Jeep Grandee Cheroki
+ Jeep Grand Cherokee brand Cars
+ Settings and routine maintenance
+ Ryadny six-cylinder engine
+ V8 Engine
- Procedures of the general and major maintenance of the engine
General information
Major maintenance of the engine - the general information
Check of kompressionny pressure in cylinders
The diagnostic checks made by means of the vacuum gage
Methods of removal of the engine and necessary precautionary measures
Removal and engine installation
Options 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
Assembly of a head of cylinders
Removal of shatunno-piston assemblies
Removal of a cranked shaft
Cleaning of the block of the engine
Check of a condition of the block of the engine
Honingovaniye of cylinders
Check of a condition of shatunno-piston assemblies
Check of a condition of a cranked shaft
Check of a condition of radical and shatunny bearings
Engine assembly order after completion of its major maintenance
Installation of a cranked shaft and check of gaps of radical bearings
Installation of piston rings
Installation of shatunno-piston assemblies and check of gaps in shatunny bearings
The first start of the engine after major maintenance
+ Systems of cooling, heating and air conditioning
+ the Power supply system and production of the fulfilled gases
+ System of electric equipment of the engine
+ Systems of decrease in toxicity of the fulfilled gases and engine management
+ Manual box of gear shifting
+ Automatic transmission
+ Transfer case
+ Coupling and transmission line
+ Brake system
+ Suspension bracket and steering
+ Body
+ System of onboard electric equipment
+ Governing bodies and operation receptions
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Procedures of the general and major maintenance of the engine
Specifications
Ryadny 6-cylinder engine in volume of 4.0 l
General parameters
| Working volume |
4.0 l (4228 cm3)
|
| Kompressionnoye pressure in cylinders (kgf/cm2) |
8,4 — 10,5
|
| The maximum admissible distinction in kompressionny pressure between cylinders (kgf/cm2) |
2,1
|
| Pressure of oil (kgf/cm2)
|
- On idling turns (600 rpm)
|
0,9
|
- At frequency of rotation of the engine of 1600 rpm
|
2,6 — 5,3
|
Engine block
| Diameter of cylinders (mm) |
98,43 — 98,48
|
| Admissible konusnost and ovality (mm) |
0,03
|
| The maximum admissible not planeness 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 not planeness of a head |
0,05 mm on 152.4 mm of length
|
| 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
|
| Gap between a core of the valve and walls of the directing plug (mm) |
0,025 — 0,076
|
| Free length of a klapanny spring (mm) |
49,96
|
| Adjusting height of a klapanny spring (mm) |
41,7
|
| Length of the valve (mm)
|
|
|
122,48 — 122,86
|
|
|
122,86 — 123,24
|
Cranked shaft and rods
| Diameter of shatunny necks (mm) |
53,172 — 53,226
|
| Gap in shatunny bearings (mm)
|
|
|
0,038 — 0,051
|
|
|
0,025 — 0,076
|
| Lateral gap (axial люфт) rods (mm) |
0,25 — 0,48
|
| Diameter of radical necks (mm) |
63,490 — 63,503
|
| Gap in radical bearings (mm)
|
|
|
0,05
|
|
|
0,025 — 0,064
|
| Axial люфт a cranked shaft (on the persistent bearing) (mm) |
0,038 — 0,165
|
| The maximum admissible konusnost and ovality (for all necks) (mm) |
0,013
|
Pistons and piston rings
| Gap between the piston and walls of the cylinder (mm) |
|
|
0,033 — 0,038
|
|
|
0,033 — 0,038
|
| Gap in locks of piston rings (mm) |
|
|
0,25 — 0,51
|
- Maslosjemnoye ring (steel sections)
|
0,25 — 0,64
|
| Lateral gap of piston rings (mm) |
|
|
|
|
0,043
|
|
|
0,043 — 0,081
|
|
|
|
|
0,076
|
|
|
0,025 — 0,241
|
Efforts of a tightening of carving connections, N • м*
|
Bolts of covers of radical bearings
|
108
|
|
Nuts of covers of the bottom heads of rods (shatunny bearings)
|
45
|
V8 engine in volume of 5.2 l
General parameters
| Working volume |
5.2 l (5211 cm3)
|
| Kompressionnoye pressure in cylinders (kgf/cm2) |
8,4 — 10,5
|
| The maximum admissible distinction in kompressionny pressure between cylinders (kgf/cm2) |
2,1
|
| Pressure of oil (kgf/cm2) |
|
| On idling turns (600 rpm) |
0,7
|
| At frequency of rotation of the engine of 3000 rpm |
2,1 — 5,6
|
Engine block
| Diameter of cylinders (mm) |
99,31 — 99,42
|
| Admissible konusnost (mm) |
0,25
|
| Admissible ovality (mm) |
0,13
|
| The maximum admissible not planeness 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 not planeness of a head |
0,05 mm on 152.4 mm of length
|
| 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
|
| Gap between a core of the valve and walls of the directing plug (mm) |
0,025 — 0,076
|
| Free length of a klapanny spring (mm) |
49,96
|
| Adjusting height of a klapanny spring (mm) |
41,7
|
| Length of the valve (mm)
|
|
|
124,28 — 124,92
|
|
|
124,64 — 125,27
|
Cranked shaft and rods
| Diameter of shatunny necks (mm) |
53,95 — 53,98
|
| Gap in shatunny bearings (mm)
|
|
|
0,01 — 0,06
|
|
|
0,008
|
| Lateral gap (axial люфт) rods (mm) |
0,15 — 0,36
|
| Diameter of radical necks (mm) |
63,487 — 63,513
|
| Gap in radical bearings (mm)
|
|
|
0,01 — 0,04
|
|
|
|
|
0,01 — 0,05
|
|
|
0,06 mm
|
| Axial люфт cranked shaft (mm) |
0,05 — 0,18
|
| The maximum admissible konusnost and ovality (for all necks) (mm) |
0,025
|
Pistons and piston rings
| Gap between the piston and walls of the cylinder (mm) |
0,013 — 0,038
|
| Gap in locks of piston rings (mm)
|
|
|
0,25 — 0,51
|
- Maslosjemnoye ring (steel sections)
|
0,25 — 1,27
|
| Lateral gap of piston rings (mm)
|
|
|
0,038 — 0,076
|
|
|
0,05 — 0,20
|
Efforts of a tightening of carving connections *, N • m
|
Bolts of covers of radical bearings
|
115
|
|
Nuts of covers of the bottom heads of rods (shatunny bearings)
|
61
|
|
|