FORD SCORPIO

1985-1994 of release

Repair and car operation

3.5.1. A technical characteristics

THE GENERAL DATA

THE ENGINE

Engine code (is on the block of cylinders near to щупом)	STR, N-STR, SFA, SF, 4AB, 4BA, 4CA
Quantity of cylinders	4 abreast
Operating procedure of cylinders	1–3–4–2
Diameter of the cylinder	94,00 mm
Piston stroke	90,0 mm
Working volume	2499 sm3
Compression degree	23,0
Pressure at проворачивании the engine a starter	20 – 25
Capacity of kw/h.p.:
– Engine STR	51/69 at 4200 rpm.
– Engine SFA	68/92 at 4150 rpm.
– Engine SF	85/115 at 4200 rpm.
The maximum twisting moment:
– Engine STR	148 Nanometers at 2000 rpm.
– Engine SFA	201 Nanometers at 2000 rpm.
– Engine SF	270 Nanometers at 2200 rpm.

HEAD OF THE BLOCK OF CYLINDERS

The head is executed from an easy alloy with the inserted chambers of combustion, saddles and directing valves.

Height of a head of the block of cylinders	90 ± 0,15 mm
The maximum reduction of height of a head at processing	0,5 mm
Maximum неплоскостность the bottom plane of a head of the block of cylinders	0,15 mm
Diameter of an axis of levers	18,96 – 19,00 mm

Lining of a head of the block of cylinders

Linings of a head of the block of cylinders were made of a synthetic material and two thickness, and then three thickness had originally. The thickness of a lining steals up depending on выступания pistons over the top plane of the block of cylinders of the engine. The thickness of a lining is identified on number of cuts on its edge.

Выступание pistons	Thickness of a lining
From 0,69 to 0,79 mm	1,53 mm (a designation: 2 cuts)
From 0,79 to 0,89 mm	1,63 mm (a designation: 3 cuts)
More than 0,89 mm	1,73 mm (a designation: 4 cuts)

As spare parts linings only new type (three thickness) are made.

Combustion chambers

Vortical chambers of combustion, steel, inserted into a head of the block of cylinders and fixed by means of a ball.

Type of the chamber of combustion	Vortical Ricardo Comet Mark V
Diameter of a ball	3 mm
Выступание vortical chambers from the bottom plane of a head of the block of cylinders	0 – 0,03 mm

Saddles of valves

Saddles of valves впрессованы in a head of the block of cylinders.

Corner of a working facet of a saddle of the valve:
– The inlet	120 °
– The final	90 °
Width of a working facet	2,2 – 2,5 mm

Directing valves

Directing valves запрессованы in a head of the block of cylinders also are identical both for inlet, and to final valves.

External diameter:
– The nominal	14,048 – 14,059 mm
– The first repair	14,280 – 14,290 mm
– The second repair	14,579 – 14,590 mm
Internal diameter	8,520 – 8,542 mm
Length	55 mm
Distance between a directing and bottom plane of a head of the block of cylinders	27,95 – 28,05 mm

Valves

Valves are established in a head of the block of cylinders vertically and in parallel each other (at right angle to the bottom plane of a head of the block of cylinders).

Corner of a working facet:
– The inlet valve	120 °
– The final valve	90 °
Working backlash of valves on the cold engine (in four hours after last start):
– The engine without pressurisation:
• the inlet valve	0,30 – 0,35 mm
• the final valve	0,30 – 0,35 mm
– The engine with a turbo-supercharging:
• the inlet valve	0,10 – 0,20 mm
• the final valve	0,20 – 0,30 mm
Height of lifting of valves:
– The inlet valve	8,95 (Turbo 8,48) mm
– The final valve	8,22 (Turbo 8,27) mm
Distance from the bottom plane of a head of the block of cylinders to a valve plate:
– The inlet valve	0,75 – 1,25 mm
– The final valve	1,05 – 1,45 mm

The sizes of valves

The inlet valve:
– Length	116,25 mm
– Diameter of a plate of the valve	42,5 mm
– Diameter of a core	8,473 – 8,495 mm
– A thickness of a working edge of a plate of the valve	2,2 – 2,5 mm
The final valve:
– Length	116,25 mm
– Diameter of a plate of the valve	35,5 mm
– Diameter of a core	8,453 – 8,475 mm
– A thickness of a working edge of a plate of the valve	2,2 – 2,5 mm
As much as possible admissible backlash between a core of the valve and the directing plug	0,15 mm

Springs of valves

Length of a spring a free condition:
– The external	44,6 mm
– The internal	41,0 mm
Diameter of a wire of a spring:
– The external	4,6 mm
– The internal	2,4 mm

THE BLOCK OF CYLINDERS OF THE ENGINE

The block of cylinders of the engine is made of pig-iron.

Quantity of radical necks	5
Diameter of the cylinder:
– A nominal class And	94,000 – 94,015 mm
– Nominal class B	94,015 – 94,030 mm
– A repair 1 class With	94,200 – 94,215 mm
– Repair 1 class D	94,215 – 94,230 mm
– Repair 2 class Е	94,400 – 94,415 mm
– Repair 2 class F	94,415 – 94,430 mm
– Repair 3 class G	94,600 – 94,615 mm
– Repair 3 class H	94,615 – 94,630 mm
– Repair 4 class S	94,800 – 94,815 mm
– Repair 4 class K	94,815 – 94,830 mm
Diameter of a nest of a pusher:
– The nominal	24,00 – 24,03 mm
– The repair	24,20 – 24,23 mm
Backlash between a pusher and a nest	0,04 – 0,08 mm

KRIVOSHIPNO-SHATUNNYJ THE MECHANISM

Cranked shaft

Number of radical necks	5
Axial люфт a cranked shaft	0,08 – 0,29 mm
Fixing from axial moving	Persistent half rings
Thickness of persistent half rings:
– The nominal	2,30 – 2,33 mm
– The repair	2,50 – 2,53 mm
Backlash in radical bearings	0,040 – 0,098 mm
Diameter of radical necks:
– The standard	59,994 – 60,021 mm
– Reduced by 0,30 mm	59,694 – 59,721 mm
– Reduced by 0,50 mm	59,494 – 59,521 mm
– Reduced by 0,80 mm	59,194 – 59,221 mm
Length of a neck:
– A lobby	38,40 – 38,55 mm
– The intermediate	30,4 – 30,6 mm
– The central	37,76 – 37,81 mm
– The back	37,84 – 38,04 mm
Backlash in necks	0,040 – 0,098 mm
Diameter шатунных necks:
– The nominal	54,994 – 55,021 mm
– Repair (-0,3)	54,694 – 54,721 mm
Length of a neck	36,0 – 36,1 mm
Width шатунного the loose leaf	29,0 mm
The maximum effort проворачивания a cranked shaft	60 Nanometers

Radical loose leaves

These are thin-walled loose leaves with a cover from a steel sheet and an antifrictional material from a tsinko-aluminium alloy.

Width of loose leaves:
– Forward, average and back	29,80 mm
– The intermediate	21,80 mm

Rods

Aperture of a head of a rod:
– Top (under the plug)	32,975 – 33,000 mm
– The bottom	58,737 – 58,750 mm
The rod plug:
– Internal diameter	30,007 – 30,020 mm
– External diameter	33,000 – 33,025 mm
Axial backlash on a neck of a cranked shaft	0,10 – 0,25 mm
Backlash between the loose leaf and шатунной a neck	0,040 – 0,092 mm

Piston fingers

The finger is made of a steel and superficially tempered. The finger rotates in the piston and the plug of a head of a rod (a so-called floating finger) and is fixed from longitudinal moving by two spring lock rings.

Diameter of a finger:
– Engine STR	29,994 – 30,000 mm
– Engine SFA	32,000 mm

Pistons

Pistons are made of an aljuminievo-silicon alloy. The maximum difference of weights of the complete set of pistons of the engine should not exceed 5

Installation method in the cylinder: deepenings at the bottom of the piston (for plates of valves and the combustion chamber) should be from outside the fuel pump.

Diameter of the piston (measurements are made on distance of 15,8 mm from the piston bottom to perpendicularly piston finger):
– A nominal class And	93,855 – 93,900 mm
– Nominal class B	93,900 – 93,915 mm
– A repair 1 class With	94,085 – 94,100 mm
– Repair 1 class D	94,100 – 94,115 mm
– Repair 2 class Е	94,285 – 94,300 mm
– Repair 2 class F	94,300 – 94,315 mm
– Repair 3 class G	94,485 – 94,500 mm
– Repair 3 class H	94,500 – 94,515 mm
– Repair 4 class S	94,685 – 94,700 mm
– Repair 4 class K	94,700 – 94,715 mm
Выступание the piston from the block of cylinders of the engine	0,50 – 0,92 mm (Turbo 0,40 – 0,87 mm)

Piston rings

On each piston two sealing rings and one маслосъемное, consisting of three details are established.

Piston rings:
– The sealing top	Chromeplated, spherical
– компрессионное	With dredging (upwards)
– маслосъемное	U-shaped

Backlashes of locks of piston rings (established in the cylinder):
– The top sealing ring	0,40 – 0,65 mm (Turbo 0,25 – 0,50 mm)
– компрессионное a ring	0,35 – 0,60 mm (Turbo 0,20 – 0,40 mm)
– маслосъемное a ring	0,15 – 0,30 mm (Turbo 0,15 – 0,45 mm)
Height of rings:
– The sealing top	1,978 – 1,990 mm
– компрессионное	1,978 – 1,990 mm
– маслосъемное	4,478 – 4,490 mm

SYSTEM GAZORASPREDELENIJA

The system timing contains a camshaft established in the block of cylinders, pushers, cores of pushers, levers of valves and the valve.

The camshaft is put in action двухрядной by a chain from a cranked shaft.

Phases timing:
– Opening of inlet valves	8 ° before ВМТ
– Closing of inlet valves	40 ° after НМТ
– Opening of inlet valves	56 ° before НМТ
– Closing of inlet valves	12 ° after ВМТ

ВМТ and НМТ accordingly the top and bottom dead points.

Camshaft

The camshaft rotates in three bearings with a drive a chain.

Diameters of necks of a camshaft	41,925 – 41,950 mm
Working backlash of necks of a camshaft	0,05 – 0,11 mm
Axial люфт a camshaft	0,05 – 0,15 mm

GREASING SYSTEM

Greasing under pressure provides шестеренчатый the oil pump put in action from a camshaft through an angular tooth gearing. The greasing system has the replaced filter and an oil radiator.

Type of the oil pump	шестеренчатый
Engine oil volume:
– Without the filter	5,0 дм3
– With the filter	5,6 дм3
Engine oil type	API SE/CD or SF/CD
Viscosity of engine oil at temperature:
– From 20 ° With to +30 °С	SAE 10W-30
– Above-20 ° With	SAE 10W-40/10W-50
– Above-15 ° With	SAE 15W-40/15W-50
– More low-20 ° With	5W-30
Periodicity of replacement	Each 7500 km of run or time in six months

The gauge of pressure of oil

The gauge of pressure of oil is located in the holder of the oil filter.

Pressure of fire of a control bulb

0,08 – 0,10 МПа

COOLING SYSTEM

The closed contour of cooling with the nonfreezing liquid circulating under pressure, contains a radiator, a broad tank and the pump of a cooling liquid. Removal of air from system occurs automatically after engine start.

The pump of a cooling liquid

The centrifugal pump of a cooling liquid located on a forward wall of the block of cylinders, is put in action клиновым by a belt. The pump of a cooling liquid is not under repair and in case of malfunction it is necessary to replace it.

Diameter of a rotor

60 mm

The thermostat

The wax thermostat is located in one case with the pump of a cooling liquid.

Mark	Calorstat
Temperature of the beginning of opening	72 ° WITH
Temperature of full opening	81 ° WITH
The minimum valve stroke	7,5 mm

Cooling liquid

Quantity	9,5 дм3
Type	Special nonfreezing liquid Ford SQM 97 B 9103A
Periodicity of service	Level check each 7500 km of run (does not demand periodic replacement of a cooling liquid)

FUEL SYSTEM

The fuel system contains distributive fuel pump CAV Roto Diesel.

Fuel the pump

Роторный distributive fuel pump Roto Diesel is equipped by the hydraulic device of increase in a dose of fuel during cold start with automatic support of the raised number of turns of the idling, operated термостатически, and the electromagnetic valve of deenergizing of the engine (valve STOP), stopping fuel giving.

Mark and type	Roto Diesel or Lucas Roto Diesel
Injection order (the cylinder №1 from outside a flywheel)	1–3–4–2
The forcing beginning	Position of the piston of 1st cylinder of the engine of 2,85 mm before ВМТ or 18 ° before ВМТ
Number of turns of idling:
– Without pressurisation	800 rpm.
– With a turbo-supercharging	875 – 900 rpm.
Number of turns of the accelerated idling (the cold engine)	880 – 930 rpm.
The maximum number of turns (without loading)	4800 – 4850 rpm.
Time of reduction of turns with maximum before idling	5 seconds
Турбонагнетатель	Garret AiResearch T03

Atomizers

Atomizers are screwed in in a head of the block of cylinders.

The case of atomizers	Roto Diesel Or Bosch КСА 30 S 44
Pressure of opening of an atomizer:
– Without pressurisation	11,5 ± 0,5 МПа
– With a turbo-supercharging	13,0 ± 0,5 МПа

Candles накаливания

Mark and type	Bosch, Beru, Lucas or Champion CH68
Control temperature of heating of candles (within 7 seconds at the surrounding temperature 20 °)	850 ° WITH

THE TIGHTENING MOMENTS

Bolts of fastening of a head of the block of cylinders:
– 1 stage	30 Nanometers
– 2 stage	70 Nanometers
– 3 stage – to unscrew bolts in the order of a tightening on 90 ° and repeatedly to tighten	70 Nanometers
– 4 stage – after 10 minutes of work of the engine at 3000 rpm and cooling within 4 hours and to draw twice (once *) (to unscrew on 90 ° and to tighten)	70*/80 Nanometers
– 5 stage	To tighten on 120 °
Counternuts of adjusting bolts of levers	12,5 – 17,5 Nanometers
Cover of a head of the block of cylinders	3 – 4 Nanometers
Nuts of internal racks of an axis of levers	17 – 22 Nanometers
Cover of pushers	5 – 7,5 Nanometers
Masloslivnaja stopper	7,5 – 12,5 Nanometers
Маслоприемник	5 – 7,5 Nanometers
Pipe of a measuring instrument of level of oil	20 – 30 Nanometers
Covers of radical bearings	100 – 120 Nanometers
Covers шатунных bearings	53 – 62 Nanometers
Flywheel:
– 1 stage	15 Nanometers
– 2 stage	95 Nanometers
Pulley of a cranked shaft	240 – 260 Nanometers
The oil pump	25 – 30 Nanometers
Stoppers of the oil pump	80 – 100 Nanometers
Cover of the oil pump	5 – 7,5 Nanometers
Скоба for engine lifting	10 – 12 Nanometers
Stopper plum of a cooling liquid on the block of cylinders	20 – 30 Nanometers
Fastening nut муфты the radiator fan	30 – 40 Nanometers
Fastening of the mechanism of a tension of a belt of the generator	21-25 Nanometers
Candles накаливания	30 – 40 Nanometers
Transmission to the engine:
– Type	40 – 50 Nanometers
– Type МТ-75	70 – 90 Nanometers

* It is applied only to bolts in length of 70 and 95 mm.