Jeep Grand Cherokee

1993-1999 of release

Repair and car operation

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


Service of valves

In view of complexity of character of procedure and necessity of use of the special tool and the equipment, service of valves, their saddles and the directing plugs, usually named клапанными works, should be carried out by the mechanic-professional.

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

The expert of dealer branch or car-care centre workshop will carry out removal of valves and their springs and will be engaged in restoration or replacement of valves and клапанных 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 маслоотражательных caps of valves, assemblage of components and check of adjusting height клапанных springs. Also, in case of need, processing of a head for the purpose of restoration of planeness of its interfaced surface will be made станочная. On engines V8 both heads should be сфрезерованы on identical depth and if the layer of metal more than 0,5 mm is removed in the thickness, bottom and lateral interfaced surfaces of the inlet pipeline should be processed in appropriate way for the purpose of adequate combination of all channels and apertures.

Проточка клапанных saddles it should be made in a workshop of car-care centre by means of the special machine (the picture see) - centering of a new saddle in relation to directing plug of the valve is made with the help отцентрованного 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 клапанных 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 taken advantage of compressed air, carefully blow all smallest apertures, channels and cavities.