Jeep Grand Cherokee

1993-1999 of release

Repair and operation of the car



Jeep Grand Cherokee
+ Cars of the Jeep Grand Cherokee brand
+ Settings and routine maintenance
+ Line six-cylinder engine
+ V8 engine
- Procedures of the general and capital repairs of the engine
   General information
   Capital repairs of the engine - the general information
   Check of compression 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 installation of the engine
   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 conrod and piston assemblies
   Removal of a bent 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 conrod and piston assemblies
   Check of a condition of a bent shaft
   Check of a condition of radical and conrod bearings
   Engine assembly order after completion of its capital repairs
   Installation of a bent shaft and check of gaps of radical bearings
   Installation of piston rings
   Installation of conrod and piston assemblies and check of gaps in conrod bearings
   The first start of the engine after capital repairs
+ Cooling systems, heating and air conditioning
+ A 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 methods of operation



Capital repairs of the engine - the general information

It is not always easy to define when follows and whether it is necessary to make complete capital repairs of the engine in general. At the solution of this task it is necessary to take a set of factors into account.

The considerable run far not necessarily is a sign of need of carrying out capital repairs and vice versa, the small run is not a guarantee of good shape of the engine at all. Perhaps, the most important factor is the frequency of performing procedures of routine maintenance of the car here. The engine on which change of oil and an oil filter were regularly and often made it is equal as other procedures for leaving were honestly performed, with big degree of probability will smoothly serve many and many thousands of kilometers. At neglect performing procedures of routine maintenance carrying out capital repairs of the engine can be required already later absolutely insignificant time.

The excessive consumption of motive oil usually is a sign of need of paying of attention to a condition of piston rings, maslootrazhatelny caps and/or the directing plugs of valves. Before coming to conclusion about bad condition of these components make sure that losses of oil happen not owing to its leaks. Conducting check of compression pressure will help to help scoping of works which performance is required during capital repairs of the engine (The section Check of Compression Pressure with cylinders).

 PERFORMANCE ORDER

  1. Believe oil pressure, having installed the manometer instead of pressure sensor and compare results of measurements to requirements of Specifications. If pressure is not enough, it speaks about the wear of bearings and/or the oil pump which is perhaps taking place.
  1. Remove the block of the sensor of pressure of oil (shooter)...

... also connect instead of it the manometer for measurement of pressure of oil - the line 6th cylinder engine is shown, pressure sensor on V8 engines is located on the top part of the block, behind the inlet pipeline.

Loss of power, unstable operation of the engine, excessive noise of the valvate mechanism and the increased fuel consumption can be signs of need of carrying out capital repairs of the engine, in particular if they are present all at the same time. If full setup of the engine does not help to correct a situation, carrying out the general mechanical works on restoration of internal components of the engine is required.

Performance of capital repairs of the engine means recovery of its operational characteristics to specification values of the new unit. During capital repairs replacement of piston rings and restoration of mirrors of cylinders (a pro-point and a honingovaniye) are usually made. If the pro-point of cylinders is made in a workshop of car service, usually also pistons of the repair size at the same time are installed. Replacement of radical and conrod bearings, and also camshaft bearings is also usually made. The pro-point and restoration of necks of a bent shaft can be in case of need made. The full complex of service of the valvate mechanism which components by the time of need of carrying out capital repairs of the engine seldom are in satisfactory condition is usually carried out.

Along with carrying out capital repairs of the engine also other components, such as the distributor, a starter and the generator can be restored. As a result of the carried-out complex of works the restored engine has to receive characteristics new and smoothly serve still many thousands of kilometers of a run.

During capital repairs of the engine also replacement of such critical components of the cooling system as hoses, driving belts, the thermostat and the water pump is WITHOUT FAIL made. Many auto repair shops do not give any guarantees for the work if professional cleaning, check of a state and repair of a radiator were not made previously. The radiator has to be carefully checked for existence of signs of leaks and blocking of internal channels (The head of the Cooling system, heating and air conditioning). In the absence of confidence in diagnostics of malfunctions of a radiator replace it. It is not recommended to make capital repairs of the oil pump - install the new pump on the restored engine.

Before starting capital repairs of the engine attentively study the description demanding performing procedures and try to imagine the nature of the forthcoming work clearly. Performance of capital repairs of the engine should not cause special difficulties, under conditions of accurate following to instructions, existence of the necessary tool and careful observance of requirements of Specifications, however demands patience and certain expenses of time. It is necessary to plan refusal of use of the car for term at least in two weeks, in particular if any of components it is necessary to send for repair or restoration to a workshop of car service. Make sure available all necessary spare parts and take care of preliminary rent or acquisition of the special tool and equipment.

The most part of works can is made by means of the ordinary metalwork tool though definition of the validity to the further use of some details requires use of the exact measuring equipment. Examination of a condition of separate elements can be made at car repair shop where you receive the corresponding recommendations about their replacement.

Before solving what part of works it is necessary to charge to specialists of automobile repair shop make full dismantling of the engine and all its components (especially it concerns the engine block) for performance and carefully check their state. As the condition of the block is the main criterion of definition of whether it is necessary to make capital repairs of the old engine or it is simpler to replace it new or restored, never start acquisition of spare parts and do not carry out machine processing any of components until the condition of the block is carefully investigated. Carrying out capital repairs of the engine usually demands expenses in the main time therefore you should not try to save on installation of non-standard or low-quality components.

In conclusion it is necessary to notice that to achieve the maximum term of trouble-free service of the restored engine, its assembly after carrying out capital repairs should be made in perfectly pure conditions.