Mercedes-Benz:: G-class W463:: Engine

4. Engine

Specifications

The parameters used at implementation of the procedures described in the present Chapter are specified below. Detailed standard data it is possible to receive HUNDRED Mercedes-Benzs at company car repair shops. Separate characteristics are provided also in the text of the Head and in case of obligation of their performance are highlighted in bold type.

Only the values typical for all engines of the considered series are listed below.

Petrol models

General parameters

Engine type
M112	The V-shaped, 6-cylinder, DOHC, with water cooling, the GRM chain drive and microprocessor management
M113	The V-shaped, 8-cylinder, DOHC, with water cooling, the GRM chain drive and microprocessor management
Model range of application
G320 (463.945)	112.945
G500 (463.249)	113.962
G55 AMG (463.246)	113.982
Engine displacement, l
M112	3.2
M113
113.962	5.0
113.982	5.5
The number of valves on the cylinder	3
Extent of compression	10.0:1
Pressure of a compression, atm
Nominal rate	12 ÷ 14
Minimum admissible value	9.0
The maximum admissible difference in indications between cylinders	1.5
Operating procedure of cylinders
M112	1-5-3-6-2-4
M113	1-5-4-8-6-3-7-2
Valvate gaps	Automatic adjustment, - hydrocompensators

Head of cylinders

Casting

Classification of laying of heads of cylinders for engines

Obozna-
cheniye
dviga of a tel

Volume
цилинд ditch, l

Diameter tsilind-
ditch (C), mm

Marking
heads (А/В)

112.945

3.2

92.00

And

1120160320/0420

113.962

5.0

97.00

And

1130100220/0320

113.982

5.5

Data are absent

Data are absent

Data are absent

Sizes of bolts of fastening of a head of cylinders

Carving M11

Length (L), mm

New bolt

141.5

Extreme admissible value

144.5

The directing plugs of valves

The scheme of landing of the directing plugs of valves


1 — the Directing plug of the inlet valve 2 — the Directing plug of the final valve	And — the Landing depth of the plug L — the Full length of the plug

The directing plugs of valves

Diameter of a nest under landing of the directing plug of the valve, mm
Standard size	12.500 ÷ 12.511
Standard size I (blue)	12.520 ÷ 12.531
Repair size I (red)	12.700 ÷ 12.711
The repair size is II (yellow)	13.100 ÷ 13.111
Outer diameter of the directing plug of the valve, mm
Standard size	12.540 ÷ 12.551
Standard size I (blue)	12.560 ÷ 12.571
Repair size I (red)	12.740 ÷ 12.751
The repair size is II (yellow)	13.140 ÷ 13.151
Length of the directing plug of the valve, mm
Inlet and final valves	50
Geometrical characteristics of the directing plug, mm	And 14.3 ± 0.2

Details of installation and geometrical parameters of valvate saddles (engines of series 112 and 113)


D1 — the Nest under landing of a saddle of the inlet valve D2 — the Nest under landing of a saddle of the final valve	a — the Working bevel angle of a facet b — the Top adjustment corner g — Nizhny Novgorod an adjustment corner And — Width of a working facet of a saddle

Saddles of valves

Engines of series 112 and 113

And — Diameter of a core
In — Length
With — plate Height
D — Diameter of a plate
a — a facet Tilt angle

Geometrical parameters of valves (see сопр. illustration)
D, mm
M112
Inlet valves	36 ± 0.1
Final valves	41 ± 0.1
M113
Inlet valves	38 ± 0.1
Final valves	43 ± 0.1
With (for the new valve), mm
Inlet valves	1.2
Final valves	1.6
And, mm
Inlet valves	6.975
Final valves	6.970
In, mm
M112
Inlet valves	119.40 ± 0.2
Final valves	122.25 ± 0.2
M113
Inlet valves	119.10 ± 0.2
Final valves	121.80 ± 0.2

Block of cylinders

Case

Diameter of cylinders, mm
M112
Standard size
Marking of X	89.900 ÷ 89.915
Marking D	89.950 ÷ 89.965
Repair size	90.150 ÷ 90.165
M113
Standard size
Marking of X	97.000 ÷ 97.015
Marking D	97.050 ÷ 97.065
Repair size	97.250 ÷ 97.265

Bent shaft

The sizes of bolts of fastening of covers of conrod bearings (see сопр. illustration)
Carving	M8x1
Length, mm
New bolt	47
Extreme admissible value	47.6

Designations of persistent half rings of a bent shaft

Block
cylinders

Pin of a bent shaft

Persistent half rings

Size of axial
side play of a shaft, mm

Obozn.

Inscription

Obozn.

Brands -
rovka

Code

N

O

N

Warranty and digital code

0,10 ÷ 0,266

Code

N1

1

N1

Warranty and digital code

0,10 ÷ 0,266

Balancing shaft (series 112)

Extreme admissible length of a bolt of fastening of a counterbalance, mm

50.7

Conrod and piston assemblies

Diameter of pistons, mm
M112
Standard size
Marking of X	89.872 ÷ 89.902
Marking D	89.872 ÷ 89.902
Repair size	90.122 ÷ 90.152
M113
Standard size
Marking of X	96.972 ÷ 97.000
Marking D	97.022 ÷ 97.050
Repair size	97.222 ÷ 97.250
Maximum admissible size of a side play of pistons, mm	0.043
Size of a radial side play of conrod bearings (new bearings), mm	0.026 ÷ 0.054

Axial side play of rods

Color marking of an insert

Size of an axial rod, mm

Top inserts (rods)

Lower inserts (covers)

Yellow

Yellow

0,026 ÷ 0,054

Blue

Red

0,026 ÷ 0,054

Red

Blue

0,026 ÷ 0,054

Sizes of piston rings, mm

Compression rings

M112 83.2x1.5x3.1

M113

113.982

97.0x1.2x3.5

113.962

97.0x1.5x3.1

Oil scraper ring

M112 83.2x3.5x3.5

M113

113.982

97.0x1.5x4.0

113.962

97.0x3.5x3.5

Efforts of tightening of threaded connections, Nanometer

Drain stopper of the pallet of a case of the engine (M14)	30/32
Cover of a casing of an oil filter	25
Self-cut bolt of fastening of a natyazhitel to a GRM drive cover
The carving is not cut	35
The carving is cut	25
Bolts of fastening of a damper of a natyazhitel of a belt
drive of auxiliary units
To a natyazhitel	25
To the water pump	35
Bolts of fastening of a natyazhitel	25
Nipple knot of connection of the giving fuel pipe to the fuel highway	38
Flange connection of a reception pipe of system of production of the fulfilled gases with a final collector	20
Bolts of fastening of a starter to an engine case	42
Bolts of fastening of pillows of forward support to a stretcher	35
Bolts of M8 of fastening of the hydrotransformer to a driving disk	42
Bolts of fastening of AT to the engine
M10x40 and M10x90	40
M12	-
Knots of fastening of hydraulic lines to the steering pump
Pressure head line
M14x1.5	-
M16x1.5	45
Returnable line	2
Screws of fastening of the K/V compressor to a basic arm	20
Bolts of fastening of a cover of the GRMK drive to the block and head of cylinders	20
Bolt of M8x78 of fastening of the directing pulley of a belt of the K/V drive and auxiliary агрегатовк to a GRM drive cover	68
Bolts of fastening of the water pump
Self-cut
M6
The carving is not cut	14
The carving is cut	10
M8
The carving is not cut	35
The carving is cut	25
Standard (M7)	10
Fastening of a pulley of the drive of the water pump	10
Bolts of fastening of a casing of the thermostat (M6)	10
Bolts of fastening of the steering pump
Self-cut
The carving is not cut	35
The carving is cut	20
Standard	25
Bolts of fastening of the inlet pipeline to heads of cylinders (M8)	20
Natyazhitel of a chain in a GRM drive cover	80
Bolt of fastening of asterisks of camshafts (M12x45)
Stage 1	50
Stage 2	To hold on on a corner 90 °
Hall's sensor of the camshaft in a head of cylinders	8
Bolts of fastening of bridges of bearings of camshafts to golovkamkhilindrov
M7x45
Stage 1	15
Stage 2	-
M7x84
Stage 1	10
Stage 2	To hold on on a corner 90 °
Bolts of fastening of asterisks of camshafts (M12x45)
Stage 1	50
Stage 2	To hold on on a corner 90 °
Bolts of fastening of a head of cylinders
To the engine block (internal TORX)
Stage 1	10
Stage 2	30
Stage 3	To hold on on a corner 90 °
Stage 4	To hold on on a corner 90 °
To a GRM drive cover	20
Bolts of fastening of covers of heads of cylinders	10
Nut of fastening of a connecting tube to the EGR valve	40
Flange connection of a reception pipe of system of production of the fulfilled gases with a final collector	20
Nuts of fastening of a final collector	16
Bolts of fastening of a face cover of the engine	10
Central bolt of fastening of a damper of tortional fluctuations
Stage 1	200
Stage 2	To hold on on a corner 95 °
Bolts of fastening of a driving disk to a bent shaft
Stage 1	45
Stage 2	To hold on on a corner 90 °
Bolts of fastening of covers of radical bearings
M8
Except side
Stage 1	20
Stage 2	To hold on on a corner 90 °
Side	30
M10
Stage 1	30
Stage 2	To hold on on a corner 90 °
Bolts of fastening of covers of the lower heads of rods
Stage 1	5
Stage 2	25
Stage 3	To hold on on a corner 90 °
Bolt of M7x16.5 of fastening of a lock plate to a balancing shaft (M112)	15
Bolt of fastening of a counterbalance to a balancing shaft (M112)
Stage 1	20
Stage 2	To hold on on a corner 90 °
Bolts/nut of fastening of a pillow of a back support of a suspension bracket of the power unit
To a transmission case	35
To a cross beam	35
Nuts of fastening of a cross beam to a car frame	35
Bolts of fastening of the left and right side support of a suspension bracket of the power unit to an engine case
Stage 1	20
Stage 2	To hold on on a corner 90 °
Bolts of fastening of pillows of forward support of a suspension bracket of the power unit
To a stretcher	35
To a support arm	65
Cover of a casing of an oil filter	25
Bolts of fastening of a casing of assembly of an oil filter	70
Fastening of the liquid heat exchanger of an oil filter	11
Drain stopper of the pallet of a case (M14)	30
Self-cut bolts of fastening of the lower section of the pallet of a case to top
The carving is not cut	14
The carving is cut	10
Bolts of fastening of the top section of the pallet of a case to the block of cylinders
M6	9
M8	20
Bolts of fastening of the sensor of level of oil
to the top section of the pallet of a case	10
Bolts of fastening of masloraspylitel	15
Bolts of fastening of the oil pump (M8x30)	20

Diesel models

Only the values typical for all engines of the considered series are listed below.

General parameters

Engine type
M612	Line (R), 5-cylinder, DOHC, turbocharged, with water cooling, the GRM chain drive
M628	The V-shaped, 8-cylinder, DOHC, turbocharged, with water cooling, the GRM chain drive
Model range of application
G270 CDI (463.323)	612.965
G400 CDI (463.333)	628.962
Engine displacement, l
M612	2.7
M628	4.0
The number of valves on the cylinder	4
Pressure of a compression, atm
Nominal rate	29 ÷ 35
Minimum admissible value (approximately)	18
The maximum admissible difference in indications between cylinders	3.0
Operating procedure of cylinders
M612	1-2-4-5-3
M628	1-5-4-8-6-3-7-2
Valvate gaps	Are not regulated since hydrocompensators are used

Head of cylinders

M612

Casting

Sizes of bolts of fastening of a head of cylinders

Carving M12

Length, mm

Except M612.990

New bolt

102

Extreme admissible value

104

M612.990

New bolt

107

Extreme admissible value

-

Details of installation of valves in a head of cylinders (series 612 engines)


and — Landing of the new valve at a new saddle	N — Height of a head of cylinders

Full height of a head of cylinders, mm
Nominal rate	126.85 ÷ 127.15
Extreme admissible value	-

Saddles of valves

Boring of saddles of valves (series 612 engines)


b — Width of a working facet a — the Tilt angle of a working facet	g — the Adjustment corner

Geometrical characteristics of a saddle of the valve
All valves
a	45 ° (-30')
b, mm	1.0 ÷ 1.5
g	30 ° (± 15')
And, mm	0.9 ÷ 1.1
Maximum admissible ovality, mm	0.03

Valves

D — Diameter of a plate
h — Height of a cylindrical part of a plate (corbel)
D1 — Diameter of a core
L — valve Length

Diameter of a plate (D), mm
Inlet valves	30.1 ÷ 30.3
Final valves	28.3 ÷ 28.5
Height of a cylindrical part (corbel) of a plate (h), mm
All valves	1.7 ÷ 1.9
Tilt angle of a working facet (a)
All valves	45 ° (+15')
Diameter of a core (D1), mm
Inlet valves	6.960 ÷ 6.975
Final valves	6.955 ÷ 6.970
Superficial reinforcing of a saddle
All valves	No
Sodium filling
All valves	No
Length of the valve (L), mm
Inlet valves	104.7 ÷ 104.9
Final valves	104.5 ÷ 104.9
Identification marking of a plate
Inlet valves	Е 611 01
Final valves	And 611 01 05
Distance from a valve core end face to the basis of the bearing of the camshaft (T), mm
All valves	17.1 ÷ 17.9
Landing of the new valve at a new saddle (a), mm
Inlet valves	1.1 ÷ 1.5
Final valves	1.0 ÷ 1.4

Series 628

Casting

Sizes of bolts of fastening of a head of cylinders

Carving M12

Length, mm

New bolt

201.5

Extreme admissible value

203

Block of cylinders

Series 612

Flywheel

Extreme size of a cross beating of a gear wreath, mm	0.4
Diameter of the aligning plug of a gear wreath, mm	276.05 (± 0.05)

Case

Diameter of beds of radical bearings, mm	62.500 ÷ 62.519
Width of a bed of the persistent bearing, mm	19.979 ÷ 20.000
Extreme admissible size of ovality / conicity of beds of radical bearings, mm	0.02

Bent shaft

Sizes of bolts of fastening of covers of radical bearings
Carving	M11
Length (L), mm
New bolt	61.8 ÷ 62.2
Extreme admissible value	63.8
Sizes of side plays of a bent shaft in radical bearings, mm
Radial side play
Nominal rate	0.03 ÷ 0.05
Extreme admissible value	0.08
Axial side play
Nominal rate	0.10 ÷ 0.25
Extreme admissible value	0.3

Inserts of radical bearings

Thickness of inserts of radical bearings (top and lower inserts), mm
Standard size (Ø of 58.00 mm)
Blue marking (code 52)	2.255 ÷ 2.260
Yellow marking (code 54)	2.260 ÷ 2.265
Red marking (code 56)	2.265 ÷ 2.270
White marking (code 57)	2.270 ÷ 2.275
Purple marking (code 58)	2.275 ÷ 2.280

Conrod and piston assemblies

The size of a vystupaniye of the piston (a) in a new case, mm 0.38 ÷ 0.62

Size of a side side play of piston rings, mm

Flute 1

0.12 ÷ 0.16

Flute 2

0.05 ÷ 0.09

Flute 3

0.03 ÷ 0.07

The size of gaps in locks of piston rings, mm

Flute 1

0.22 ÷ 0.42

Flute 2

0.20 ÷ 0.40

Flute 3

0.20 ÷ 0.40

Bolts of fastening of the lower heads of rods

Diameter of a carving part

8x1

Length (L) (see сопр. illustration), mm

New bolt

47 ± 0.3

Extreme admissible value

48

1 — the Rod
2 — the Cover of the lower head
3 — the Plug
4 — the Directing plug
5 — the Bolt

6 — the Balance weight
7 — the Marking platform
8 — Grooves under uvulas of inserts
9 — Maslotok
10 — oil spraying Drillings

Sizes of rods

Distance between centers the conrod bearing and an opening under landing of a piston finger (L), mm 148.970 ÷ 149.030

Width of heads of a rod (In and b), mm 21.940 ÷ 22.000

Internal diameter of the lower head of a rod (D1), mm 51.600 ÷ 51.614

Extreme admissible sizes of ovality and conicity of a bed of a shatunnogopodshipnik, mm 0.02

The extreme admissible size of twisting of a rod on length more than 100 mm 0.100

Extreme admissible size of violation of coaxiality of heads of a rod, mm 0.045

Internal diameter of the plug top golovkishatuna (d), mm 30.018 ÷ 30.024

Basic diameter of the plug of the top head of a rod (d1), mm 32.500 ÷ 32.525

The size of a side play of landing of a porshnevogopalets in a rod, mm 0.018 ÷ 0.024

Limit admissible difference of scales of conrod assemblies, 2