the bolts have no locking
arrangement. After tightening each big-end,
check that the crankshaft rotates smoothly.
100Repeat the operations on the remaining
piston/rod assemblies.
101Refit the oil pump pick-up assembly
using a new sealing ring.
102Refit the sump pan and the cylinder head
as described in earlier sub-Sections.
103Fill the engine with oil and coolant.
Pistons/connecting rods -
separation and piston
ring renewal
ª
104If the piston/connecting rods have been
removed in order to renew the piston rings,
refer to Chapter 1, Section 18, but note thatthe piston rings should be fitted so that the
word TOP is uppermost.
105If new pistons are to be fitted, it is
recommended that the gudgeon pins are
removed and refitted by a FIAT dealer as the
connecting rods must be carefully heated in
order to be able to push the gudgeon pin out
of the rod small-end, change the piston and
push the pin back into position. Locating the
gudgeon pin will require a special tool. The
gudgeon pin is a sliding fit in the piston but an
interference fit in the connecting rod.
106Refer to Fig. 13.6 for the correct
assembly of the piston and connecting rod.
Engine/transmission mountings
- renewal
107Refer to Chapter 1, Section 33. Three
mountings are used (photos).
PART C: ENGINE REMOVAL
AND DISMANTLING
Method of removal - general
1The engine, complete with transmission,
should be removed upwards out of the engine
compartment.
Engine/transmission -
removal and separation #
Warning: Refer to the beginning
of Section 9 before starting any
work.
2Mark the position of the hinges on the
underside of the bonnet and then, with the
help of an assistant, unscrew the hinge bolts
and lift the bonnet to a safe storage area.
3Drain the coolant; a cylinder block drain
plug is not fitted.
4Drain the engine and transmission oils.
5Disconnect the battery, negative lead first.
6Remove the air filter.
7Disconnect the radiator hoses from the
engine (photos).
13•26 Supplement: Revisions and information on later models
5C.7B Radiator hose at thermostat
housing5C.7A Radiator hose connection to coolant
distribution tube5B.107C Right-hand engine mounting
5B.107B Left-hand rear
engine/transmission mounting5B.107A Left-hand front
engine/transmission mounting
Fig. 13.6 Piston/connecting rod correctly
assembled - 999 and 1108 cc engine
(Sec 5B)
1 Piston grade (A) and directional arrow on
piston crown (towards timing belt)
2 Rod/cap matching numbers
3 Gudgeon pin offset in piston (0.9 to 1.1 mm)
Arrow indicates crankshaft rotation direction
Fig. 13.5 Piston ring arrangement on the
999 cc engine (Sec 5B)5B.99 Tightening a big-end cap bolt

can be lowered to rest on the exhaust and
bodymember.
34Continue to raise the engine and the
transmission until it can be removed from the
engine compartment and placed on the work
surface (photo).
35Clean the exterior of the engine and
transmission by steam cleaning or using a
water soluble solvent.
36Unbolt and remove the starter motor.
37Unscrew the flywheel housing-to-engine
flange bolts. Note the location of the engine
lifting lug.
38Unbolt and remove the lower cover plate
from the flywheel housing.
39Pull the transmission from the engine. It is
located by two hollow dowels and one stud
(photo).
Dismantling - general
40Refer to Chapter 1, Section 14.
Complete dismantling#
Warning: Refer to the beginning
of Section 9 before starting any
work.
41Unbolt and remove the camshaft cover.
42Unbolt and remove the timing belt cover.
43Remove the distributor (Section 10).
44Remove the hot air collector and the
exhaust manifold.
45Release, disconnect and remove the
coolant distribution pipe from the rear of the
coolant pump.46Unscrew and discard the oil filter
cartridge.
47Unbolt the thermostat housing, discard
the joint gasket.
48Remove the fuel pump, together with its
insulator block and actuating pushrod, if
applicable.
49Remove the carburettor, or throttle body,
as appropriate.
50Remove the inlet manifold and discard the
joint gasket.
51Remove the alternator and its drivebelt
and withdraw the engine oil dipstick.
52Unbolt and remove the crankshaft pulley.
53Unbolt and remove the timing belt
tensioner.
54Remove the timing belt.
55Unbolt and remove the coolant pump.
56Remove the cylinder head.
57Remove and discard the cylinder head
gasket.
58Remove the clutch.
59Lock the flywheel starter ring gear teeth
and remove the crankshaft sprocket bolt and
sprocket.
60Unbolt and remove the sump pan,
then the exhaust pipe support bracket
(photos).
61Prevent rotation of the crankshaft by
locking the starter ring gear teeth and then
unbolt and remove the flywheel. The flywheel
can only be fitted in one position as it is
located on a dowel.
62Remove the engine rear plate. Note thesmall socket-headed screw which holds the
timing index plate (photo).
63Unbolt and remove the oil pump pick-up
assembly, followed by the oil pump itself.
64Turn the engine on its side and remove
the piston/connecting rod assemblies.
65Stand the engine on its cylinder block
machined face, and then unbolt and remove
the crankshaft rear oil seal retainer. Discard
the gasket.
66Note the markings on the main bearing
caps. One line on the cap nearest the timing
belt, then two, C for centre cap, then three
and four (photo).
67The caps will only fit one way round.
68Unbolt the main bearing caps, removing
them with the shell bearings.
69Lift the crankshaft from the crankcase and
remove the bearing half shells from the
Supplement: Revisions and information on later models 13•29
5C.39 Separating the engine and
transmission5C.34 Lifting out the engine and
transmission5C.32 Right-hand engine mounting
brackets on body and engine
5C.66 Main bearing cap markings
5C.60A Removing the sump pan
5C.62 Unscrewing socket-head screw
from timing index plate5C.60B Exhaust pipe support bracket
attached to crankcase
13