Jeep Grand Cherokee

1993-1999 of release

Repair and car operation



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)
  • The inlet
122,48 — 122,86
  • The final
122,86 — 123,24

Cranked shaft and rods

Diameter of shatunny necks (mm)
53,172 — 53,226
Gap in shatunny bearings (mm)
  • The nominal
0,038 — 0,051
  • The admissible
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)
  • The nominal
0,05
  • The admissible
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)
  • The nominal
0,033 — 0,038
  • The admissible
0,033 — 0,038
Gap in locks of piston rings (mm)
  • Kompressionnye of a ring
0,25 — 0,51
  • Maslosjemnoye ring (steel sections)
0,25 — 0,64
Lateral gap of piston rings (mm)
  • Kompressionnye of a ring
    • The nominal
0,043
    • The admissible
0,043 — 0,081
  • Maslosjemnoye ring
    • The nominal
0,076
    • The admissible
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

*podrobny see. Specifications to Head Ryadny the six-cylinder engine.

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)
  • The inlet
124,28 — 124,92
  • The final
124,64 — 125,27

Cranked shaft and rods

Diameter of shatunny necks (mm)
53,95 — 53,98
Gap in shatunny bearings (mm)
  • The nominal
0,01 — 0,06
  • The admissible
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)
  • No. 1
0,01 — 0,04
  • No. No. 2, 3, 4 and 5
    • The nominal
0,01 — 0,05
    • The admissible
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)
  • Kompressionnye of a ring
0,25 — 0,51
  • Maslosjemnoye ring (steel sections)
0,25 — 1,27
Lateral gap of piston rings (mm)
  • Kompressionnye of a ring
0,038 — 0,076
  • Maslosjemnoye ring
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

*podrobny see. Specifications to Head the V8 Engine.