Fiat 850 Sedan 1968 Install guide

SECTION INDEX
GENERAL
ENGINE
Section
Page
1
3
2
SEDAN COUPE
ROADSTER· FAMILY
IDROCONVERT
9
'85
AIR CONDITIONING
WINDSHIELD WASHER
TIGHTENING REFERENCE
BRAKES
WHEELS AND TIRES
STEERING 17
============~ 157
I,Q
9
LUBRICATION
~
COOLING
FUEL SYSTEM
CLUTCH - TRANSMISSION
4
DIFFERENTIAL
FRONT SUSPENSION
,~
AND WHEELS
REAR
SUSPENSION
",
AND
WHEELS
.§
SHOCK ABSORBERS
MANUAL
MODEL
SHOP
BODY .
ELECTRICAL 110
~========~ 195
lu
FIAT" SERVICE DEPARTMENT" TURIN
MAINTENANCE
1~
TOOL EQUIPMENT
COUPE· ROADSTER
1~
FAMILY.IDROCONVERT

IMPORTANT
All the dimensions in metric units shown
in this publication are the official ones.
Dimensions are also given in British and
American units for prompt reference, and
they have been calculated to a degree of ap-
proximation according to the need for accu-
racy in individual measurements.

Section 1
GENERAL
INfORMATION
MAIN SPECIFICATIONS
PERFORMANCES
CAPACITIES
UNIT IDENTIFICATION DATA
SPARE PARTS
CAR KEYS
Page
:11
7
8
8
8

4 FIAT·850 PASSENGER CARS
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GENERAL: MAIN SPECIFICATIONS 5
GENERAL INFORMATION
Specifications, features and service procedures outlined in this publication are intended to
apply to the Sedan Version.
Differing parts, data and procedures of Coupe, Roadster, Station Wagon and Idroconvert
Versions, as referred to the Sedan, are described in Section 13.
Wear limit figures are given just for the serviceman's information and should not be taken as
absolute values.
MAIN SPECIFICATIONS
Identification Data.
Chassis type .
Engine type !•
Standard. version
• Super. version
lOOG
lOOG.OOO
lOOG.OO2
3rd, synchromeshed
4th, •
Reverse .
Hypoid final drive gear ratio
Steering.
1.409 to I
0.963 to I
3.615 to I
4.625 to I(8/37)
13 to I(2/26)
31' 6" (9.60 m)
Worm-and-seetor.
Gear ratio ..
Turning circle . .
Front Suspension.
Rear Suspension.
Independent wheel.
Coil springs, control arms, hydraulic shock absor-
bers, sway bar.
Rear wheel toe-in (full load) .039" to .118" (I to 3rom).
Independent wheel.
Transversal semi-elliptic spring, upper control arms,
hydraulic shock absorbers, sway bar.
Toe-in (full load). 079" to .157" (2 to 4rom)
Camber (full load):
- angle . 20 10'± IS'
- amount, at wheel rim
.472" to .512" (12 to 13 rom)
Caster. . . . . . . . . . . . gO±lo
40
42
.5,300 r .p.m.
.5,300 r.p.m.
8.0 to I
8.8 to I
rear
4-stroke, gasoline
4, in-line
2.559" (65 rom)
2.500" (63.5 rom)
.51.44 cu.in (843 em')
Engine.
Location .
Cycle ..
No. of cylinders
Bore .
Stroke . . . . .
Piston displacement .
Compression ratio:
-(I Standard l) version
-(I Super» version. .
Maximum horsepower (SAE):
- • Standard» version
- 4l Super t version. .
f 4l Standard. version . .
at
}. Super. version . . .
Maximum horsepower (DIN):
- • Standard. version 34
-•
Super. version. .37
I.
Standard. version .4,800 r .p.m.
at •
Super. version . . 5,000 r .p.m.
Taxable horsepower Otaly) II
Cooling ....... permanent circuit mixture
Clutch.
Brakes.
Single plate. dry.
Diaphragm-type pressure spring.
Transmission· Differential.
Drum diameter . . . . .
Master cylinder bore . .
Bore of wheel cylinders:
- front
-rear .
7.283" (185 rom)
3/4"
7/6"
3/4".
Rear drive.
Gear ratios:
1st, synchromeshed
2nd, t3.636 to I
2.055 to I
Wheels and Tires.
Disc wheels, size
Tire size .... 4.00-12" 5.50-12"

6 FIAT· 850 PASSENGER CARS
Tire pressure:
four people and luggage
five people and luggage
Front Rear
~ kg/em' _"_'_1 kg/em'
15.6 1.1 25.6 1.6
17.1 1.2 28.4 2
Payload, maximum , . . . .. 852 lbs (400 kg)
Gross weight, full load . , . ,2,359lbs(I,070kg)
Distribution of gross weight on axles:
front 904lbs (410 kg)
-
rear .. ........ 1,455 lbs (660 kg)
Electric System.
Performances.
Weights.
31%
17%
10%
6%
road in
(30 kmfh)
(55 km/h)
(85 kmfh)
75
mph (120 km/h)
78
mph (125 km/h)
Gradeability, under full load, with level
good condition and run-in engine:
first gear
second gear
third gear .
fourth gear .
Speed, maximum, under full load, with level road
in
good condition and run-in engine:
first gear 19 mph
second gear . . 34 mph
third gear ... 53 mph
fourth gear. abt:
-«Standard ~ version
- ( Super l) version. .
1,477 lbs (670 kg)
4-5 people
110 lbs (50 kg) luggage plus
Voltage .. ............ 12
Battery (ZQ-hr discharge rate), capacity 36 Amp. hrs
Generator FlAT type D90/12/16/3 C5 .230 Watts
Generator regulator FIAT type GN 2/12/16.
Starting
motor FIAT type E76-0,5/12 S Var. 9.
Curb weight (with water, oil,
fuel,
spare wheel, tool kit and
accessories)
Accomodation
984
661
2027 887
1146
3575 1425
~
I
1Il
~
=
~
~
~
=
~
•
9•
I
Fig. 2 - Leading dimensions of car (metric).
Overall height applies to an unloaded vehicle.

GENERAL: CAPACITIES
7
CAPACITIES
Fuel tank ..6.60
gals
7.93 gals 30
Radiator I engine and heating
system.
1.65 1.98 7.S
pints pints
Sump and filter (.) .5.72 6.87 3.25 2.90
Transmission and differential 3.70
4.44 2.10 1.90
Steering gear
0.211 0.254 0.12 0.11
Braking system .0.457 0.549 0.26 0.26
Front shock absorbers (each) 0.299 0.359 0.170 0.155
Rear shock absorbers (each)
0.264 0.3/7 0.150 0.135
Windshield washer reservoir
(') (') (')
UNIT
QUANTITY
I Imp. units U.S. units __ It __ ! __ k--,g::.-
FILL-IN
B3 octane gasoline (R. M.),
t: Standard It version
92 octane gasoline, min.
(R. M.), ,Super. version
Mixture of water and FIAT
Paraflu 11 fluid (50% by
volume) (')
FIAT oil (3)
FIAT W 9O/M oil (SAE 90 EP)
PIAT special t: blue label It fluid
FIAT S.A./. fluid
Water and FIAT D.P./I fluid
mixture (concentrated so-
I lution).
(-) The total capaClty of sump, pipings and crankshaft is 6.48 G.B. pts -7.80 U.S. pts (3.3 kg). The quantity shown in the table applies
to routine oil changes, which should be made every 6,000 miles (10,000 km) or siJ: months. Every 300 miles (500 kin), check oil level.
(I) The coolant has non--oxidizing, non-corrosive. non-foamy, non-scaling properties and will nOI freeze up 10 -31
eF
(-35
0C).
(I) Pure water .66 G.B. qts -.79 U.S. qts (0.75 kilos) plus .6 oz (17 gr) solution in summer and 1.20 oz (34 gr) solution in winter.
(') Use the following grcades of oil: .
TEMPERATURE
flAT UNlGRADE On. IFIAT MULTIGRADE On.
(supplement 11evel oils which fill MS sequence requirements)
Below +5
0F
(-IS° C), minimum VS 10 W(SAE 10 W)
20 W40
10 W30
VS 30 (SAE 30) II
VS 40 (SAE 40) \
VS 20 W(SAE 20 W)
Between 320F (O°C) and +5°F (ISoC), minimum
Above 32° FI Below 95°F (35°C). maximum
(OOC), minimum Above 950F (350C), maximum
WARNING· These FIAT oils are detergent, and oils of different grade or malce should not be used for toppmg up. If detergent
oils are being used for the first time on an engine which is not new, the system should be carefully drained and flushed.
Fig. 3.
Power plant (engine-clutch.
transmission and differential
aSlY)·

8
FIAT - 850 PASSENGER CARS
UNIT IDENTIFICATION DATA
Fig ....
location of unit iden-
tification
numbers.
A. Unit identification plate. -B. Chassis type (100G) and serial number .• C. EngIne
type (1006.000
for the «Standard)) version and 1006.002 for the « Super» version) and
serial number.
NOTE -Starting from car with parts serial
number 667161, plate "A" and stamping
"B" are located on partition wall between engine compartment and fuel tank.
SPARE PARTS
CAR KEYS
When placing orders for spare parts, state:
- car Model;
- engine serial number or serial number for
spare parts, according to whether parts for engine
or running gear are requested;
- nwnber of spare part or parts on order, as
given in spare parts catalogue.
Each new car is equipped with two sets of keys
to suit:
- ignition and starting switch;
- door locks.
A code number is stamped on key bow.
To have car key duplications made through the
cutting machine Ap. 5013. just specify the code
number of the key on order and relevant description.

Section 2
ENGINE
MAIN SPECIFICATIONS
TROUBLES AND CORRECTIONS
REMOVAL AND INSTALLATION
DISASSEMBLY
Page
11
13
23
24
2
ASSEMBLY 26
CYLINDER BLOCK AND CRANKCASE 29
PISTONS· CONNECTING RODS 35
CRANKSHAFT AND MAIN BEARINGS 45
CYLINDER HEAD· VALVES - VALVE
GUIDES· SPRINGS AND ROCKERS 53
VALVE MECHANISM 63
TIGHTENING REFERENCE 68
BENCH TEST 69