1.8 liter CVH engine — specifications

Designation	1.8 NS CVH 2V
Type	R2A
Cylinder diameter	80 mm
piston stroke	88 mm
Working volume	1769 cm3
Compression ratio	9,3
Compression pressure	1.2 - 1.4 MPa
Rated power	66 kW (90 HP) at 5250 rpm
Max Torque	147 Nm at 3000 rpm

The engine is gasoline, four-stroke, four-cylinder, in-line, vertical, liquid-cooled, has a camshaft in the cylinder head and is mounted longitudinally in front of the car.

Engine cylinder head

The cylinder head is made of light alloy. It has spherical chambers and valves inclined in two planes, forming a V-shaped system and actuated by camshaft cams located in the cylinder head, by means of hydraulic pushers and levers.

Main settings

Permissible flatness of the bottom surface of the cylinder head	0.15 mm
Maximum grinding depth of the bottom surface of the cylinder head	0.25 mm
Minimum depth of combustion chambers after grinding the bottom surface of the cylinder head	13.9 - 14.5 mm
Camshaft bearing bush bore diameters:
– nominal	45.721 - 45.796 mm
– repair	increased by 0.38 mm
Pusher socket hole diameters	22.25±0.015mm

Cylinder head gasket

Set by inscription "Thor" up (toward the cylinder head).

Valves

The valves are made of special steel, arranged in a V-shape and actuated from the camshaft through hydraulic tappets and valve levers.

Valve sizes (mm)

valve type	Inlet	High school graduation
Length	136,50 – 136,96	133,66 – 134,12
Plate diameter	38,90 – 39,10	33,91 – 34,11
Rod diameter:
- nominal	8,025 – 8,043	7,999 – 8,017
- repair 0.2	8,225 – 8,243	8,199 – 8,217
- repair 0.4	8,425 – 8,443	8,399 – 8,417
valve lift	9,535	9,535
Gap of the rod in the guide	0,020 – 0,069	0,046 – 0,089

Valve clearance: zero, hydraulic tappets are used.

Valve seats

The valve seats are inserted into the cylinder head.

Valve Face Angle	45°
Valve Face Width	1.75 - 2.32 mm
Seat top angle:
- inlet valve	30°
- exhaust valve	20°
Seat angle:
- inlet valve	65°
- exhaust valve	70°

Valve guides

The valve guides are made of cast iron and pressed into the cylinder head.

Guide hole diameters:

• nominal: 8.063 - 8.094 mm;
• repair +0.2: 8.263 - 8.294 mm;
• repair +0.4: 8.463 - 8.494 mm.

Valve springs

Single springs are used, the same for both intake and exhaust valves.

Free length: 45.4 - 47.2 mm.

Length with valve open: 27 mm.

Length with valve closed: 37.084 mm.

Valve levers

Forged steel valve levers are attached with a central bolt.

Pushers

The hydraulic tappets are made of cold forged steel and are cylindrical in shape.

Outside diameter:

• nominal: 22.25 mm;
• repair +0.25: 22.50 mm.

Engine block

The cylinder block is cast iron. The cylinders are made directly in the engine block.

Nominal cylinder diameters

Standard:
– group 1	79.940 – 79.950 mm
– group 2	79.950 – 79.960 mm
– group 3	79.960 - 79.970 mm
– group 4	79.970 - 79.980 mm
– group 5	79.980 - 79.990 mm
– group 6	79.990 – 80.000 mm
Enlarged:
– group A	80.000 – 80.010 mm
- group B	80.010 – 80.020 mm
- group C	80.020 – 80.030 mm

Repair diameters of cylinders: increased by 0.290 or 0.500 mm.

Crank mechanism

Crankshaft

The cast iron crankshaft is dynamically balanced and supported by five main bearings.

Diameters of main journals:
- nominal	53.980 – 54.000 mm
- repair-0.25	53.730 – 53.750 mm
- repair-0.50	53.480 – 53.500 mm
- repair-0.75	53.230 - 53.250 mm
Support bearing width:
– nominal:	28.825 - 28.875 mm
– repair	28.675 - 28.725 mm
Radial clearance in main bearings	0.028 - 0.067 mm
Axial clearance of the crankshaft	0.1 - 0.2 mm
Diameter of connecting rod journals:
- nominal	43.890 - 43.910 mm
- repair-0.25	43.640 - 43.660 mm
- repair-0.50	43.390 - 43.410 mm
- repair-0.75	43.140 - 43.160 mm
– repair-1.00	42.89 - 42.910 mm

Indigenous liners

Thin-walled liners are used.

The inner diameter of the liners after installation in the cylinder block:
- nominal	58.016 - 58.059 mm
- repair-0.25	57.776 - 57.809 mm
- repair-0.50	57.516 - 57.559 mm
- repair-0.75	57.266 - 57.309 mm

Connecting rods

The connecting rods are forged from steel and have an I-section.

Bottom head hole diameter	46.890 – 46.900 mm
Head hole diameter	20.622 - 20.634 mm
Radial clearance in connecting rod bearings	0.020 - 0.065 mm

Connecting rod bearings

Thin-walled liners are used.

The inner diameter of the liners after installation in the cylinder block:
- nominal	43.919 - 43.960 mm
- repair-0.25	43.669 - 43.710 mm
- repair-0.50	43.419 - 43.460 mm
- repair-0.75	43.169 - 43.210 mm
– repair-1.00	42.919 - 42.960 mm

Pistons

The pistons are die-cast light alloy and have a flat bottom with recesses for the valve discs.

Piston clearance in cylinder:
- nominal	0.02 - 0.04 mm
- repair	0.01 - 0.045 mm
Nominal piston diameters:
Standard:
– group 1	79.910 - 79.920 mm
– group 2	79.920 – 79.930 mm
– group 3	79.930 – 79.940 mm
– group 4	79.940 – 79.950 mm
– group 5	79.950 – 79.960 mm
– group 6	79.960 - 79.970 mm
Enlarged:
– group A	79.970 - 79.980 mm
- group B	79.980 - 79.990 mm
- group C	79.990 – 80.000 mm

Repair diameters of cylinders: increased by 0.290 or 0.500 mm.

Piston rings

Each piston has rings: two sealing and one oil scraper.

O-rings must face the inscription "Thor" towards the cylinder head.

Ring lock gap (placed in a cylinder):

• sealing: 0.30 - 0.50 mm;
• oil scraper: 0.40 - 1.40 mm.

The position of the ring locks on the piston: the cuts of the sealing rings must be placed evenly around the perimeter of the piston, and the components of the oil scraper ring must have cuts located every 120°.

Flywheel

The flywheel is fixed to the crankshaft flange with 6 bolts.

The toothed rim is pressed on at a temperature of 260°–280°C.

Gas distribution system

The camshaft is located in the cylinder head and is driven by a toothed belt from the crankshaft.

Valve timing

OZD	24°before TDC
ZZD	116°after BDC
OZW	110°before BDC
ZZW	18°after TDC
OZD and ZZD - opening and closing of the intake valve, respectively
OZW and ZZW - opening and closing of the exhaust valve, respectively

The valve timing is given with a valve lift of 1 mm and fixed levers of all valves, except for the valve lever, the phases of which are measured.

Camshaft

Neck diameter	45.7625 - 45.7375 mm
Axial clearance	0.02 - 0.15 mm
Thrust plate thickness	4.99 - 5.01 mm
Cam lift (inlet and outlet)	5.79 mm
Jaw height (inlet and outlet)	38.305 mm

The camshaft is made of cast iron and is located in five bearings in the cylinder head, fixed longitudinally with a plate screwed with two bolts to the cylinder head and driven by a toothed belt.

Toothed belt

Brand	Motorcraft
Tension:
- new belt	350 - 450 N
- used belt (after 10 minutes of work)	250 N
Tension measured with a Ford tool:
- new belt	10 - 11 units
- used belt	4 - 6 units
Tension adjustment	by means of a mechanical roller tensioner

Lubrication system

Pressure lubrication is provided by an oil pump located at the front end of the crankshaft.

The gear oil pump contains a pressure relief valve.

The full flow oil filter is located on the right side of the cylinder block.

Replacement frequency

Oil pump
Oil pressure (at 80°C):
– at 750 rpm	0.10 MPa
– at 2000 rpm	0.28 MPa
bypass valve opening pressure	0.4 MPa
Pressure of ignition of a control bulb of pressure of oil	below 30 - 50 kPa
Axial clearance between pump gears and cover	0.014 - 0.100 mm
Clearance of the outer gear in the pump housing	0.06 - 0.19 mm
Oil filter
Brand and type	Motorcraft Super EFL 134
Replacement frequency	after 10,000 km of vehicle run, then every 20,000 km or once a year
Engine oil
Quantity (with filter)	3.5 dm3
Type	multigrade engine oil according to API SG/CD viscosity SAE 10W 30, 15W 50 or 20W 50
after 10,000 km of vehicle run, then every 20,000 km or once a year

Cooling system

The closed antifreeze cooling circuit contains a radiator, an expansion tank, a coolant pump, a thermostat and a fan driven by an electric motor activated by a thermal switch located in the radiator.

Coolant pump

The centrifugal coolant pump is driven by the timing belt.

Radiator

The radiator has tanks made of artificial material and a tubular aluminum heat exchanger.

Expansion tank

The expansion tank is made of artificial material.

The cooling system is filled with liquid through the filler hole in the expansion tank.

Opening pressure of the overpressure valve in the plug of the expansion tank: 120 kPa.

Thermostat

Wax thermostat. Opening start temperature: 85°–89°С. Full opening temperature: 100°C.

Fan

The fan is driven by an electric motor switched on by a thermal switch located in the radiator.

Vehicles equipped with automatic transmission have two electric fans.

Fan thermal switch

The fan thermal switch is located on the radiator tank.

Switch-on temperature: 99°±2°C. Switch-off temperature: 94°±2°C.

Vehicles equipped with an automatic transmission have a two-stage thermal switch where each stage controls one fan.

Switch-on temperature:

• 1st stage: 100°±3°С;
• 2nd stage: 110°±3°C.

Shutdown temperature:

• 1st stage: 96°±3°C;
• 2nd stage: 106°±3°C.

Coolant

Quantity: 9.5 dm³.

Type: special antifreeze mixture SSM 97 B 9103 A (40%) and distilled water (60%) form protection up to -30°С.

Replacement frequency: every 60,000 km or every two years.

Fuel system

The fuel system of the 1.8 CVH 2V engine includes a mechanical fuel pump and a Pierburg 2E3 two-chamber carburetor, with an automatic starting device and an accelerator pump.

There is a pressure accumulator reservoir in the fuel line between the fuel pump and the carburetor, which reduces fuel pressure fluctuations.

Pierburg 2E3 carburetor adjustment data

Main fuel jet (1st / 2nd chamber):
- vehicles with manual transmission	100/ 105
- vehicles with automatic transmission	97,5/ 105
Float installation	27.5mm
"Fast" idle speed	2000±100 rpm
idle speed:
- vehicles with manual transmission	850±50 rpm
- vehicles with automatic transmission	800±50 rpm
CO content	1 ± 0,25 %
Fuel filter
Brand and type	Motorcraft EFG 21
Air filter
Brand and type	Motorcraft EFA 377

Ignition system

The ignition system is accumulator, microprocessor, type ESC, includes:

• position and engine speed sensor;
• distributor;
• coolant temperature sensor;
• vacuum sensor in the intake system;
• incoming air temperature sensor;
• electronic ignition control module Hybrid ESC.

Ignition coil
Brand and type	Bosch 0 221 122 031, Femsa or Polmot
Primary resistance	0.72 - 0.88 ohm
Secondary winding resistance	4.5 - 7 kOhm
Distributor
Brand	Motorcraft
Direction of rotation (looking from the front)	clockwise
Ignition order (cylinder No. 1 from the drive side of the gas distribution system)	1–3–4–2
Ignition advance angle (engine idling, warm, vacuum line connected to carburetor)	20°before TDC
Spark plug
Brand and type	Motorcraft AGRF 22C1 (factory installed) or Motorcraft AGPR 22C1 (recommended during vehicle operation)
Gap between electrodes	1 mm
Electronic ignition control module
Brand	Motorcraft 87 BB-12A297-EA
Color designation	yellow-yellow-black
Type	Hybrid ESC
Position and speed sensor
Distance of the front of the sensor from the top of the rotor teeth	1 mm

Tightening torques

Cylinder head bolts:
– 1st stage	40 – 60 Nm
– 2nd stage	tighten by 180°
– 3rd stage	40 – 60 Nm
– 4th stage	tighten by 90°
– 5th stage	tighten by 90°
cylinder head cover	8 – 10 Nm
Casing of the gas distribution system:
- hairpins	9 – 10 Nm
- bolts	6 Nm
- nuts	8 – 10 Nm
Oil pan:
– M6 bolts	8 - 11.5 Nm
- M8 bolts	20 – 30 Nm
Oil drain plug in the oil pan	20 – 30 Nm
Fastening of the oil pump to the block of cylinders	11 – 16 Nm
Oil pump cover	8 - 12.4 Nm
Main bearing cap bolts	90 - 108 Nm
Connecting rod cap bolts	26 - 34 Nm
flywheel bolts	73 - 91 Nm
Vibration damper, crankshaft	110 – 130 Nm
camshaft pulley	95 – 115 Nm
Camshaft Thrust Plate	9 – 13 Nm
Toothed belt tensioner	23 – 30 Nm
coolant pump	7 – 10 Nm
An exhaust manifold	21 - 26.5 Nm
Intake manifold	16 – 20 Nm
Carburetor stand	20 – 24 Nm
Carburetor to stand	8 – 10 Nm
thermostat housing	8 - 11.5 Nm
Spark plug	18 - 33 Nm
Position and engine speed sensor	4 – 7 Nm