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

Service of valves

In view of complexity of nature of procedure and need of use of the special tool and the equipment, service of valves, their saddles and the directing plugs, usually called by klapanny works, should be carried out by the professional mechanic.

to the amateur mechanic on forces there will be a carrying out removal and dismantling of a head of cylinders, implementation of preliminary cleaning and check of a condition of components then again it is necessary to collect and deliver a head for performance of klapanny works in a car-care center workshop. External survey will help you to find out with what condition there are components of a head of cylinders and the klapanny mechanism and to define volume and nature of the forthcoming recovery operations. On the basis of the analysis of available information you can define what replaceable details can be necessary at performance by the expert of procedure of service of valves.

The specialist of dealer office or workshop of car-care center will carry out removal of valves and their springs and will be engaged in restoration or replacement of valves and klapanny saddles, restoration of directing plugs, check of a condition and replacement (in case of need) plates (or rotary support) springs and crackers of cutting locks, replacement of maslootrazhatelny caps of valves, assembly of components and check of adjusting height of klapanny springs. Also, in case of need, stanochny processing of a head for the purpose of restoration of planeness of its interfaced surface will be made. On V8 both engines of a head should be сфрезерованы on identical depth and if the metal layer in thickness more than 0,5 mm is removed, bottom and lateral interfaced surfaces of the inlet pipeline should be processed as appropriate for the purpose of adequate combination of all channels and openings.

The pro-point of klapanny saddles should be made in a car-care center workshop by means of the special machine (see a picture) - centering of a new saddle in relation to directing plug of the valve is made by means of ottsentrovanny on a small beard and a grinding stone having strictly certain form.

Such processing provides absolute planeness of the deformed interfaced surfaces.

After performance by the professional of klapanny works the head should get characteristics new. Before installation on the engine should subject the head returned from a workshop careful cleaning for the purpose of removal of an abrasive and small metal particles which could remain after machining of a head and grinding in of valves. Having used the compressed air, carefully blow all smallest openings, channels and cavities.