FORD SCORPIO

1985-1994 of release

Repair and operation of the car



Ford Skorpio
+ 1.1. Identification of the car
+ 2. Maintenance
- 3. Engines
   + 3.1. OHC engine
   - 3.2. DOHC engine
      3.2.1. Technical characteristic
      + 3.2.2. The repair which is not demanding removal of the engine
      + 3.2.3. Removal and installation of the engine without transmission
      3.2.4. System of ventilation of a case
      + 3.2.5. Lubrication system
   + 3.3. V6 engine
   + 3.4. Systems of ignition and engine management
   + 3.5. Diesel engines
+ 4. Cooling system
+ 5. Fuel system
+ 6. Coupling
+ 7. Transmissions
+ 8. Driveshaft and back bridge
+ 9. Steering
+ 10. Suspension brackets
+ 11. Brake system
+ 12. Wheels and tires
+ 13. Body
+ 14. Electric equipment


9d8db598

3.2. DOHC engine

3.2.1. Technical characteristic

GENERAL INFORMATION

The engine – petrol, four-cycle, four-cylinder, line, water cooling, has two camshafts in a head of the block of cylinders, is installed is longitudinal ahead of the car.

ENGINE

Key parameters

Engine
2,0 DOHC
2,0 DOHC
2,0 DOHC
2,0 DOHC
Engine type
N8B
N8D
N9B
N9D
Diameter of the cylinder, (mm)
86,00
86,00
86,00
86,00
Piston stroke, (mm)
86,00
86,00
86,00
86,00
Volume, (cm3)
1998
1998
1998
1998
Extent of compression
10,3
10,3
10,3
10,3
Pressure of compression, (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
  – h.p. at rpm
105 at 5600
109 at 5600
125 at 5500
120 at 5500
The maximum torque, (Nanometer at rpm)
168 at 3000
174 at 3000
168 at 3000
171 at 2500

HEAD OF THE BLOCK OF CYLINDERS

The head is made of special aluminum alloy and has steel plug-in saddles of valves.

Regrinding of the lower plane of a head of the block of cylinders is not provided.

Designation
20
Diameters of openings of nests of bearings of the camshaft
26,000 – 26,030 mm

Laying of a head of the block of cylinders

Brand: Reinz.

Guides of valves

Guides of valves are made of cast iron and pressed in a head of the block of cylinders at an angle 20 °.

Nominal diameter: 7,063–7,094 mm.

Valve

The valve are established in a head of the block of cylinders and are inclined at an angle 20 ° to an axis of the cylinder and are put in action from cams of camshafts through hydraulic pushers. The Rabosy gap of valves is regulated automatically.

Sizes of valves

Valve inlet:
  – valve length
108,24 – 108,70 mm
  – diameter of a plate
42,50 – 42,70 mm
  – diameter of a core:
     • 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
  – a core gap in a guide
0,020 – 0,069 mm
  – corner of a working facet
90 °
Valve final:
Valve length
108,71 – 109,17 mm
  – diameter of a plate
37,90 – 38,10 mm
  – diameter of a core
     • 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
  – a core gap in a guide
0,046 – 0,095 mm
  – corner of a working facet
90 °

Springs of valves

About two springs on the valve are applied.

Springs of inlet valves:
  – diameter of a spring
24,00 mm
  – diameter of a wire of a spring
4,5 mm
  – number of rounds
6,1
  – free length
46,80 mm
Springs of final valves:
  – diameter of a spring
17,5 mm
  – diameter of a wire of a spring
2,5 mm
  – number of rounds
8,0
  – free length
48,20 mm

BLOCK OF CYLINDERS OF THE ENGINE

The block of cylinders of the engine is cast from cast iron. Cylinders are executed directly in the block of cylinders.

Designation
20
Width of the basic bearing
27,17 – 27,22 mm
Internal diameters of radical bearings (it is measured down):
  – 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
Diameters of openings of nests of radical bearings in the block of cylinders:
  – nominal size
59,287 – 59,300 mm
  – repair size +0,4
59,687 – 59,700 mm
Diameters of cylinders:
  – diameters are nominal standard:
     • 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
  – 2nd repair size +0,50
86,500 – 86,510 mm

KRIVOSHIPNO-SHATUNNYY MECHANISM

Bent shaft

The steel bent shaft leans on five bearings.

Axial side play
0,09 – 0,30 mm
Diameters of radical necks:
  – nominal size (yellow tag)
54,980 – 54,990 mm
  – nominal size (red tag)
54,990 – 55,000 mm
  – repair size-0,25 (green tag)
54,730 – 54,750 mm
Gap in radical bearings
0,011 – 0,048 mm

Prevention

To take measurement by means of measuring cores of Plastigage.


Diameters of conrod necks:
  – nominal size
50, 890 – 50,910 mm
  – repair size-0,25 (green tag)
50,640 – 50,660 mm
Thickness of persistent half rings:
  – nominal size
2,301 – 2,351 mm
  – repair size
2,491 – 2,541 mm

Flywheel

The flywheel is fixed on a flange of a bent shaft by six bolts located at different distance one from another.

Rods

Rods are shaped from steel and in section have a dvutavrovy profile. In the lower part of a rod there is an oil spray for lubricant and cooling of pistons. The piston finger is pressed in a rod head.

Diameter of an opening of a head of a rod
20,589 – 20,609 mm
Finger tightness in a rod head
0,018 – 0,039 mm
Temperature of heating of a head of a rod in the course of installation of a finger
250 – 300 °C
Diameter of an opening of the basis of a rod
53,890 – 53,910 mm
Internal diameters of openings of connecting rods:
  – 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
Gap in conrod bearings
0,006 – 0,060 mm

Prevention

To take measurement by means of measuring cores of Plastigage.


Admissible not perpendicularity of an axis of openings concerning a rod axis:
  – head opening
0,10 mm
  – basis opening
0,15 mm

Pistons

Pistons are manufactured of light alloy, without flutes on the carrying-out part, with the filled-in invarny ring limiting thermal changes of the sizes. In the top part there are three flutes for piston rings. The axis of an opening of a piston finger is displaced concerning a piston axis. Pistons are delivered in sets together with fingers and rods.

Installation method: the arrow at the bottom of the piston has to be directed towards a forward part of the engine (towards the drive of system of gas distribution).

Sizes of pistons

Engine
2,0 dm3
Diameters are nominal standard:
  – group 1
85,970 – 85,980 mm
  – group 2
85,980 – 85,990 mm
Diameters of the repair sizes:
  – standard
85,980 – 86,000 mm
  – with the admission 0,15
86,130 – 86,150 mm
  – with the admission 0,50
86,470 – 86,490 mm
Gap of new pistons in cylinders
0,020 – 0,040 mm

Piston fingers

Fingers, are made of steel, and subjected to heat treatment, pressed in heads of rods (hot installation at a temperature of head of 250-300 °C) and are turned in piston naves.

Length
63,40 mm
Diameter:
  – designation in white color
20,622 – 20,625 mm
  – designation in red color
20,625 – 20,628 mm
  – designation in blue color
20,628 – 20,631 mm
  – designation in yellow color
20,631 – 20,634 mm
Gap in piston naves
0,008 – 0,014 mm
Tightness in a rod head
0,018 – 0,039 mm

Piston rings

Each piston has three rings: two sealing (top square section, average of conic section) and one oil scraper.

Gap of the lock of the sealing rings (installed in the cylinder):
  – top
0,30 – 0,60 mm
  – average
0,50 – 0,80 mm
Gap of the lock of an oil scraper ring
0,40 – 1,50 mm
Arrangement of locks of rings:
  – sealing
on 150 ° (to the opposite sides) concerning the lock of an oil scraper ring
  – oil scraper
the lock of the holding apart spring is put according to the direction of an arrow at the bottom of the piston locks of the top and lower plates are installed on 25 mm from the direction of an arrow to the right and to the left

SYSTEM OF GAS DISTRIBUTION

Camshafts are located in a head of the block of cylinders, set in motion of the valve directly through pushers and are put in action by a single-row chain.

Distribution phases


Engine
N8B
N9B
OZD
13 ° before VMT
13 ° before VMT
ZZD
39 ° after NMT
51 ° after NMT
OZW
43 ° before NMT
43 ° before NMT
ZZW
13 ° after VMT
13 ° after VMT

OZD and ZZD – respectively opening and closing of the inlet valve.
OZW and ZZW – respectively opening and closing of the final valve.
VMT and NMT – respectively the top and lower dead points.

Driving chain

Driving chain – single-row, roller 3/8 inch in size.

The tension of a chain is made by a hydraulic natyazhitel.

Camshafts

Camshafts rotates in five bearings.

Diameters of bearings of camshafts
25,960 – 25,980 mm
Axial side play of the camshaft
0,020 – 0,260 mm
Raising of cams:
  – inlet, N8B engine
10,5 mm
  – inlet, N9B engine
11,1 mm
  – final
10,9 mm

LUBRICATION SYSTEM


Lubricant under pressure is provided by the gear oil pump with the drive a chain from a bent shaft in which case there is perepuskny a valve.

The minimum pressure of oil (at a temperature of 80 °C):
  – at 750 rpm
0,16 MPas
  – at 2000 rpm
0,37 – 0,46 MPas
Pressure of opening of the perepuskny valve (at 1000 rpm)
0,37 – 0,46 MPas
Pressure of fire of a control bulb of pressure of oil
0,03 – 0,06 MPas

About reduction of level of engine oil the control bulb on a combination of devices signals.

The volume of engine oil in the engine, dm3:
  – with replacement of the filter
4,50
  – without replacement of the filter
4,00

Oil pump

The gear oil pump, with an internal arrangement of teeths, is put in action by a chain from a bent shaft and is located in a forward part of the engine.

Gear wheel gap with an internal arrangement of teeths concerning the case
0,150 – 0,301 mm
Gap between teeths of gear wheels
0,05 – 0,20 mm
Axial gap of gear wheels
0,039 – 0,104 mm

Oil filter

Full-flowing oil filter with the replaceable filtering element.

Brand: Motorcraft.

COOLING SYSTEM

The closed cooling contour with nonfreezing liquid contains a radiator, a broad tank, the pump of cooling liquid, the thermostat and the fan.

Radiator and broad tank

The radiator with a cross stream has tanks from artificial material.

The broad tank is made of transparent material and has designations of the maximum and minimum levels of cooling liquid.

Pressure of opening of the valve of excessive pressure in a stopper of a broad tank: 120 – 140 kPa.

Pump of cooling liquid

The centrifugal pump of cooling liquid located on a forward wall of the block of cylinders is put in action by a maple belt together with the generator.

Fan

The fan with the electric drive from the thermal sensor of the radiator located in a drain stopper.

Thermostat

Temperature began opening: 85–89 °C.

Temperature of full opening: 102 ±3 °C.

Cooling liquid

Quantity:
  – N8B engine
7,9 dm3
  – N9B engine
7,3 dm3
Type
mix of special nonfreezing Ford SSM 97 B 9103 A liquid and the distilled water (on 50%) form protection to -30 °C
Frequency of replacement
each 60 000 km of a run of the car or time in two years

Tightening moments

Bolts of covers of radical bearings
88 – 102 Nanometers
Bolts of covers of bearings of camshafts
22 – 26 Nanometers
Bolts of rods:
  – 1st stage
6 – 8 Nanometers
  – 2nd stage
15 – 17 Nanometers
  – 3rd stage
to tighten on a corner 90 °
Damper of tortional fluctuations:
  – 1st stage
45 – 58 Nanometers
  – 2nd stage
to tighten on a corner 90 °
Bolt of a pulley of a bent shaft
110 – 130 Nanometers
Camshaft asterisk bolt
55 – 63 Nanometers
Flywheel bolts
82 – 90 Nanometers
Bolts of fastening of the oil pump
8,5 – 11,5 Nanometers
Bolts of the oil pallet
8 – 11 Nanometers
Stopper of discharge of oil in the oil pallet
21 – 28 Nanometers
Bolt of fastening of a natyazhitel of a chain of the oil pump
10 – 13 Nanometers
Oil pressure sensor
18 – 22 Nanometers
Bolt of fastening of the water pump
21 – 28 Nanometers
Bolt of fastening of a pulley of the water pump
21 – 28 Nanometers
Bolts of a head of the block of cylinders:
  – 1st stage
20 – 25 Nanometers
  – 2nd stage
50 – 55 Nanometers
  – 3rd stage
to tighten on a corner 90 °
  – 4th stage
to tighten on a corner 90 °
  – 5th stage (M8 bolt)
24 – 27 Nanometers
Casing of system of gas distribution
6,5 – 9,5 Nanometers
Bolt of fastening of the top uspokoitel of a chain
10 – 13 Nanometers
Bolt of fastening of the lower uspokoitel of a chain
24 – 28 Nanometers
Inlet collector
20 – 24 Nanometers
Final collector
21 – 25 Nanometers
Spark plugs
20 – 28 Nanometers
Thermostat case
9 – 12 Nanometers
Bolts of a cover of a head of the block of cylinders
5 – 7 Nanometers
Thermal sensor of turning on of the fan
27 – 32 Nanometers
Sensor of temperature of cooling liquid
15 – 20 Nanometers