Engine displacement, cm3 - 1998
Cylinder diameter, mm - 82.7
Piston stroke, mm - 93
Compression ratio - 9.8-1
Maximum power:
- CEE (kW at min-1) - 83.5 at 5400
- DIN (hp at min-1) — 115 at 5400
Maximum torque:
- CEE (Nm at min-1) — 168 at 4250
- DIN (kg-m at min-1) — 175 at 4250
Cylinder head
The cylinder head, including the combustion chambers, is made of aluminum alloy. The valve seats and guides are pressed into the cylinder head. The camshaft bearings are bored directly into the cylinder head.
The head is centered on the cylinder block by two guide bushings.
Nominal height of the cylinder head between mating surfaces, mm - 169.5±0.2
Cylinder head regrinding is not provided
Deviation from the flatness of the mating surface, mm - 0.05
Cylinder head gasket
The cylinder head gasket is made of synthetic material that does not contain asbestos.
Brand – Curty
Installation - with marks «TOP» to the cylinder head
Pushers
Steel cylindrical mechanical pushers move in sockets made in the cylinder head. In the upper part of the pushers there are sockets for installing adjusting washers.
Outer diameter, mm - 34.96-34.99
Adjusting washers
Adjustment of valve clearances is carried out by installing an adjusting washer between the pusher and the camshaft cam.
The shims are available in thicknesses from 2.90 to 3.70 mm at 0.05 mm intervals.
Installation direction - the inscription on the washer should be adjacent to the pusher
Valves
Two valves per cylinder are located parallel to each other and perpendicular to the cylinder head gasket. The camshaft cams act on the valves through pushers with adjusting washers
Rod diameter, mm - 8
Diameter of plate, mm
- inlet valve - 40
- exhaust valve - 32.5
Working edge angle,°— 90
Clearances in the valve drive mechanism on a cold engine, mm
- intake valve - 0.20
- exhaust valve - 0.40
Valve springs
The intake and exhaust valve springs are identical
- Wire diameter, mm - 4.2±0.03
- Inner diameter, mm - 21.6±0.02
- Free height, mm - 47.66
- Height under load 31 N, mm - 40.25
- Height under load 76 N, mm - 29.95
- Spring length with fully compressed coils, mm - 21.8
Valve guides
The valve guides are made of brass and pressed into the cylinder head.
Inner diameter, mm - 8
Outer diameter, mm:
- without a mark - 13
- with two marks - 13.25
Diameter of the socket in the cylinder head, mm
- without mark 12.90
- with two marks 13.15
Protrusion of the bushing in relation to the lower mating surface of the cylinder head, mm - 43±0.2
Valve seats
Valve seats are pressed into the cylinder head
Working edge width, mm — 1.7±0.2
Working edge angle,°— 90
Outer diameter, mm:
- intake valves - 41
- exhaust valves - 33.6
The engines use cylinder blocks made from cast iron with cylinder liners machined directly into the cylinder block material.
Cylinder diameters are divided into three classes, with the cylinder class being marked by a 5mm diameter drill hole on the exhaust manifold side of the cylinder block face.
| Distance to the drilled hole in relation to the mating surface of the cylinder head, mm | Cylinder diameter, mm |
| 18 | 82.70-82.71 |
| 24 | 82,71-82,72 |
| 30 | 82,72-82.73 |
Moving parts of the engine
Crankshaft
The crankshaft has 4 counterweights and is supported by 5 main bearings
Axial play, mm - 0.070-0.230
Radial clearance, mm - 0.036-0.071
Diameter of crankshaft journals, mm:
- nominal - 54.795±0.01
- repair — 54.545±0.01
Diameter of crankshaft connecting rod journals, mm:
- nominal - 48 (+0,02/ -000)
- repair — 47.75 (+0,02/ -000)
Crankshaft main bearing shells The crankshaft main bearing shells, installed on the cylinder block side, have grooves; and liners without grooves are on the main bearing caps. Thrust half rings are installed on the main central bearing.
Thickness of the thrust half-ring, mm - 2.30-2.45 in increments of 0.05 mm
Installation direction: working side to crankshaft
Connecting rods
I-section steel connecting rods with a lower split head.
Distance between axles, mm — 133
Thickness, mm - 25
Lateral play of the lower head of the connecting rod, mm - 0.22-0.40
| Mark on the piston head | Piston diameter*, mm |
| A or 1 | 82,665 - 82.675 |
| B or 2 | 82,675 - 82.685 |
| C or 3 | 82.685 - 82.695 |
*Piston diameter, measured at a distance of 51 mm from the piston crown
Pistons
The pistons are made of aluminum alloy. Three piston rings are installed on each piston. Pistons have three size groups.
Arrow installation position
stamped on the bottom should be directed towards the gas distribution mechanism drive.
Gap between piston and cylinder, mm - 0.035-0.065
Piston pins
The piston pins are made of case hardened steel, floating type and secured in the piston by two retaining rings
Piston rings
Each piston has three piston rings.
Installation - locks at an angle of 120°and a mark «TOP» up
Piston ring thickness, mm:
- upper compression ring - 1.5
- second compression ring - 1.75
- oil scraper ring - 3
Flywheel
The flywheel is made of cast iron and has one gear for starting the engine and a second for the crankshaft position sensor, which transmits a signal to the engine control unit.
The flywheel ring gear consists of 60 identical teeth of a certain size, located at an equal specified interval. Two teeth are missing, thereby forming an absolute position mark located at an azimuth of 84° (or 14 teeth around the circumference) to the TDC position of the pistons of the 1st and 4th cylinders. That is, in fact the crown has 58 teeth.
Gas distribution mechanism
The gas distribution mechanism consists of a camshaft driven by a toothed belt and acting on the pushers with cams. The valves are actuated directly by pushers.
Valve timing
- Intake valve opening delay to TDC,°— 5
- Intake valve closing delay after BDC,°— 43
- Exhaust valve opening advance to BDC,°— 52
- Exhaust valve closing advance after TDC,°— 1
Camshaft
The camshaft installed in the cylinder head rests on 5 support bearings. The camshaft cams operate the valves via pushrods with shims.
Axial play, mm - 0.048-0.133
Toothed belt
A synthetic timing belt drives the camshaft and, on F3R 728 engines, the intermediate shaft.
Belt tension - manual with eccentric roller
Checking tension after installing a new belt - 29 SEEM units
Minimum operating belt tension: 27 SEEM units
The frequency of replacing the timing belt is every 120,000 km of vehicle mileage or every 5 years
Lubrication
The F3R 768 engine is lubricated under pressure by a pump driven by the crankshaft. On the F3R 728 engine, the pump is driven by an intermediate shaft driven by a toothed belt. A replaceable oil filter is used to clean engine oil.
Additional sprayers are used to lubricate and cool the pistons.
Oil pump
Engine F3R 728
On the F3R 728 engine, the pump is driven by an intermediate shaft driven by a toothed belt.
Engine F3R 768
The rotary oil pump is equipped with a pressure reducing valve and is driven directly from the crankshaft. Gap between the pump gear and the housing, mm - 0.100-0.240
Axial play of gear/cover, mm — 0.020-0.085
Minimum pressure created by the pump at an engine oil temperature of 80°C, bar:
- in idle mode - 1.2
- at a rotation speed of 3000 min-1 - 3.5
Intermediate shaft (F3R 728 engine)
The intermediate shaft rests on two rings pressed into the cylinder block and is driven by a toothed belt.
Axial play, mm - 0.07-0.15
Radial clearance, mm - 0.04-0.11
Inner diameter of rings, mm:
- pulley side - 40.5
- on the cylinder block side - 39.5
Ring width, mm:
- from the pulley side - 19
- on the cylinder block side - 12.5
Oil pressure sensor
The oil pressure sensor is screwed into the cylinder block near the oil filter.
Pressure at which contacts close, bar - 0.6±0.1
Engine oil level/temperature sensor
This sensor is screwed into the cylinder block under the oil filter. and consists of a high resistivity coil that has different resistance at different oil temperatures. Depending on the resistance of the spiral, the voltage drop across the contacts of the sensor connector changes, which is recorded by a level indicator located in the instrument cluster. When the crankshaft rotates, the engine oil pressure increases and the contact sensor opens the warning lamp circuit, while the electronic housing is also blocked and the oil level sensor is turned off.
Resistance, Ohm:
- between contacts A and B1 (oil level) — 7-15
- between contacts A and B2 (oil temperature) — 40-2000
Oil filter
A cartridge type replacement oil filter cleans the engine oil in the main line and is located at the front of the cylinder block.
Brand and type - Purflux LS 571
Replacement frequency: every time you change the engine oil
Lubrication system
Capacity (with filter replacement), l - 5.5
Engine oil - SAE 10W30,10W40,10W50,15W40 or 15W50 in accordance with ACEA A2-96/AZ-96 or CCMCG4, G5.
Replacement frequency: every 10,000 km of vehicle mileage or once a year.
Cooling system
The cooling system is a closed liquid type, using a mixture of antifreeze and water as the working fluid, and includes a water pump, an electric radiator fan controlled by a temperature sensor, an aluminum radiator, an expansion tank, a thermostat and a heater radiator (version without air conditioning). On vehicles with air conditioning systems, two-level electrically driven fans are installed.
Radiator
The radiator is made of aluminum alloy
Expansion tank
The expansion tank is installed in the engine compartment near the left front wheel. Since the coolant expands when heated, its level in the expansion tank increases.
Opening values of the safety valves of the expansion tank plug, bar:
- brown plastic cover - 1.2
- blue plastic cover - 1.6
Electrically driven fan
The electrically driven fan is located behind the radiator and is activated by a temperature sensor that is sensitive to the temperature of the coolant.
Brand: Behr
Resistance, Ohm - 0.5
Thermal sensor
The temperature sensor is installed in the smaller left part of the radiator
Thermostat
A thermostat with an expanding wax capsule is installed on the left side of the cylinder head.
Starting temperature,°C - 89
Full opening temperature,°C – 99
Valve stroke, mm - 9
Water pump
The vane-type centrifugal water pump mounted on the right side of the cylinder block is driven from the crankshaft pulley by a multi-ribbed belt
Water pump drive belt
A typical multi-ribbed belt is driven from the crankshaft pulley and drives the alternator, power steering pump and air conditioning compressor.
Belt tension
| Tension value (US - SEEM unit) | Without air conditioning system (F2) | With air conditioning system (F1) |
| Installation | 107±3 US | 109±3 US |
| Minimum Acceptable | 62 US | 62 US |
Coolant temperature sensor
The coolant temperature sensor is installed in the thermostat housing and changes its resistance depending on the temperature. The sensor also turns on the engine overheat warning lamp located in the instrument cluster.
Resistance between pin 1 and «mass», Ohm - 60-1250
Temperature at which the engine overheating control switch turns on,°C - 115
Coolant
Coolant quantity, l — 7
Coolant composition - GLACEOL, RX type D
Coolant freezing temperature, C°
- for countries with warm and temperate climates - -25
- for countries with cold climates - -37
Replacement frequency: every 120,000 km of vehicle mileage or every 4 years
Fuel system
The fuel system consists of a fuel tank with an electric fuel pump immersed in it, as well as a filter. pressure regulator and four nozzles.
The fuel vapor recovery system accumulates fuel vapor in a canister of activated carbon.
Power system type - Siemens Fenix 5
Minimum octane number of fuel - 95
Fuel tank
The plastic fuel tank is located in front of the rear axle of the car.
Fuel tank cap - sealed type
Capacity - 80 l
Fuel - unleaded with a minimum octane rating of RON 95 or 98 from UTAC
Fuel level sensor
The fuel level sensor is mounted on the top of the fuel tank.
Fuel level sensor values
| Indication in the instrument cluster | Float height, mm | Resistance between pins 1 and 5. Ohm |
| 4/4 | 186 | 30 ±3 |
| 3/4 | 140 | 100 ±8 |
| 1/2 | 93,5 | 223,5 ±10 |
| 1/4 | 46,5 | 331 ±10 |
| Mini | 28 | About 385 |
Activated carbon canister and canister solenoid valve
The activated carbon canister is located in the right front part of the engine compartment behind the bumper. An electromagnetic valve mounted on the right side of the rear of the engine compartment under certain conditions opens the supply of fuel vapor to the cylinders of a running engine.
Solenoid valve supply voltage, V - 12
Solenoid valve brand: Delco Remy 199
Solenoid valve resistance, Ohm - 35±3
Fuel pump
The electric fuel pump is installed inside the fuel tank and is controlled by the engine control unit.
Brand: Narval
Productivity at a voltage of 12 V and a created pressure of 3 bar - 1.3 l/min or 80 l/h
Safety valve opening pressure, bar - 4.5-7.5
Fuel filter
The fuel filter is fixed in front of the fuel tank under the bottom of the car
The installation position of the boom on the filter housing must coincide with the direction of fuel flow.
Replacement frequency: every 60,000 km of vehicle mileage
Pressure regulator
A mechanical diaphragm-type fuel pressure regulator is located at the inlet of the fuel line and regulates the fuel pressure depending on the vacuum in the intake manifold.
Type - BOSCH 0 280 160 515 or WEBER RPM 39
Adjustable pressure range, bar:
- without vacuum - 3.0±0.2
- at vacuum up to 500 mbar - 2.5±0.2
Electromagnetic fuel injectors
Four electromagnetic injectors are mounted on the fuel line.
Type - Siemens Deka 867 867
Supply voltage, V - 12
Resistance, Ohm - 14.5±0.5
Air supply system
Air filter
The air filter uses a replaceable dry paper filter element.
Replacement frequency: every 30,000 km of vehicle mileage
Throttle assembly
The single throttle body is made of aluminum alloy and is mounted on the intake manifold.
Brand and type - Magneti Marelli 871-215
Idle speed control
The idle speed regulator is installed in the bypass channel of the throttle assembly.
Brand and type - Hitachi AESP 207-17
Resistance, Ohm — 9.6±1