Main settings
| Engine | 2.0 DOHC | 2.0 DOHC | 2.0 DOHC | 2.0 DOHC |
| engine's type | N8B | N8D | N9B | N9D |
| cylinder diameter, (mm) | 86,00 | 86,00 | 86,00 | 86,00 |
| piston stroke, (mm) | 86,00 | 86,00 | 86,00 | 86,00 |
| Volume, (see³) | 1998 | 1998 | 1998 | 1998 |
| Compression ratio | 10,3 | 10,3 | 10,3 | 10,3 |
| compression pressure, (MPa) | 1,1 – 1,3 | 1,1 – 1,3 | 1,1 – 1,3 | 1,1 – 1,3 |
| Rated power: | ||||
| – kW at rpm | 77 at 5600 | 80 at 5600 | 92 at 5500 | 88 at 5500 |
| – HP at rpm | 105 at 5600 | 109 at 5600 | 125 at 5500 | 120 at 5500 |
| maximum torque, (Nm at rpm) | 168 at 3000 | 174 at 3000 | 168 at 3000 | 171 at 2500 |
Cylinder head
The head is made of a special aluminum alloy and has steel valve seat inserts.
Regrinding of the lower plane of the cylinder head is not provided.
| Designation | 20 |
| Camshaft bearing bore diameters | 26.000 – 26.030 mm |
Cylinder head gasket
Brand: Reinz.
Valve guides
The valve guides are made of cast iron and are pressed into the cylinder head at an angle of 20°.
Nominal diameter: 7.063–7.094 mm.
Valves
The valves are installed in the cylinder head and are inclined at an angle of 20°to the cylinder axis and are actuated by the camshaft cams via hydraulic tappets. The working valve clearance is adjusted automatically.
Valve sizes
| Inlet valve: | |
| - valve length | 108.24 - 108.70 mm |
| - plate diameter | 42.50 - 42.70 mm |
| – rod diameter: | |
| nominal | 7.025 - 7.043 mm |
| repair size +0.2 | 7.225 - 7.243 mm |
| repair size +0.4 | 7.425 - 7.443 mm |
| repair size +0.6 | 7.625 - 7.643 mm |
| repair size +0.8 | 7.825 - 7.843 mm |
| – rod clearance in the guide | 0.020 - 0.069 mm |
| - angle of the working chamfer | 90° |
| Exhaust valve: | |
| Valve length | 108.71 - 109.17 mm |
| - plate diameter | 37.90 - 38.10 mm |
| – rod diameter | |
| nominal | 6.999 - 7.017 mm |
| repair size +0.2 | 7.199 - 7.217mm |
| repair size +0.4 | 7.399 - 7.417 mm |
| repair size +0.6 | 7.599 - 7.617 mm |
| repair size +0.8 | 7.799 - 7.817 mm |
| – rod clearance in the guide | 0.046 - 0.095 mm |
| - angle of the working chamfer | 90° |
Valve springs
There are two springs per valve.
| Inlet valve springs: | |
| – spring diameter | 24.00 mm |
| – spring wire diameter | 4.5mm |
| - number of turns | 6,1 |
| – free length | 46.80 mm |
| Exhaust valve springs: | |
| – spring diameter | 17.5mm |
| – spring wire diameter | 2.5mm |
| - number of turns | 8,0 |
| – free length | 48.20 mm |
Engine block
The engine block is cast iron. The cylinders are made directly in the cylinder block.
| Designation | 20 |
| Support bearing width | 27.17 - 27.22 mm |
| Internal diameters of main bearings (measured vertically): | |
| - nominal | 55.001 - 55.038 mm |
| - repair size -0.05 | 54.951 - 54.988 mm |
| - repair size -0.25 | 54.751 - 54.788 mm |
| – repair size -0.50 | 54.501 - 54.538 mm |
| – repair size -0.75 | 54.251 - 54.288 mm |
| Bore diameters of the main bearing seats in the cylinder block: | |
| - nominal size | 59.287 - 59.300 mm |
| – repair size +0.4 | 59.687 - 59.700 mm |
| Cylinder diameters: | |
| – nominal standard diameters: | |
| group 1 | 86.000 – 86.100 mm |
| group 2 | 86.100 – 86.200 mm |
| – 1 repair size +0.15: | |
| group A | 86.150 - 86.160 mm |
| group B | 86.160 - 86.170 mm |
| – 2 repair size +0.50 | 86.500 - 86.510 mm |
Crank mechanism
Crankshaft
The steel crankshaft is supported by five bearings.
| Axial play | 0.09 - 0.30 mm |
| Diameters of main journals: | |
| - nominal size (yellow label) | 54.980 - 54.990 mm |
| - nominal size (red label) | 54.990 – 55.000 mm |
| - repair size -0.25 (green label) | 54.730 - 54.750 mm |
| Clearance in main bearings | 0.011 - 0.048 mm |
The measurement is carried out using Plastigage measuring rods. | |
| Connecting rod diameters: | |
| - nominal size | 50, 890 - 50.910 mm |
| - repair size -0.25 (green label) | 50.640 - 50.660 mm |
| Thickness of thrust half rings: | |
| - nominal size | 2.301 - 2.351 mm |
| - repair size | 2.491 - 2.541 mm |
Flywheel
The flywheel is fixed to the crankshaft flange with six bolts located at different distances from one another.
Connecting rods
The connecting rods are forged from steel and have an I-profile in cross section. At the bottom of the connecting rod there is an oil sprayer for lubricating and cooling the pistons. The piston pin is pressed into the connecting rod head.
| Connecting rod head bore diameter | 20.589 - 20.609 mm |
| Pin tension in the connecting rod head | 0.018 - 0.039 mm |
| Heating temperature of the connecting rod head during pin installation | 250 - 300°С |
| Connecting rod bore diameter | 53.890 - 53.910 mm |
| The inner diameters of the holes of the connecting rod bearings: | |
| - nominal size | 55.001 - 55.038 mm |
| - repair size -0.05 | 54.951 - 54.988 mm |
| - repair size -0.25 | 54.751 - 54.788 mm |
| – repair size -0.50 | 54.501 - 54.538 mm |
| – repair size -0.75 | 54.251 - 54.288 mm |
| Clearance in connecting rod bearings | 0.006 - 0.060 mm |
The measurement is carried out using Plastigage measuring rods. | |
| Permissible non-perpendicularity of the axis of the holes relative to the axis of the connecting rod: | |
| - head hole | 0.10 mm |
| - base hole | 0.15 mm |
Pistons
The pistons are made of light alloy, without grooves on the conductive part, with a cast invar ring to limit thermal dimensional changes. In the upper part there are three grooves for piston rings. The axis of the piston pin hole is offset relative to the piston axis. Pistons are supplied in kits with pins and connecting rods.
Installation Method: The arrow on the bottom of the piston must point towards the front of the engine (towards the drive of the gas distribution system).
Piston dimensions
| Engine | 2.0 dm³ |
| Nominal standard diameters: | |
| – group 1 | 85.970 – 85.980 mm |
| – group 2 | 85.980 – 85.990 mm |
| Repair dimensions: | |
| – standard | 85.980 – 86.000 mm |
| – with a tolerance of 0.15 | 86.130 - 86.150 mm |
| – with a tolerance of 0.50 | 86.470 - 86.490 mm |
| Clearance of new pistons in cylinders | 0.020 - 0.040 mm |
Piston pins
Pins made of steel, heat treated, pressed into the connecting rod heads (hot mounting at head temperature 250–300°С) and rotate in the piston hubs.
| Length | 63.40 mm |
| Diameter: | |
| - marking in white | 20.622 - 20.625 mm |
| - marking in red | 20.625 - 20.628 mm |
| - marked in blue | 20.628 - 20.631 mm |
| - marked in yellow | 20.631 - 20.634 mm |
| Clearance in piston hubs | 0.008 - 0.014 mm |
| Tension in the connecting rod head | 0.018 - 0.039 mm |
Piston rings
Each piston has three rings: two sealing (upper square section, middle conical section) and one oil scraper.
| O-ring lock clearance (installed in the cylinder): | |
| - top | 0.30 - 0.60 mm |
| - average | 0.50 - 0.80 mm |
| Clearance of the lock of an oil scraper ring | 0.40 - 1.50 mm |
| Location of ring locks: | |
| – sealing | by 150° (in opposite directions) in relation to the oil scraper lock |
| – oil scraper | the lock of the expanding spring is installed in accordance with the direction of the arrow on the bottom of the piston, the locks of the upper and lower plates are installed 25 mm to the right and left of the direction of the arrow |
Gas distribution system
The camshafts are located in the cylinder head, drive the valves directly through the tappets and are driven by a single row chain.
Distribution phases
Engine | N8B | N9B |
OZD | 13°before TDC | 13°before TDC |
ZZD | 39°after BDC | 51°after BDC |
OZW | 43°before BDC | 43°before BDC |
ZZW | 13°after TDC | 13°after TDC |
OZD and ZZD - opening and closing of the intake valve, respectively.
OZW and ZZW - opening and closing of the exhaust valve, respectively.
TDC and BDC are top and bottom dead center respectively.
Drive chain
Drive chain - single row, roller size 3/8 inch.
The chain is tensioned by a hydraulic tensioner.
Camshafts
The camshafts rotate in five bearings.
| Camshaft bearing diameters | 25.960 – 25.980 mm |
| Camshaft end play | 0.020 - 0.260 mm |
| Cam lift: | |
| – inlet, N8B engine | 10.5mm |
| – intake, N9B engine | 11.1mm |
| - graduation | 10.9 mm |
Lubrication system
Pressurized lubrication is provided by a crankshaft chain-driven gear oil pump housing a bypass valve.
| Minimum oil pressure (at 80°C): | |
| – at 750 rpm | 0.16 MPa |
| – at 2000 rpm | 0.37 - 0.46 MPa |
| bypass valve opening pressure (at 1000 rpm) | 0.37 - 0.46 MPa |
| Pressure of ignition of a control bulb of pressure of oil | 0.03 - 0.06 MPa |
A low engine oil level is signaled by a warning light on the instrument cluster.
| The volume of engine oil in the engine, dm³: | |
| - with filter replacement | 4,50 |
| – without filter replacement | 4,00 |
Oil pump
The internal gear oil pump is chain driven from the crankshaft and is located at the front of the engine.
| Gap of a gear with an internal arrangement of teeth relative to the housing | 0.150 - 0.301 mm |
| Gap between gear teeth | 0.05 - 0.20 mm |
| Axial gear clearance | 0.039 - 0.104 mm |
Oil filter
Full flow oil filter with replaceable filter element.
Brand: Motorcraft.
Cooling system
The closed antifreeze cooling circuit contains a radiator, an expansion tank, a coolant pump, a thermostat and a fan.
Radiator and expansion tank
The crossflow radiator has tanks made of artificial material.
The expansion tank is made of transparent material and is marked with maximum and minimum coolant levels.
Opening pressure of the overpressure valve in the plug of the expansion tank: 120 - 140 kPa.
Coolant pump
The centrifugal coolant pump, located on the front wall of the cylinder block, is driven by a V-belt together with the generator.
Fan
The fan is electrically driven by a temperature sensor located in the radiator drain plug.
Thermostat
Opening start temperature: 85–89°C.
Full opening temperature: 102±3°C.
Coolant
| Quantity: | |
| – N8B engine | 7.9 dm³ |
| – N9B engine | 7.3 dm³ |
| Type | mixture of special antifreeze liquid Ford SSM 97 B 9103 A and distilled water (by 50%) form protection up to -30°С |
| Replacement frequency | every 60,000 km or every two years |
Tightening torques
| Main bearing cap bolts | 88 - 102 Nm |
| Camshaft bearing cap bolts | 22 - 26 Nm |
| Connecting rod bolts: | |
| – 1st stage | 6 – 8 Nm |
| – 2nd stage | 15 – 17 Nm |
| – 3rd stage | tighten by 90° |
| Vibration damper: | |
| – 1st stage | 45 - 58 Nm |
| – 2nd stage | tighten by 90° |
| crankshaft pulley bolt | 110 – 130 Nm |
| Camshaft sprocket bolt | 55 - 63 Nm |
| flywheel bolts | 82 – 90 Nm |
| Oil pump mounting bolts | 8.5 - 11.5 Nm |
| Oil pan bolts | 8 – 11 Nm |
| Oil drain plug in the oil pan | 21 – 28 Nm |
| Oil pump chain tensioner bolt | 10 – 13 Nm |
| Oil pressure sensor | 18 - 22 Nm |
| Bolt of fastening of the water pump | 21 – 28 Nm |
| Bolt of fastening of a pulley of the water pump | 21 – 28 Nm |
| Cylinder head bolts: | |
| – 1st stage | 20 – 25 Nm |
| – 2nd stage | 50 – 55 Nm |
| – 3rd stage | tighten by 90° |
| – 4th stage | tighten by 90° |
| – 5th stage (bolt M8) | 24 - 27 Nm |
| casing of the gas distribution system | 6.5 - 9.5 Nm |
| Upper chain guide bolt | 10 – 13 Nm |
| Bolt of fastening of the lower guide of a chain | 24 - 28 Nm |
| Intake manifold | 20 – 24 Nm |
| An exhaust manifold | 21 – 25 Nm |
| Spark plug | 20 – 28 Nm |
| thermostat housing | 9 – 12 Nm |
| Cylinder head cover bolts | 5 – 7 Nm |
| Thermal sensor for turning on the fan | 27 - 32 Nm |
| coolant temperature sensor | 15 – 20 Nm |
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