Peugeot 405

1987-1997 of release

Repair and operation of the car



Peugeot 405
+ 1. Maintenance instruction
+ 2. Maintenance
- 3. Engines
   - 3.1. Petrol engines
      3.1.1. Technical characteristic
      + 3.1.2. Repair of the engine
   + 3.2. Diesel engines
   + 3.3. Petrol engine 1,4 of dm3
   + 3.4. System of ignition
+ 4. Fuel system
+ 5. Lubrication systems, coolings
+ 6. System of release
+ 7. Coupling
+ 8. Transmissions
+ 9. Power shafts
+ 10. Steering
+ 11. Suspension brackets
+ 12. Brake system
+ 13. Body
+ 14. Electric equipment


e1bd1949



3.1.1. Technical characteristic

GENERAL INFORMATION

ENGINE

Head of the block of cylinders

The head is made of light alloy and has the inserted saddles and guides of valves. Bearings of the camshaft are executed in material of a head of the block of cylinders.

Nominal height:
  – engines 1580 of cm3, 1761 cm3 and 1905 cm3 (with 8 valves) and 1998 cm3 (with 8 and 16 valves)
158,93 ± 0,05 mm
  – cm3 engine 1905 (16 valves)
132,00 ± 0,05 mm
The minimum height after regrinding:
  – engines 1580 of cm3, 1761 cm3 and 1905 cm3 (with 8 valves) and 1998 cm3 (with 8 and 16 valves)
158,73 mm
  – cm3 engine 1905 (16 valves)
131,80 ± 0,05 mm
Maximum admission of not planeness of the lower surface of a head
0,05 mm
Internal diameter of bearings of the camshaft in a head of the block of cylinders:
Cm3 engines 1580 and 1905:
  – 1
27,000 – 27,033 mm
  – 2
27,500 – 27,533 mm
  – 3
28,000 – 28,033 mm
  – 4
28,500 – 28,533 mm
  – 5
36,000 – 36,039 mm

Valves

The head of the block of cylinders has 8 (or 16) the valves installed in parallel among themselves and at right angle to the lower surface of a head.

Sizes of valves

Diameter of a plate of the valve:
  – inlet valves:
     • cm3 engine 1580
41,6 mm
     • cm3 engine 1761
there are no data
     • the cm3 engine 1905 (with 8 valves)
41,8 mm
     • the cm3 engine 1998 (with 8 valves)
42,6 mm
     • engines 1905 of cm3 and 1998 cm3 (with 16 valves)
34,7 mm
  – final valves:
     • engines 1580 of cm3 and 1905 cm3
34,7 mm
     • cm3 engine 1761
there are no data
     • the cm3 engine 1998 (with 8 valves)
34,5 mm
     • engines 1905 of cm3 and 1998 cm3 (with 16 valves)
29,7 mm
Diameter of a core of the valve:
  – inlet valves:
     • engines 1580 of cm3 and 1905 cm3 (with 8 valves)
7,83 – 8,13 mm
     • cm3 engine 1761
there are no data
     • the cm3 engine 1998 (with 8 valves)
7,83 – 7,98 mm
     • engines 1905 of cm3 and 1998 cm3 (with 16 valves)
6,83 – 6,98 mm
  – final valves:
     • engines 1580 of cm3 and 1905 cm3
7,83 – 8,13 mm
     • cm3 engine 1761
there are no data
     • the cm3 engine 1998 (with 8 valves)
7,82 – 8,12 mm
     • engines 1905 of cm3 and 1998 cm3 (with 16 valves)
6,83 – 6,98 mm
Valve length:
  – inlet valves:
     • engines 1580 of cm3, 1905 cm3 and 1998 cm3 (with 8 valves)
108,79 ± 0,1 mm
     • cm3 engine 1761
there are no data
     • engines 1905 of cm3 and 1998 cm3 (with 16 valves)
104,48 ± 0,1mm
  – final valves:
     • engines 1580 of cm3, 1905 cm3 and 1998 cm3 (with 8 valves)
108,37 ± 0,1 mm
     • cm3 engine 1761
there are no data
     • engines 1905 of cm3 and 1998 cm3 (with 16 valves)
103,00 ± 0,1mm
Corner of a prileganiye of valves
90 °
Width of a working edge
1,1 mm
Working gap of valves, except engines with 16 valves (on the cold engine):
  – inlet valve
0,20 mm
  – final valve
0,40 mm

Prevention

Final valves do not grind.


Saddles of valves

Saddles of valves are inserted into a head of the block of cylinders and are not subject to replacement.

Guides of valves

Guides of valves plug-in, are made of cast iron or of brass.

Outer diameter:
  – nominal
13 + 0,08 or 13 + 0,05 mm
  – repair size
13,13 ± 0,011 mm; 13,29 ± 0,011 mm; 13,59 ± 0,011 mm

Springs of valves


About one spring on the valve is used. Inlet and final valves have identical springs.

Characteristic of springs

XU5 engine:
  – designation
green
  – height:
     • at load of 400 N
42,5 mm
     • at load of 800 N
31,0 mm
XU9 engine:
  – designation
black
  – height:
     • at load of 410 N
40,5 mm
     • at load of 860 N
30,0 mm
  – designation
gray
  – height:
     • at load of 395 N
41,5 mm
     • at load of 780 N
31,0 mm

Pushers

Pushers move directly in material of a head of the block of cylinders. Adjustment of a working gap of valves is based on installation of adjusting plates of the corresponding thickness between cores of valves and pushers.

Engines with 16 valves have the hydraulic pushers providing automatic adjustment of gaps of valves.

Diameter of plates
13,5 mm
Thickness of plates:
  – through each 0,025 mm
from 1,650 to 3,000 mm
  – through each 0,075 mm
from 3,025 to 3,550 mm
  – through each 0,025 mm
from 3,575 to 4,000 mm

Laying of a head of the block of cylinders

Brand
Reinz or Curty
Laying thickness:
  – nominal
1,2 mm
  – for a repolished head
1,4 mm (designation by means of a cut and an opening with a diameter of 4 mm on a ledge on one of the ends of laying)
Installation
ledge from a flywheel

Block of cylinders of the engine


The block of cylinders of the engine on models with a working volume of 1580 cm3, 1761 cm3 and 1905 cm3 (with 8 and 16 valves) is manufactured of light alloy and has plug-in wet sleeves of cylinders. On models with a working volume of 1998 cm3 (with 8 and with 16 valves), cylinders are executed directly in a body of the block of cylinders.

Diameter of the bearing surface of radical bearings of a bent shaft: 63,708–63,727 mm.

Sleeves of cylinders


Plug-in sleeves of cylinders of clamping type, and tightness is provided with a round sealing ring.

Selection in couples of sleeves and pistons is obligatory: alphabetic reference is put on the bottoms of pistons and on the top edges of sleeves.

Diameter of boring of the cylinder of the engine:
  – engines 1580 of cm3, 1761 cm3 and 1905 cm3 (with 8 valves):
     • group A
from 83,000 to 83,010 mm
     • group B
from 83,010 to 83,020 mm
     • group C
from 83,020 to 83,030 mm
  – cm3 engines 1998 (with 8 valves):
     • group A
from 86,000 to 83,010 mm
     • group B
from 86,250 to 86,268 mm
     • group C
from 86,600 to 86,618 mm
  – the cm3 engine 1905 (with 16 valves):
     • group A
from 83,000 to 83,010 mm
     • group B
from 83,010 to 83,020 mm
     • group C
from 83,020 to 83,030 mm
Sleeve ledge concerning the block of cylinders, except 1998 cm3 (measured without round sealing ring)
0,03 – 0,10 mm
The maximum distinction between any two sleeves:
  – engines with 8 valves
0,05 mm
  – engines with 16 valves
0,02 mm

KRIVOSHIPNO-SHATUNNYY MECHANISM

Bent shaft

The bent shaft is made of cast iron and leans on five radical bearings.

Longitudinal side play of a bent shaft:
  – engines with 8 valves
from 0,07 to 0,32 mm
  – engines with 16 valves
from 0,07 to 0,27 mm
Diameter of radical necks:
  – engines 1580 of cm3, 1905 cm3 and 1998 cm3:
     • standard
from 59,981 to 60,000 mm
     • repair
from 59,681 to 59,700 mm
  – cm3 engine 1761
there are no data
Diameter of conrod necks:
  – engines 1580 of cm3, 1905 cm3 and 1998 cm3:
     • standard
from 49,984 to 50,000 mm
     • repair
from 49,684 to 49,700 mm
  – cm3 engine 1761
there are no data
Working gap in radical bearings:
  – engines 1580 of cm3, 1761 cm3 and 1905 cm3
from 0,025 to 0,050 mm
  – cm3 engines 1998
from 0,038 to 0,069 mm
Working gap in conrod bearings (all models)
from 0,025 to 0,050 mm

Inserts of radical bearings

Thickness:
  – nominal
1,842 ± 0,003 mm
  – repair size
1,992 ± 0,003 mm

Inserts of conrod bearings

Cm3 engine 1580:
  – nominal thickness
1,812 ± 0,01 mm
  – repair size
1,962 ± 0,01 mm
Cm3 engine 1905:
  – nominal thickness
1,833 ± 0,003 mm
  – repair size
1,983 ± 0,003 mm

Persistent half rings (axial bearings of sliding)

Thickness:
  – nominal
2,30 or 2,35 mm
  – repair sizes
2,40, 2,45 and 2,50 mm

Flywheel

The flywheel is screwed on a bent shaft by eight bolts.

Number of teeths of a gear wreath: 136.

Rods

Rods are shaped from steel. Have the thin-walled inserts made of aluminum-tin alloy.

Distance between axes:
  – cm3 engine 1580
150,5 mm
  – cm3 engine 1905
143,0 mm
Diameter of an opening of the top head of a rod
22 ± 0,029 mm
Diameter of an opening of the lower head of a rod:
  – cm3 engine 1580
48,655 ± 0,016 mm
  – cm3 engine 1905
53,695 ± 0,013 mm
The maximum difference in weight between rods of the same engine:
  – engines 1580 of cm3, 1761 cm3 and 1905 cm3
13 g
  – cm3 engine 1998
7,0 g

Pistons

Pistons are manufactured of light alloy. The finger is fixed in a rod with a tightness, and in the piston – is free.

Installation: the arrow has to be directed to the bottom of the piston towards the camshaft drive.

Selection in couples of sleeves and pistons: 3 groups of pistons: And, In and With correspond to 3 groups of sleeves of the cylinders designated by the same letters (on the top edges).

Diameter of pistons
Engines 1580 of cm3, 1761 cm3 and 1905 cm3 (with 8 valves):
  – group A
82,960 ± 0,007 mm
  – group B
82,970 ± 0,007 mm
  – group C
82,980 ± 0,007 mm
The cm3 engine 1905 with 16 valves:
  – group A
from 82,963 to 82,977 mm
  – group B
from 82,973 to 82,987 mm
  – group C
from 82,983 to 82,997 mm

Piston rings

Gaps in the lock:
  – top sealing ring:
     • cm3 engine 1580
from 0,4 to 0,6 mm
     • cm3 engine 1905
from 0,2 to 0,4 mm
     • engines 1761 of cm3 and 1998 cm3
from 0,3 to 0,5 mm
  – second sealing ring:
     • engines 1580 of cm3 and 1905 cm3
from 0,15 to 0,35 mm
     • engines 1761 of cm3 and 1998 cm3
from 0,3 to 0,5 mm
Oil scraper ring, all models
from 0,3 to 0,5 mm

As spare parts only rings of UFLEX which replaced earlier applied rings are now delivered. Are established without gap on the lock. Their installation demands strong compression, and also bigger attention and accuracy not to break a ring.

Piston fingers


Steel fingers are ground. Fasten freely in pistons and with a tightness in rods. There are 3 groups of the fingers corresponding to piston groups, designated by color paint.

On models with 16 valves piston fingers have the sliding landing in a rod and are recorded by lock rings.

Compliance of designation on the piston to color of a sign on a finger

1
blue
2
white
3
red

SYSTEM OF GAS DISTRIBUTION

The system of gas distribution consists of the block of cylinders of the camshaft fixed in five bearings installed in a head and put in action by a gear belt. The camshaft operates operation of valves by means of the pushers supplied with plates of adjustment of a gap.

Phases of gas distribution decide on a theoretical gap in 1 mm.

XU5 engine:
  – opening of the inlet valve
6 ° 30' advancing
  – closing of the inlet valve
31 ° 18'
  – opening of the final valve
41 ° 18'
  – closing of the final valve
3 ° 30'
XU9 engine:
  – opening of the inlet valve
3 ° delay
  – closing of the inlet valve
46 °
  – opening of the final valve
40 ° 8'
  – closing of the final valve
2 ° 2'

Camshaft

The camshaft is installed in a head of the block of cylinders and fixed in five bearings executed directly in material of a head of the block of cylinders and is put in action by a gear belt.

Diameter of bearings of the camshaft (engines 1580 of cm3 and 1905 cm3):
– 1
26,980 – 26,959 mm
– 2
27,480 – 27,459 mm
– 3
27,980 – 27,959 mm
– 4
28,480 – 28,459 mm
– 5
35,975 – 35,950 mm

Gear belt

Brand: Uniroyal Powergrip 58113 x 17.

The tension of a belt provides the roller tension device.

LUBRICATION SYSTEM

Lubricant under pressure is provided by the oil pump put in action by a chain from a bent shaft.

The sensor of pressure of oil is adjusted on 0,08 MPas.

Since April, 1987 the oil pump is 5 mm higher. The remote element which was between the pump and the block of cylinders and also the intermediate plug fastening on the block of cylinders is removed.

The new pump can be installed instead of old provided that the intermediate element will be removed, and under bolts of fastening of the pump washers will be enclosed.

Length of a chain of the drive remained invariable.

Oil pump

The case of the gear oil pump is manufactured of light alloy.

Oil pressure at a temperature of 90 °C:
  – XU5 engine
0,35 MPas at 4000 rpm
  – XU7 engine
0,53 MPas at 4000 rpm
  – XU9 engine
0,41 MPas at 4000 rpm
  – XU10 engine
0,52 MPas at 4000 rpm

Oil filter

The oil filter with the replaced element has the valve connected bypass.

Brand and type: Purflux LS 468 A.

Engine oil


Quantity:
  – the XU engine (8 valves) without filter
4,5 dm3
  – the XU engine (8 valves) with the filter
5,0 dm3
  – the XU engine (16 valves) without filter
5,0 dm3
  – the XU engine (16 valves) with the filter
5,3 dm3
The recommended type
SAE 10W/40 or 15W/50, API SF, CCMC G3, Esso Super Oil 10W/40 or Shell Puissance 5 SAE 10W/40

COOLING SYSTEM


The engine is cooled under pressure (0,1 MPas) mix of water and special nonfreezing liquid. Are a part of the cooling system: a radiator, the pump of cooling liquid, a broad tank and the fan with the electric motor.

Pump of cooling liquid

The centrifugal pump of cooling liquid is installed in the block of cylinders of the engine and is put in action by a gear belt.

Radiator

The radiator has an aluminum core of a horizontal current.

Brand: Chausson or Valeo.

Thermostat

Temperature began opening:
  – cm3 engines 1580:
     • all engines except B2A (XU52C) and BDY (XU5M)
88 °C
     • B2A (XU52C) and BDY (XU5M) engines
82 °C
  – cm3 engines 1761
88 °C
  – cm3 engines 1905:
     • all engines, except D2H (XU92C), D5A (XU92C) and D6D (XU9J2)
88 °C
     • D2H (XU92C), D5A (XU92C) and D6D (XU9J2) engines
82 °C
  – cm3 engines 1998:
     • RFX (XU10J2C) and RFY (XU10J4) engines
89 °C
     • RGZ (XU10J4) engine
88 °C
Temperature of full opening:
  – cm3 engines 1580:
     • all engines, except B2A (XU52C), B3B (XU51C) and BDY (XU5M)
100 °C
     • B2A (XU52C) engine
93 °C
     • B3B (XU51C) engine
102 °C
     • BDY (XU5M) engine
94 °C
  – cm3 engines 1761
100 °C
  – cm3 engines 1905:
     • all engines, except D2H (XU92C), D5A (XU92C) and D6D (XU9J2)
100 °C
     • D2H (XU92C) and D5A (XU92C) engines
93 °C
     • D6D (XU9J2) engine
94 °C
  – cm3 engines 1998:
     • RFX (XU10J2C) and RFY (XU10J4) engines
101 °C
     • RGZ (XU10J4) engine
100 °C

Fan

The fan is put in action by the electric motor and has two speeds.

Temperature
1 speed
2 speed
Inclusions
90 °C
94 °C
Switching off
86 °C
90 °C

Temperature sensor


Temperature of inclusion of a control bulb: 110 °C.

Cooling liquid

Quantity
6,6 dm3
The recommended type
mix of water and nonfreezing liquid in a proportion 1:1 (to -17 °C)
Frequency of replacement of cooling liquid and washing of a contour of cooling
each 2 years

POWER SUPPLY SYSTEM

Fuel tank

The fuel tank is made of artificial material and installed under a floor before a back axis.

Volume: 70 dm3 (gasoline 98 or unleaded Eurosuper 95 gasoline).

Fuel pump

The mechanical, diaphragm fuel pump is put in action by the clown of the camshaft.

Air filter

Look
dry filter
Brand and type
Mann Microtop C 33 156

Carburetor

The two-chamber carburetor has the automatic starting arrangement, pneumatic enrichment at the maximum power and blocking of the second camera at the cold engine.

Brand and type:

 – XU5 engine: Solex 34/34 Z1 designation 446/460;
 – XU9 engine: Solex 34/34 Z1 designation 447/462.

Carburetor type
Solex 34/34 Z1 446/460
Solex 34/34 Z1 447/462
1 camera
2 camera
1 camera
2 camera
Diameter of the diffuser (mm)
25
27
26
27
Main fuel jet
1,150
1,275
1,200
1,225
Main air jet
1,450
1,600
1,500
1,600
Main air jet
18
ZC
BZ
ZC
Fuel jet of idling
0,46
0,90
0,45
0,90
Air jet of idling
1,45
1,45
1,45
1,45
The calibrated jet of the enriching device
0,5
0,5
Diameter of a saddle of the needle valve
1,8
1,8
Spray of the accelerating pump
0,35
0,35
0,40
0,40
Opening 2 cameras
9 °
9 °
Fuel level in the float-operated camera (mm)
33,5
33,5
Turns of "bystry" idling (rpm)
2450 – 2600
2450 – 2600
Turns of idling (rpm)
750 ± 100
750 ± 100
Contents FROM (%)
0,8 – 1,5
0,8 – 1,5
Minimum content of CO2 (%)
10
10

SINGLE-POINT SYSTEM OF INJECTION OF FUEL


System type:
  – XU5 engine (BDZ and BDY)
Magneti Marelli G5 is single-point
  – XU5 (BDY) engine
MagnetiMarelli G6 is single-point
  – XU9 (DDZ) engine
Solex Fenix IB is single-point

Fuel pump

Electric type, external (early models) or internal (later models).

Pressure of giving of the pump:
  – system of injection Fenix IB, MM G5 and MM G6
0,7 – 0,8 bars
  – system of injection Bosch MA3. 0
1,0 ± 0,1 bars
Pump productivity:
  – system of injection Fenix IB and Bosch MA3
0 – 370 cm3 in 15 seconds
  – system of injection MM G5 and G6
360 cm3 in 15 seconds

MULTIPOINT SYSTEMS OF INJECTION OF FUEL

System type:
  – engine XU5 (BFZ), XU7 (LFZ), XU10 (RFX), XU10 (R6D)
Magnett Marelli 8P is multipoint
  – XU5 (BFZ) engine
Sagern-Lucas 4GJ is multipoint
  – XU7 (LFZ) engine
Bosch Motronic MP5. l is multipoint
  – XU9 engine (D6A and D6D)
Bosch L3. l-Jetronic is multipoint
  – XU9 (D6D) engine
Bosch Motronic MP3. l is multipoint
  – XU9 engine (DKZ and DFZ)
Bosch LU2-JETRONIC is multipoint
  – the XU9 engine (DKZ and DFV), XU9 (DFW with 16 valves)
Bosch Motronic MI. 3 multipoint
  – the XU9 engine (D6C with 16 valves)
Bosch Motronic ML4. l is multipoint
  – the XU10 engine (RFY with 16 valves), XUIO (RFT)
Bosch Motronic MP3. 2 multipoint

Fuel pump


Electric type, external (early models) or internal (later models).

Pressure created by the fuel pump at the specified idling speed:
  – Bosch L3 system. l
2,5 bars
  – other Bosch of system
3,0 ± 0,2 bars
  – Magneti Marlli system
2,5 ± 0,2 bars
Idling speed:
  – Boscn L3 system
925 ± 25 rpm
  – other systems
850 ± 50 rpm

The recommended fuel


Minimum octane number:
  – engines TU3 (KIA), TU3A (KIG), XU92C (D2D), XU9J2 (DGA),XU9J4 (D6C), XU52C (B2A)
97
  – other models
95

SYSTEM OF IGNITION

Models with the L3 carburetor. l-Jetronlc and LU2-JETRONIC
contactless system of ignition
Other models except XU10J4 with 16 valves
the compound system of ignition operated by the ECU block
The XU10J4 models (with 16 valves)
the direct system of ignition operated by the ECU block

The transistor contactless system of ignition has the distributor with the built-in sensor of effect of Hall, and also regulators – centrifugal and vacuum.

Distributor

Brand
Bosch or Ducellier
Designation of characteristics:
  – XU5 engine
With 005 and D 020
  – XU9 engine
With 053 and D 040
Initial corner of an advancing of ignition:
  – XU5 (B2A) and XU9 (D2H) engines with the carburetor
10 ° before VMT at 750 rpm
  – models with system of injection of fuel:
     • L3. l-Jetronic
5 ° before VMT at 900 rpm
     • LU2-Jetronic
10 ° before VMT at 850 rpm
  – all other models
are run by the ECU block it (is not regulated)

Ignition order
1–3–4–2 (No. 1 from the camshaft drive)

Prevention

If fuel with low octane number is used, installation of a corner of an advancing of ignition has to be reduced on 3 ° on the following engines: XU92C (D2D), XU9J2 (D6A), XU9J4 (D6C) and XU52C (B2A).


Characteristics of an advancing of ignition (XU9 engine)

And – the centrifugal regulator,

In – the vacuum regulator

During check at the stand (the distributor of ignition is removed) values need to be reduced by a half. During check of the distributor installed in the car it is necessary to add the size of an initial corner of an advancing of ignition.

Characteristics of an advancing of ignition (XU5 engine)

And – the centrifugal regulator,

In – the vacuum regulator

During check at the stand (the distributor of ignition is removed) values need to be reduced by a half. During check of the distributor installed in the car it is necessary to add the size of an initial corner of an advancing of ignition.

Ignition coil


Brand
Bosch or Ducellier
Winding resistance:
  – primary
0,7 Ohm
  – secondary
6,6 kOhm

Spark plugs

Spark plugs have conical consolidation (have no laying).

Brand and type: Champion C7YCX or Eyquem FC 62 LS.

TIGHTENING MOMENTS

XU5, XU7 and XU9 engines
Head of the block of cylinders:
  – 1 stage
tightening moment of 60 Nanometers
  – 2nd stage
unscrewing, and then tightening moment of 20 Nanometers
  – 3rd stage:
     • Torx bolts
tightening on a corner 300 °
     • six-sided bolts
tightening on a corner 120 °
Casing of a gear belt
8 Nanometer
Bolt of a pulley of the mechanism of a tension of a gear belt
20 Nanometer
Oil pump
13 Nanometer
Cover of the bearing of the lower head of a rod:
  – 1 stage
tightening moment of 40 Nanometers
  – 2nd stage
unscrewing, and then tightening moment of 20 Nanometers
  – 3rd stage
tightening on a corner 70 °
Forward consolidation
16 Nanometer
Covers of radical bearings
52,5 Nanometer
Side bolts of covers of radical bearings
22 Nanometer
Pulley of a bent shaft:
120 Nanometer
Flywheel
50 Nanometer
Camshaft pulley
80 Nanometer
Camshaft bearings
15 Nanometer
Oil pallet
20 Nanometer
Cover of a head of the block of cylinders
10 Nanometer
Spark plugs
17,5 Nanometer

XU10 engines

Cover of a head of the block of cylinders
10 Nanometer
Casing of a gear belt
8 Nanometer
Pulley of a bent shaft
110 Nanometer
Mechanism of a tension of a gear belt
20 Nanometer
Bolts of fastening of a head of the cylinder:
  – 1 stage
tightening moment of 35 Nanometers
  – 2nd stage
tightening moment of 70 Nanometers
  – 3rd stage
tightening on a corner 160 °
Oil pallet
16 Nanometer
Oil pump
13 Nanometer
Cover of the bearing of the lower head of a rod:
  – 1 stage
tightening moment of 40 Nanometers
  – 2nd stage
unscrewing, and then tightening moment of 20 Nanometers
  – 3rd stage
tightening on a corner 70 °


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