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
   - 3.2. Diesel engines
      3.2.1. Technical characteristic
      + 3.2.2. Adjustments of the engine
      3.2.3. Removal and installation of the fuel pump of high pressure
      3.2.4. Installation of the fuel pump of high pressure BOSCH
      3.2.5. Installation of the fuel pump of high pressure Roto Diesel
      3.2.6. Removal of water from the fuel filter
      3.2.7. Removal of air from fuel system
      3.2.8. Removal and installation of a nozzle
      3.2.9. Check electrically the operated engine stop valve
      3.2.10. Adjustment of the pump Bosch
      3.2.11. Adjustment of the pump Roto Diesel
      3.2.12. Removal and installation of a turbocompressor
      + 3.2.13. The repair which is not demanding removal of the engine
      3.2.14. Removal of the engine
      3.2.15. Installation of the engine
      3.2.16. Dismantling of the engine
      3.2.17. Assembly of the engine
      3.2.18. Oil pump
      + 3.2.19. Cooling system
      3.2.20. System of production of exhaust gases
   + 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

3.2.1. Technical characteristic

GENERAL INFORMATION

ENGINES

Head of the block of cylinders

The head is made of aluminum alloy and has the inserted saddles of valves. In the top part of a head the camshaft is installed.

Nominal height	157,40 – 157,75 mm (measurement is carried out between the surface of connection of a head and a surface on the diameter of condensing camshaft ring) (see rice. Place of measurement of height of a head of the block of cylinders and sign of a repolished head)
Maximum admission of not planeness of the lower surface of a head	0,07 mm
Regrinding	at most 0,4 mm concerning the measured nominal height
Prevention After a pereshlifovyvaniye of the lower surface of a head it is necessary to perform the following operations: – grinding of nests of valves; – replacement of vortex cameras by cameras of the corresponding sizes and their correct installation; – installation under springs of valves of compensation laying 0,4 mm thick. The repolished head is designated by the letter R which is beaten out in the appropriate place of a head (see rice. Place of measurement of height of a head of the block of cylinders and sign of a repolished head).
Facet of inlet valves	0,9 – 1,45 mm
Facet of final valves	0,5 – 1,05 mm
Vystupaniye of pistons over the block of cylinders	0 – 0,03 mm

Vortex cameras

In engines pistons according to the license Ricardo Comet V are used.

Vystupaniye of vortex cameras	0 – 0,03 mm
Diameter of an adjusting ball	3,0 mm
Size of the vortex camera:
– diameter of a flange:
• the sizes are nominal	32,05 – 32,25 mm
• 1st size repair	32,45 mm
• 2nd size repair	32,65 mm
• admission	+0,099 - 0,060 mm
– flange thickness:
• the sizes are nominal	4,0 – 4,1 mm
• 1st size repair	4,2 mm
• 2nd size repair	4,3 mm
• admission	+0,020 - 0,025 mm
– diameter of boring of a head:
• the sizes are nominal	32,0 – 32,2 mm
• 1st size repair	32,4 mm
• 2nd size repair	32,6 mm
• admission	+0,039 0 mm
– depth of boring of a head:
• the sizes are nominal	3,9 – 4,0 mm
• 1-й size repair	4,1 mm
• 2nd size repair	4,2 mm
• admission	+0,02 - 0,04 mm

Guides of valves

Guides of valves are made of brass. As spare parts, guides are delivered the repair sizes.

The sizes of the directing valves (see rice. The sizes of the directing plugs of valves):
– diameter of boring in a head (f):
• the sizes are nominal	14,02 – 14,13 mm
• 1st size repair	14,29 mm
• 2nd size repair	14,59 mm
• admission	0 - 0,011 mm
– external diameter of the directing plug (g):
• the sizes are nominal	13,981 – 14,051 mm
• 1st size repair	14,211 mm
• 2nd size repair	14,511 mm
• admission	+0,032 0 mm
– length of the directing plug (h)	52 mm
• the sizes are nominal	52 mm
• admission	± 0,25 mm
– internal diameter of the directing plug (k):
• the sizes are nominal	8,02 mm
• admission	0 +0,2 mm
– distance between the surface of laying of a head of the block of cylinders and a guide (j):
• the sizes are nominal	36,50 mm
• admission	± 0,50 mm

Saddles of valves

Pig-iron saddles of valves plug-in. The corner of a prileganiye of saddles of inlet and final valves makes 90 °.

Valves

The valves fixed in a head are put in action by the camshaft through pushers. Rods of inlet valves are chromeplated.

Adjustment of a working gap is carried out by installation on pushers of the corresponding adjusting plates.

Thickness of adjusting plates is given in the characteristic of pushers.

The sizes of saddles of inlet valves (see rice. Sizes of saddles of valves):
– external diameter of a saddle (and):
• the sizes are nominal	40,161 – 40,361 mm
• 1st size repair	40,461 mm
• 2nd size repair	40,661 mm
• admission	0 - 0,025 mm
– diameter of boring in a head (b):
• the sizes are nominal	40,0 – 40,2 mm
• 1st size repair	40,3 mm
• 2nd size repair	40,5 mm
• admission	0 - 0,025 mm
– saddle height (c):
• the sizes are nominal	6,25 – 6,45 mm
• 1st size repair	6,45 mm
• 2nd size repair	6,45 mm
• admission	0 - 0,1 mm
– boring depth in a head (d):
• the sizes are nominal	8,267 – 8,467 mm
• 1st size repair	8,467 mm
• 2nd size repair	8,467 mm
• admission	± 0,015 mm
The sizes of saddles of final valves (see rice. Sizes of saddles of valves):
– external diameter of a saddle (and):
• the sizes are nominal	34,137 – 34,337 mm
• 1st size repair	34,467 mm
• 2nd size repair	34,637 mm
• admission	0 - 0,025 mm
– diameter of boring in a head (b):
• the sizes are nominal	34,0 – 34,2 mm
• 1st size repair	34,3 mm
• 2nd size repair	34,5 mm
• admission	± 0,025 mm
– saddle height (c):
• the sizes are nominal	6,05 – 6,25 mm
• 1st size repair	6,25 mm
• 2nd size repair	6,45 mm
• admission	0 – 0,1 mm
– boring depth in a head (d):
• the sizes are nominal	8,15 – 8,35 mm
• 1st size repair	8,35 mm
• 2nd size repair	8,35 mm
• admission	± 0,015 mm
Sizes of valves:
– inlet valve:
• length	112,2 mm
• diameter of a rod	8,005 mm
• diameter of a plate	38,5 mm
• prileganiye corner	90 °
• facet	0,5 – 1,05 mm
– final valve:
• diameter of a rod	7,985 mm
• diameter of a plate	33,0 mm
• prileganiye corner	90 °
• facet	0,9 – 1,45 mm
Valves THOSE XUD 9 engines (valves special, they have an additional sealant of a rod):
– inlet valve:
• length	112,4 mm
• diameter of a rod	8,0 mm
• diameter of a plate	38,5 mm
• prileganiye corner	90 °
• facet	0,5 – 1,05 mm
– final valve:
• length	109,55 mm
• diameter of a rod	8,0 mm
• diameter of a plate	33,0 mm
• prileganiye corner	90 °
• facet	0,9 – 1,45 mm
Working gap of valves (at the cold engine):
– inlet valve	0,15 mm
– final valve	0,30 mm
– admission	± 0,04 mm

Springs of valves

About two springs on the valve are used. Inlet and final valves have identical springs.

The spring is internal:
– diameter	19,5 mm
– height / under loading	38,4 mm / 85 N
– height / under loading	29,3 mm / 237 N
The spring is external:
– diameter	29 mm
– height / under loading	42,4 mm / 180 N
– height / under loading	33,3 mm / 450 N

Pushers

Nests of pushers are executed directly in a head. The working gap of the valve is regulated by placement on a pusher of an adjusting plate of the corresponding sizes.

Diameter of plates	13,5 mm
Thickness of plates (mm)	1,650, 1,725, 1,800, 1,900, 1,975, 2,050, 2,125, 2,225 to 3,025 everyone 0,025, 3,100, 3,175, 3,250, 3,325 to 4,000 everyone 0,025

Laying of a head of the block of cylinders

Brand	Reinz
Designation	on laying two types of the signs designating their mission and thickness are executed (see rice. Identification of laying of a head of the block of cylinders)
The designation defining the engine (and, see rice. Identification of laying of a head of the block of cylinders):
– XUD 9	without cut
– XUD 7TE	2 cuts
The designation determining thickness (b, see rice. Identification of laying of a head of the block of cylinders):
– XUD 9	2 cuts of 1,61 mm
– XUD 7TE	2 cuts of 1,65 mm
– XUD 7TE	3 cuts of 1,80 mm
In THOSE XUD 9 engines special laying of a head of the block of cylinders is applied. Identification – 3 cuts executed under cuts of designation of thickness.

Block of cylinders of the engine

The block of cylinders of the engine is manufactured of cast iron. Cylinders are executed directly in the block. In XUD 7TE engines cooling liquid circulates between cylinders, in XUD 9 engines between cylinders special channels are executed.

Height of the block of cylinders of the THAT XUD 9 engine	303 mm
Diameter of cylinders:
– XUD 7TE engine:
• 1st size nominal	80,000 – 80,018 mm (without designation)
• 2nd size nominal	80,030 – 80,048 mm (designation A1)
• 1st size repair	80,200 – 80, 218 mm (designation R1)
• 2nd size repair	80,500 – 80,518 mm (designation R2)
• 3rd size repair	80,800 – 80,818 mm (designation R3)
– XUD 9 engine:
• 1st size nominal	83,000 – 83,018 mm (without designation)
• 2nd size nominal	83,030 – 83,048 mm (designation A1)
• 1st size repair	83,200 – 83,218 mm (designation R1)
• 2nd size repair	83,500 – 83,518 mm (designation R2)
• 3rd size repair	83,800 – 83,818 mm (designation R3)

KRIVOSHIPNO-SHATUNNYY MECHANISM

Bent shaft

The bent shaft is made of spheroidal cast iron, leans on five radical bearings and has counterbalances. Radical and conrod necks are subjected to a running in and induction training.

Diameter of radical necks:
– the size is nominal	59,981 – 60,000 mm
– 1st size repair	59,681 – 59,700 mm
Diameter of conrod necks:
– the size is nominal	49,984 to 50,000 mm
– 1st size repair	49,684 to 49,700 mm
Width of a neck No. 2 of the XUD 9 engine:
– the size is nominal	26,60 to 26,65 mm
– 1st size repair	26,80 to 26,85 mm
– 2nd size repair	26,90 to 26,95 mm
– 3rd size repair	27,00 to 27,05 mm
Width of a neck No. 2 of the XUD 7TE engine:
– the size is nominal	25,70 to 25,75 mm
– 1st size repair	25,90 to 25,95 mm
– 2nd size repair	26,00 to 26,05 mm
– 3rd size repair	27,00 to 27,05 mm
Thickness of persistent half rings of XUD 9 engines:
– the size is nominal	2,305 ± 0,025 mm
– 1st size repair	2,405 ± 0,025 mm
– 2nd size repair	2,455 ± 0,025 mm
– 3rd size repair	2,505 ± 0,025 mm
Thickness of persistent half rings of XUD 7TE engines:
– the size is nominal	1,855 ± 0,025 mm
– 1st size repair	1,955 ± 0,025 mm
– 2nd size repair	2,005 ± 0,025 mm
– 3rd size repair	2,055 ± 0,025 mm
Sealing ring from the camshaft drive	42 x 62 x 8 mm
Sealing ring from a flywheel	90 x 110 x 10 mm
Axial gap of a bent shaft	0,07 to 0,32 mm
Persistent half rings are placed on the radical bearing No. 2.
Inserts of radical bearings:
– nominal thickness	1,842 ± 0,003 mm
– repair size	1,992 ± 0,003 mm

Flywheel

The flywheel is fixed by eight bolts.

Number of teeths of a gear wreath: 136.

Rods

Rods are shaped from steel.

Internal diameter of the top head of a rod (for boring after fixing):
– XUD 9 engine	25,007 to 25,020 mm
– THAT XUD 7 engine	28,007 to 28,020 mm
Distance between rod axes	145 ± 0,025 mm
Inserts of rods:
– nominal thickness	1,827 ± 0,003 mm
– repair size	1,977 ± 0,003 mm

Pistons

Pistons are manufactured of alloy of aluminum and silicon. They are connected to rods by means of the fingers recorded by two spring rings.

Diameter of pistons:
– XUD 7TE engine: *
• 1st size nominal	79,93 ± 0,009 mm (without designation)
• 2nd size nominal	79,96 ± 0,009 mm (designation A1)
• 1st size repair	80,13 ± 0,009 mm (designation R1)
• 2nd size repair	80,43 ± 0,009 mm (designation R2)
• 3rd size repair	80,73 ± 0,009 mm (designation R3)
– XUD 9 engine: *
• 1st size nominal	82,93 ± 0,009 mm (without designation)
• 2nd size nominal	82,96 ± 0,009 mm (designation A1)
• 1st size repair	83,13 ± 0,009 mm (designation R1)
• 2nd size repair	83,43 ± 0,009 mm (designation R2)
• 3rd size repair	83,73 ± 0,009 mm (designation R3)

* Diameter is measured at distance of 25 mm (for XUD 9 engines) and 2,5 mm (for THOSE XUD 7 engines) from the piston bottom perpendicularly to a finger axis.

Piston fingers

The piston finger is fixed in a rod and the piston. It is recorded by means of two spring rings.

Diameter:
– XUD 9 engine	25 mm
– THAT XUD 7 engine	28 mm
Finger gap in the piston	0,003 mm to 0,014 mm

Piston rings

Each piston has three piston rings.

Gap in the lock:
– compression ring	0,20 to 0,40 mm
– sealing ring	0,15 to 0,35 mm
– oil scraper ring	0,10 to 0,35 mm
Thickness of a compression ring in THOSE XUD 9 engines	3,5 mm

SYSTEM OF GAS DISTRIBUTION

The camshaft placed in a head which rotates in three bearings and is put in action by a gear belt operates work of system of gas distribution. Valves are put in action by the camshaft through the pushers supplied with adjusting plates.

Camshaft

The pig-iron camshaft is fixed in a head, rotates in three bearings and is put in action by a gear belt.

The camshaft of the THAT XUD 7 engine has special camber between cams of the 1st cylinder.

Diameter of bearings:
– bearing No. 1	27,5 mm (from a flywheel)
– bearing No. 2	28,00 mm
– bearing No. 3	28,5 mm
Some camshafts have bearings with a diameter increased by 0,5 mm. Such camshafts are respectively designated: between cams of the 1st cylinder in yellow color the ring is drawn. Heads in which bearings of the camshaft have diameter increased by 0,5 mm are designated by the beaten-out figure 1.
Axial gap	0,025 to 1,114 mm
In that part of the camshaft which has to be from the drive there is an inscription "DIST".

Theoretical phases of distribution with a zero control gap of valves

THAT engine XUD 9, XUD 9:
– OZD advancing	44 °30'
– ZZD delay	83 °30'
– OZW advancing	89 °30'
– ZZW delay	46 °30'
XUD 7TE engine:
– OZD advancing	51 °30'
– ZZD delay	76 °30'
– OZW advancing	89 °30'
– ZZW delay	46 °30'

OZD, ZZD – respectively opening and closing of the inlet valve.
OZW, ZZW – respectively opening and closing of the final valve.

Gear belt

Brand: Uniroyal Powergrip or Pirelli Isoran.

The tension of a belt provides the roller tension device.

Frequency of replacement of a belt: each 75000 km.

LUBRICATION SYSTEM

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

The heat exchanger oil-cooling liquid is present at all types of engines. Nozzles of dispersion of oil on the bottoms of pistons, and also a contour of greasing of a turbo-supercharging are in the THAT XUD 7 engine.

Oil pump

Type	gear
Oil pressure:
– idling	0,2 MPas
– at 2000 rpm	0,34 to 0,37 MPas
– at 4000 rpm	0,38 to 0,50 MPas
Pressure of opening of the reducing valve	0,40 MPas
Pressure sensor:
– switching off of a control bulb	0,08 MPas
– fire of a control bulb	0,058 to 0,044 MPas

Oil filter

The oil filter with the replaced element has the valve (0,1 MPas) connected bypass.

Brand and type: Purflux LS 468 A or Mann 674 0258.035.

Engine oil

The recommended type	API SF/CD, MIL-L-2104 C or 46 152, CCMC PD1, SAE 10W/40, 15W/30 or 15W/40
Amount of oil	4,5 ^dm3 + 0,5 ^dm3 (oil filter)
Frequency of replacement of oil together with the filter	each 10 000 km

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, the broad tank connected to a radiator, two fans supplied with electric motors, the thermostat and the sensor of temperature.

The contour of cooling provides fuel heating (in some versions).

Pump of cooling liquid

The centrifugal pump of cooling liquid is fixed in the case and is put in action by a gear belt.

Radiator

The radiator has a core of a horizontal current.

Brand: Chausson.

Thermostat

Brand: Calorstat.

Temperature began opening
88 °C

Temperature of full opening
100 °C

Fans

Brand: AOR.

Before a radiator two fans supplied with electric motors are installed.

Functioning: simultaneous, with two speeds operated by the two-level sensor of temperature.

Temperature of inclusion and shutdown:
– 1 speed:
• 93/88 °C	in XUD 7 engines of TE and XUD 9 with number of the chassis to 8 274 818
• 97/92 °C	in XUD 9 engines with number of the chassis from 8 274 819
– 2nd speed:
• 97/92 °C	in XUD 7 engines of TE and XUD 9 with number of the chassis to 8 274 818
• 101/96 °C	in XUD 9 engines with number of the chassis from 8 274 819

Temperature sensor

It is the sensor of the increased temperature of cooling liquid.

Temperature of inclusion of a control bulb: 105 °C.

Cooling liquid

The recommended type	mix of water and nonfreezing liquid in a proportion 1:1 (to -17 °C)
Quantity	7,8 l
Frequency of replacement of cooling liquid and washing of a contour of cooling	each 2 years

POWER SUPPLY SYSTEM

Supply of fuel the distributive pump of high pressure and a nozzle, and in THOSE XUD 7 engines – in addition provide a turbocompressor.

Air filter

Look	dry filter
Brand and type	Permabit FA 1526 or Mann

Fuel tank

Volume	70 l
Fuel	diesel

System of injection Bosch

XUD 7TE engine:
– type of the fuel pump	EP-VE 4/8F 2150 R 316
– nozzle	DNOSD 289
– type	KCA 17 S 42
– adjustment	13,0 to 13.5 MPas
– filter	Purflux
– initial warming up:
• glow plugs	Bosch 0250 201 01, Beru 0100 22 133
• resistance at a temperature of 20 °C	0,3 to 0,4 Ohms
• heating time	8 sec.
– adjustment:
• installation of the pump	Before VMT the piston No. 4 for raising of a porshneraspredelitel 0 ± 0,03 mm
• dynamic installation	at 750 to 800 rpm 14 °
• idling speed	750 to 800 rpm
• the increased idling speed	950 ± 50 rpm
XUD 9 engine:
– type of the fuel pump	EP-VE 419F 2300 R
– nozzle	2722-2 DNOSD 287+
– type	KCA 17 S 42
– adjustment	13,0 to 13.5 MPas
– filter	Purflux
– initial warming up:
• glow plugs	Bosch 0250 201 01, Beru 0100 22 133
• resistance at a temperature of 20 °C	0,3 to 0,4 Ohms
• heating time	8 sec.
– adjustment:
• installation of the pump	Before VMT the piston No. 4 for raising of a porshneraspredelitel 0,9 ± 0,03 mm
• dynamic installation	at 750 to 800 rpm 15 ° ± 1 °
• idling speed	750 to 800 rpm
• the increased idling speed	950 ± 50 rpm

System of injection Roto Diesel

XUD 7TE engine:
– type of the fuel pump	DPCR 8443 B 451 C or 452 C
– nozzle	RDNOSD 6862C
– type	LCR 67307
– adjustment	13,0 ± 0,5 MRA
– filter	Roto Diesel
– element	CAV
– initial warming up:
• glow plugs	Bosch 0250 201 01900, Beru 0100 22 133
• resistance at a temperature of 20 °C	0,3 to 0,4 Ohms
• heating time	8 sec.
– adjustment:
• installation of the pump	Before VMT the piston No. 4 for measured by the indicator of hour type of raising of the piston of the pump of 0,01 mm fixed in the pump
• dynamic installation *	9 °
• dynamic installation at 750 – 800 rpm	15 °
• idling speed	750 – 800 rpm
• the increased idling speed	950 ± 50 rpm
XUD 9 engine:
– type of the fuel pump	DPCR 8443 B 380 A or 381 B
– nozzle	RDNOSD 6751C
– type	LCR 67307
– adjustment	11,5 ± 0,5 MRA
– filter	Roto Diesel
– slement	CAV
– initial warming up:
• glow plugs	Bosch 0250 201 01900, Beru 0100 22 133
• resistance at a temperature of 20 °C	0,3 to 0,4 Ohms
• heating time	8 sec.
– adjustment:
• installation of the pump	Before VMT the piston No. 4 for measured by the indicator of hour type of raising of the piston of the pump of 0,01 mm fixed in the pump
• dynamic installation *	15 °
• dynamic installation at 750 – 800 rpm	15 °
• idling speed	750 – 800 rpm
• the increased idling speed	950 ± 50 rpm

* Value for bystry check by means of the special diagnostic device.

The fuel pump of high pressure on THOSE XUD 9 engines

Brand and type	Bosch VER 445
Installation is static	piston stroke of the distributor of 0,66 mm in the provision of VMT of the cylinder No. 4
Installation dynamic (the engine is heated-up)	11 ° ± 1 ° at 800 rpm
Speed idling:
– without conditioning	750 ± 50 rpm
– with conditioning	800 ± 50 rpm
The maximum speed without loading	5100 ± 80 rpm
Speed idling with the increased speed (the engine cold)	950 ± 50 rpm

Set of nozzles on THOSE XUD 9 engines

Brand and type	Bosch KCA 17S42
Nozzle sprays on THOSE XUD 9 engines:
– brand and type	Bosch DNOSD 299
Pressure of opening of a nozzle	17,5 MPas

Turbocompressor

The turbocompressor provides additional air supply in the engine. It has a radiator of air which warms up the air given to the engine.

Brand and type	Garrett T2 or KKK K 14
Compression pressure:
– at 2000 rpm	70 ± 5 kPa
– at 4300 rpm	85 ± 5 kPa
Turbocompressor on THOSE XUD 9 engines
Brand and type	Garrett T2 or KKK K14
Compression pressure:
– at 2000 rpm	70 ± 5 kPa
– at 3000 rpm	100 ± 5 kPa

TIGHTENING MOMENTS

Head of the block of cylinders (new bolts and linings):
– stage 1	30 Nanometer
– stage 2	70 Nanometer
– stage 3	To tighten on a corner 120 °
Consolidation frame plate from the distributive drive	15 Nanometer
Fastening of the oil pallet to the block	20 Nanometer
Covers of bearings of the camshaft	15 – 17,5 Nanometers
Covers of rods:
– 1 stage	screwing up moment of 40 Nanometers
– 2nd stage	weakening of fastening of nuts
– 3rd stage	screwing up moment of 20 Nanometers
– 4th stage	dovorachivaniye on a corner 70 °
Fastening of covers of radical bearings to the block of cylinders	70 Nanometer
Cover of a head of the block of cylinders	10 Nanometer
Fastening of a nozzle to a head of the block of cylinders	90 Nanometer
Camshaft pulley	35 to 40 Nanometers
Pulley of the fuel pump of high pressure	50 Nanometer
Pulley of a bent shaft	40 Nanometer +60 °
Subpressure pump pulley	35 Nanometer
Tension device of a gear belt	15 Nanometer
Oil heat exchanger	65 Nanometer
Flywheel	50 Nanometer
Pump of cooling liquid	15 Nanometer
Oil pump	20 Nanometer
Left arm of the engine:
– side nuts	17,5 Nanometer
– central nut	35 Nanometer
Right arm of the engine:
– a nut about a body	27,5 Nanometer
Lower arm of the engine:
– a nut about a body	55 Nanometer
– a nut about the engine	35 Nanometer

CHANGES IN XUD 7TE, XUD 9 AND XUD 9TE ENGINES

Laying of a head of the block of cylinders

Some engines have the block of cylinders designated by a symbol "V" which is characterized by a ledge of pistons over edge of cylinders, equal or big 0,84 mm. In them it is necessary to establish surely laying of a head 1,83 mm thick which is designated by four cuts.

Springs of valves

Since December, 1988 valves are equipped only with one spring which replaced knot from two springs.

Diameter	29 mm
Height under load of 320 N	42,4 mm
Height under load of 550 N	33,0 mm
Diameter of a wire	3,8 mm
Color of designation	blue, colors of "a sea wave"

Saddles and final valves

For unification XUD 7T and XUD 9 engines are equipped with the same nests of final valves, as well as in the THAT XUD 9 engine.

Application of this modification led to the fact that deepening of a nest of the final valve concerning the surface of connection of a head of the block of cylinders became equal 2,5 mm instead of former 2 mm, and also the plate thickness of the valve for preservation of former extent of compression respectively increased.

Heads of new type are identified by means of openings with a diameter of 9 mm (instead of openings with a diameter of 7 mm) in the ledges located over glow plugs.

Since January, 1992 the XUD 9 engine with the modified head of the block of cylinders has the designation XUD 9A/L.

Components of both types of heads of the block of cylinders are not interchanged.

System of gas distribution

Engines were gradually equipped with gear belts from the materials HSN (Hydrogene Sature Nitrile) which are characterized by the increased stability on influence of oils and the increased temperature.

These belts have the designation HSN.

In case of replacement of a belt it is necessary to establish a HSN belt surely.

Brand and type: Pirelli 136 RPP 254 or Gates HTD 58136x1.

Since January, 1990 in cars with system of steering without hydraulic booster diaphragm vacuum pumps are gradually replaced with bladed rotational pumps with the drive directly from the camshaft. As a result of this modification the camshaft was changed – its length for providing the drive of the pump of low pressure was increased.

Starting with serial number 70 491 894 the vacuum pump on the end of the camshaft is also installed in cars with system of steering with the hydraulic booster.

In cars with conditioning the former decision is left.

Since model of 1993 the thermostat 89 ° is replaced with the thermostat 83 °.

Since model of 1993 former sensors of temperature are replaced on new with the following characteristics:

1st step:
– without conditioning	92,5 °C
– with conditioning	90 °C
2nd step:
– without conditioning	97,5 °C
– with conditioning	101 °C

Turbocompressor

Starting with numbers of engines 1CV33-49714, 1CV35-67544, 1CV47-77513, 1CV48-20272, 1CV87-2457 fastening of a returnable oil pipeline on a turbocompressor was changed for improvement of tightness of connection. The bringing oil pipeline was also subjected to change.

Separate parts of both types of fastening are not interchanged.

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