Jeep Grand Cherokee
+ Cars of mark Jeep Grand Cherokee
+ Options and routine maintenance
+ Рядный the six-cylinder engine
+ Engine V8
- Procedure of the general and engine major repairs
The general information
Engine major repairs - the general information
Check компрессионного pressure in cylinders
The diagnostic checks made by means of the vacuum gauge
Methods of removal of the engine and necessary safety measures
Removal and engine installation
Variants of restoration of the engine
Order of dismantling of the engine
Dismantling of a head of cylinders
Cleaning and check of a condition of a head of cylinders
Service of valves
Assemblage of a head of cylinders
Removal of shatunno-piston assemblages
Removal of a cranked shaft
Cleaning of the block of the engine
Check of a condition of the block of the engine
Хонингование cylinders
Check of a condition of shatunno-piston assemblages
Check of a condition of a cranked shaft
Check of a condition radical and шатунных bearings
Assembly order of the engine after end of its major repairs
Installation of a cranked shaft and check of backlashes of radical bearings
Installation of piston rings
Installation of shatunno-piston assemblages and check of backlashes in шатунных bearings
The first start of the engine after major repairs
+ Systems of cooling, heating and air conditioning
+ The power supply system and release of the fulfilled gases
+ System of an electric equipment of the engine
+ Systems of decrease in toxicity of the fulfilled gases and engine management
+ Manual box of a gear change
+ Automatic transmission
+ Distributing box
+ Coupling and трансмиссионная a line
+ Brake system
+ Suspension bracket and steering
+ Body
+ System of an onboard electric equipment
+ Controls and operation receptions
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Procedure of the general and engine major repairs
Specifications
Рядный the 6-cylinder engine in volume of 4.0 l
The general parametres
| Working volume |
4.0 l (4228 sm3)
|
| Kompressionnoe pressure in cylinders (кГс/см2) |
8,4 — 10,5
|
| The maximum admissible distinction in компрессионном pressure between cylinders (кГс/см2) |
2,1
|
| Pressure of oil (кГс/см2)
|
On idling turns (600 rpm)
|
0,9
|
At frequency of rotation of the engine of 1600 rpm
|
2,6 — 5,3
|
The engine block
| Diameter of cylinders (mm) |
98,43 — 98,48
|
| Admissible конусность and ovality (mm) |
0,03
|
| Maximum admissible неплоскостность interfaced to a head of cylinders of a surface |
0,05 mm on 152,4 mm of length
|
| Diameter of nests of pushers (mm) |
23,000 — 23,025
|
Head of cylinders and valves
| Maximum admissible неплоскостность heads |
0,05 mm on 152.4 mm of length
|
| The minimum width of a cylindrical site (corbel) of plates of valves (mm) |
0,79
|
| Corner of a saddle of valves (inlet and final) |
44,5
|
| Corner of a working facet of plates of valves (inlet and final) |
45
|
| Diameter of cores of valves (mm) |
7,90 — 7,92
|
| Backlash between a core of the valve and walls of the directing plug (mm) |
0,025 — 0,076
|
| Free length клапанной springs (mm) |
49,96
|
| Adjusting height клапанной springs (mm) |
41,7
|
| Length of the valve (mm)
|
|
|
122,48 — 122,86
|
|
|
122,86 — 123,24
|
Cranked shaft and rods
| Diameter шатунных necks (mm) |
53,172 — 53,226
|
| Backlash in шатунных bearings (mm)
|
|
|
0,038 — 0,051
|
|
|
0,025 — 0,076
|
| Lateral backlash (axial люфт) rods (mm) |
0,25 — 0,48
|
| Diameter of radical necks (mm) |
63,490 — 63,503
|
| Backlash in radical bearings (mm)
|
|
|
0,05
|
|
|
0,025 — 0,064
|
| Axial люфт a cranked shaft (on the persistent bearing) (mm) |
0,038 — 0,165
|
| Maximum admissible конусность and ovality (for all necks) (mm) |
0,013
|
Pistons and piston rings
| Backlash between the piston and walls of the cylinder (mm) |
|
|
0,033 — 0,038
|
|
|
0,033 — 0,038
|
| Backlash in locks of piston rings (mm) |
|
|
0,25 — 0,51
|
Maslosemnoe ring (steel sections)
|
0,25 — 0,64
|
| Lateral backlash of piston rings (mm) |
|
|
|
|
0,043
|
|
|
0,043 — 0,081
|
|
|
|
|
0,076
|
|
|
0,025 — 0,241
|
Efforts of a tightening of carving connections, Н•м*
|
Bolts of covers of radical bearings
|
108
|
|
Nuts of covers of the bottom heads of rods (шатунных bearings)
|
45
|
Engine V8 in volume of 5.2 l
The general parametres
| Working volume |
5.2 l (5211 sm3)
|
| Kompressionnoe pressure in cylinders (кГс/см2) |
8,4 — 10,5
|
| The maximum admissible distinction in компрессионном pressure between cylinders (кГс/см2) |
2,1
|
| Pressure of oil (кГс/см2) |
|
| On idling turns (600 rpm) |
0,7
|
| At frequency of rotation of the engine of 3000 rpm |
2,1 — 5,6
|
The engine block
| Diameter of cylinders (mm) |
99,31 — 99,42
|
| Admissible конусность (mm) |
0,25
|
| Admissible ovality (mm) |
0,13
|
| Maximum admissible неплоскостность interfaced to a head of cylinders of a surface |
0,05 mm on 152,4 mm of length
|
| Diameter of nests of pushers (mm) |
22,990 — 23,010
|
Head of cylinders and valves
| Maximum admissible неплоскостность heads |
0,05 mm on 152.4 mm of length
|
| The minimum width of a cylindrical site (corbel) of plates of valves (mm) |
1,19
|
| Corner of a saddle of valves (inlet and final) |
44,25 — 44,75
|
| Corner of a working facet of plates of valves (inlet and final) |
43,25 — 43,75
|
| Diameter of cores of valves (mm) |
7,90 — 7,92
|
| Backlash between a core of the valve and walls of the directing plug (mm) |
0,025 — 0,076
|
| Free length клапанной springs (mm) |
49,96
|
| Adjusting height клапанной springs (mm) |
41,7
|
| Length of the valve (mm)
|
|
|
124,28 — 124,92
|
|
|
124,64 — 125,27
|
Cranked shaft and rods
| Diameter шатунных necks (mm) |
53,95 — 53,98
|
| Backlash in шатунных bearings (mm)
|
|
|
0,01 — 0,06
|
|
|
0,008
|
| Lateral backlash (axial люфт) rods (mm) |
0,15 — 0,36
|
| Diameter of radical necks (mm) |
63,487 — 63,513
|
| Backlash in radical bearings (mm)
|
|
|
0,01 — 0,04
|
|
|
|
|
0,01 — 0,05
|
|
|
0,06 mm
|
| Axial люфт a cranked shaft (mm) |
0,05 — 0,18
|
| Maximum admissible конусность and ovality (for all necks) (mm) |
0,025
|
Pistons and piston rings
| Backlash between the piston and walls of the cylinder (mm) |
0,013 — 0,038
|
| Backlash in locks of piston rings (mm)
|
|
|
0,25 — 0,51
|
Maslosemnoe ring (steel sections)
|
0,25 — 1,27
|
| Lateral backlash of piston rings (mm)
|
|
|
0,038 — 0,076
|
|
|
0,05 — 0,20
|
Efforts of a tightening of carving connections *, Н•м
|
Bolts of covers of radical bearings
|
115
|
|
Nuts of covers of the bottom heads of rods (шатунных bearings)
|
61
|
|
|
*Подробнее Specifications to the Head Engine V8 see. |
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