1980 FIAT 127 Front wheel a

diagram child seat heating brake light turn signal steering

Page 7 of 34

FIAT 127 1980 2.G Workshop Manual Fiat 127 Internet Fan Club (http://fiat127.okruhy.cz) Fiat 127 - 1050
7/34
Camshaft bearing bore diameter in head:
Valve ge

Fiat 127 Internet Fan Club (http://fiat127.okruhy.cz) Fiat 127 - 1050
7/34
Camshaft bearing bore diameter in head:
Valve gear end 1.1807 to 1.1817 29.990 to 30.015
Centre 1.0648 to 1.0657 27.045 to 27.070
Flywheel end 0.9860 to 0.9870 25.045 to 25.070
Camshaft journals fit clearance 0.0012 to 0.0028 0. 030 to 0.070
Cam lift (C, L and CL) 0.3425 8.700
Cam lift (Sport):
Inlet 0.3622 9.200
Exhaust 0.3642 9.250
Standard tappet bore diameter 1.4567 to 1.4577 37.0 00 to 37.025
Standard tappet outside diameter 1.4557 to 1.4565 36.975 to 36.995
Tappet fit clearance 0.0002 to 0.0020 0.005 to 0.05 0
Shim thickness 0.1279; 0.1299; then
0.0039 steps to 0.1850

3.2b; 3.30; then
0.10 steps to 4.70

Auxiliary shaft inches mm
Diameter of bush bores in crankcase:
Front 1.6339 to 1.6350 41.500 to 41.530
Rear 1.5733 to 1.5745 39.962 to 39.992
Fitted bush internal diameter:
Front 1.5143 to 1.5151 38.464 to 38.484
Rear 1.4553 to 1.4561 36.964 to 36.984
Diameter of shaft journals:
Front 1.5115 to 1.5125 38.393 to 38.418
Rear 1.4525 to 1.4535 36.893 to 36.918
Bush fit There must always be an interference fit
Shaft/bush fit clearance (front and rear) 0.0018 to 0.0036 0.046 to 0.091
Lubrication system
Oil pump Four lobe rotor type
Pump drive Through auxiliary shaft
Oil pressure relief valve Incorporated in pu mp
Pump rotors endfloat 0.0018 to 0.0047 0.045 to 0.120
Outer rotor to body clearance 0.0006 to 0.002 2 0.016 to 0.055
Inner to outer rotor clearance 0.0010 to 0.00 39 0.025 to 0.100
Oil pressure at 212°F (100°C) 50 to 70 Ibf/in
2 (3.5 to 5 kgf/cm2)

Cooling system
Radiator fan thermal switch
Cuts in . 194° to 201°F (90° to 94°C)
Cuts out 185° to 192°F (85° to 89°C)
Engine coolant thermostat
Starts to open 176° to 183°F (80° to 84°C)
Fully open 205°F (96°C)
Impellor vanes to pump body fit clearance 0.0315 to 0.0512 in (0.8 to 1.3 mm)

Radiator cap relief pressure 11.4 Ibf/in
2 (0.8 kgf/cm2)

Fuel system
Weber 32 ICEV 16/150 carburettor (C, L and CL model s)
Venturi diameter 0.8465 in (21.5 mm)
Main jet . 0.0453 in (1.15 mm)

Page 10 of 34

FIAT 127 1980 2.G Workshop Manual Fiat 127 Internet Fan Club (http://fiat127.okruhy.cz) Fiat 127 - 1050
10/34
Lamps
Headlamps (C, L and CL)
Headlamps (Sport)

Page 11 of 34

FIAT 127 1980 2.G Workshop Manual Fiat 127 Internet Fan Club (http://fiat127.okruhy.cz) Fiat 127 - 1050
11/34
Ignition distributor clamp nut 11 1.5
Oil pump to c

Page 29 of 34

FIAT 127 1980 2.G Workshop Manual Fiat 127 Internet Fan Club (http://fiat127.okruhy.cz) Fiat 127 - 1050
29/34

78 Slacken the tensioner bolts to tension the belt

Fiat 127 Internet Fan Club (http://fiat127.okruhy.cz) Fiat 127 - 1050
29/34

78 Slacken the tensioner bolts to tension the belt
and retighten the bolts (photo).
79 Turn the engine over for two complete
revolutions to even out belt tension. Then again
slacken the tensioner bolts to let the tensioner
take up any slack and
retighten the bolts. Never
turn the engine backwards or rock the camshaft
when tensioning the belt, as slack could develop
in the belt and it might jump a tooth.
80 Refit and tension the alternator/water pump
V-belt. Refit the drivebelt cover.
Valve clearances - adjustment
81 Checking the valve clearances should be
done at the 6000 miles servicing, or whenever
the cylinder head has been removed and
refitted for any reason. It is important that the
clearances are set correctly, otherwise the
timing will be wrong and the engine
performance will be poor. If there is no
clearance at all, the valves and seats will soon
get burnt. Set the clearances with the engine
cold.
82 Remove the camshaft cover. The engine can
be turned over by either using a spanner on the
crankshaft pulley nut, or by jacking up a front
wheel, engaging top gear and using the wheel
to turn the engine.
83 Each tappet must be checked when its
operating cam is pointing upwards, 1800 away
from the tappet. Check the clearances in the
firing order, No. 1 cylinder first and then 3, 4
and 2. Do the exhaust of one cylinder and the
inlet of the one after, at the same time to
minimise the amount of engine turning. Counting
from the timing belt end, exhaust valves are
1-4-5-8, inlet valves 2-3-6-7.
84 Insert the feeler gauge for the appropriate
valve. See the Specifications for correct
settings. The feeler should slide in readily
between cam and shim, but with slight frictional
drag. Try one a size thicker and one a size
thinner. The thick one should not go in and the
thinner one should be too loose (photo).
85 If the clearance is wrong, measure the
clearance and write it down with the number of
the valve. When all the clearances have been
checked, it will be necessary to remove those
shims which are fitted where the clearances are
wrong, and renew them with different thickness
shims. If a clearance is too big, use a thicker
shim. If a clearance is too small use a thinner
shim. Calculate by simple subtraction. 86 To change a shim, turn the engine until the
relevant cam is pointing upwards, then turn the
tappet in its housing so that the slot in the rim is
accessible.
87 The manufacturer provides special tools for
depressing tappets (Nos. A60480 and A60443).
These make the job easier if they can be
borrowed, but it is possible to do the job without
them. The best way is to make up a tool from a
piece of steel plate shaped as shown in the
photograph. Alternatively use a screwdriver to
lever the tappet down and another on
e, on edge,
to hold the tappet down by positioning it
between the camshaft and the rim of the tappet;
then remove the lever. This is quite tricky and
needs some care to avoid any damage. If in any
doubt about doing this job it should be left to a
FIAT agent. As well as having the right tools he
will also have a stock of shims from which to
choose those required to correct wrong
clearances. It is expensive buying shims that are
not required (photo).
88 With the tappet held down, prise the shim out
with a thin screwdriver. The FIAT way is to lift
the shim using compressed air, which is
effective if an air line is available. The shims are
held in quite strongly by the oil film and they
must be lifted up square or they will jam.
Remove the shim with long-nosed pliers
(photos).
89 When new, shims have their thickness
marked in millimetres on their undersides. This
marking may wear off and then it will be
necessary to measure their thickness with a
micrometer. From the thickness of the shim and
the error in the clearance, calculate the size of
shim required to produce the correct clearance.
90 Insert the new shim, numbered side down
towards the tappet. Remove the tools used for
depressing the tappet and repeat the operation
until all clearances are correct.
91 Using clean engine oil lubricate all moving
and sliding parts in the camshaft/tappet
assembly. Fit a new gasket and refit the
camshaft cover together with the nine bolts and
washers. Tighten the bolts progressively (photo).

Engine - final assembly
92 Completing assembly of the 1049 cc engine
follows broadly the procedure for that of the
smaller engine which is dealt with in Chapter 1,
Section 56.
93 The manifold gasket is supplied in two parts
for the 1049 cc engine (photo). These serve

wheel bolt torque spark plugs replace wiper blades fuel tank capacity trailer TPMS reset