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
   The general information
   The repair procedures, which performance it is possible without extraction of the engine from the car
   Reduction in position ВМТ of a step of compression of the piston of the first cylinder
   Removal and installation of a cover of a head of cylinders
   Removal, check of a condition and installation коромысел and bars of pushers
   Replacement клапанных springs, their plates and маслоотражательных caps
   Removal and installation of the inlet pipeline / a final collector
   Removal and installation of a head of cylinders
   Replacement of a forward epiploon of a cranked shaft
   Condition check, removal and installation of a cover of a distributive chain, chain and its asterisks
   Removal, check of a condition and installation of a camshaft, bearings and hydraulic pushers
   Removal and pallet installation картера
   Removal, check of a condition and installation of the oil pump
   Removal and installation of a flywheel/privodnogo of a disk
   Replacement of a back epiploon коленвала
   Check of a condition and replacement of rubber pillows of support of the engine
+ Engine V8
+ Procedure of the general and engine 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

e65f60b7


Replacement клапанных springs, their plates and маслоотражательных caps

Replacement broken клапанных springs and маслоотражательных caps of cores of valves does not demand carrying out of removal of a head of cylinders. For performance of this procedure presence of two special tools and a source of compressed air usually is required. Attentively familiarise materials of Section and in advance prepare all necessary materials and tools. If access to a source of compressed air is categorically impossible, for deduction of valves from falling in cylinders in the course of procedure performance it is possible to use a piece of a nylon cord.


 PERFORMANCE ORDER

  1. Uncover heads of cylinders (Has undressed Removal and installation of a cover of a head of cylinders).
  2. Unscrew a cylinder spark plug in which there are defective components. If there is a necessity for replacement маслоотражательных caps of cores of all valves, remove all candles.
  3. Turn a cranked shaft so that the piston of the corresponding cylinder has appeared in ВМТ the end of a step of compression (see Has undressed Reduction in position ВМТ of a step of compression of the piston of the first cylinder). If to replacement are subject маслоотражательные caps of cores of all valves, begin with the cylinder № 1 and serve valves of each of cylinders serially. From the cylinder to the cylinder pass as ignition (Specifications see).
  4. Screw an adapter in a candle aperture and connect to it a hose from a source of compressed air. Demanded type the adapter can be found in any of shops of automobile accessories.

Many компрессометры are delivered with the carving nozzle perfectly approaching as an adapter for giving in the cylinder of compressed air through a candle aperture.


So the adapter screwed in in a candle aperture for giving in the cylinder of compressed air looks - ask in shops of automobile accessories.

  1. Remove bolts, spherical support and коромысла valves of the cylinder with defective components, then take bars of pushers. If it is necessary to replace маслоотражательные caps of all valves, it is necessary to remove all коромысла and bars of all pushers (Has undressed Removal, check of a condition and installation коромысел and bars of pushers).
  2. Submit to the cylinder the compressed air.

Pressure of air the piston can is sharp move downwards, having caused sudden проворачивание a cranked shaft. If for piston transfer in position ВМТ the face key was used and during this moment it will be left put on the bolt which has been screwed in in an end face of a shaft, it is fraught with trauma reception.

  1. Valves should be kept now by pressure of air. If working surfaces of valves and a facet of their saddles appear considerably worn out, air leaks can lead to impossibility of keeping of valves in the closed condition - in this case it is necessary to resort to an alternative method.
  2. If access to a source of compressed air is absent, or deterioration of valves and their saddles does not allow to take advantage of it, it is necessary to resort to an alternative method of keeping of valves. Result the piston in position approximately 45 before ВМТ a compression step, then fill a piece of a nylon cord through a candle aperture in the combustion chamber, completely having filled it with it. Take care of that from a candle aperture remained to stick out the end of a cord of sufficient length for its subsequent extraction. The big face head with a collar rotate a cranked shaft in a normal direction till the moment of occurrence of easy resistance проворачиванию.
  3. Stop up with aperture rags in a head of cylinders near to valves in order to avoid falling in the engine of details and tools, then the special tool compress клапанную a spring. By means of small nippers or a magnet take crackers of the cutting lock.

Two various types of tools for compression клапанных springs without removal of a head of cylinders from the engine are issued. One tool is hooked for the bottom coils of a spring and at handle rotation provides pressing a spring plate whereas the second tool shown in drawing, operates as the lever, with use as a point of support a bolt коромысла. Both types of tools work equally well, however the second costs slightly more cheaply.


  1. Application of the tool for compression клапанной springs without removal of a head from the engine - crackers of the cutting lock can be taken now from a flute on a core of the valve by means of nippers or a magnet (the second is more preferable).
  1. Remove a plate or a rotary support of a spring, the plug (it is used on some types of valves) and assemblage клапанной springs, then remove маслоотражательный a cap of the directing plug

Valve components (models of last years of release have insignificant difference)

 
  1. Put on the end of a core of the valve a rubber bandage or wrap up its adhesive tape for the purpose of prevention of casual falling of the valve in the combustion chamber, then block air giving.

If instead of compressed air the nylon cord was applied, slightly turn a cranked shaft in opposite normal a direction.

  1. Check up a valve core on presence of damages. Повращайте the valve in the directing plug, trying to reveal presence эксцентриситета an end face of the core which is a sign of a bend of the valve.
  2. Move the valve upwards-downwards in the plug. Presence of points of jamming speaks about a bend of a core or damage of the directing plug. In both cases the head should be removed from the engine for repair carrying out.
  3. Again submit air to the cylinder for valve keeping in the closed position, then remove an adhesive tape or a rubber bandage from a core. If the nylon cord is applied to valve keeping, turn a cranked shaft in a normal direction till the moment of occurrence of easy resistance to rotation.
  4. Grease a valve core with impellent oil, and its end face - assembly impellent greasing and establish new маслоотражательный a cap of the directing plug, freely pulling its core of the valve before full landing to a plug ledge.

Caps put on extremely cautiously, trying to avoid their damage about keen edges of flutes under installation of crackers.

  1. Establish on the valve a spring.
  2. Establish a plate клапанной springs (or a rotary support). Compress a spring and establish crackers of the cutting lock in a flute on a valve core. For keeping of crackers in a flute to отпускания the tool compressing a spring, put on their internal walls a little dense greasing.
  3. Release the tool compressing a spring and make sure of correctness of landing of crackers.
  4. Disconnect an air hose and turn out an adapter from a candle aperture. If the cord was applied, take it from the cylinder.
  5. Establish to the place of the Bar of pushers, коромысла, spherical support and roadways скобы (Has undressed Removal, check of a condition and installation коромысел and bars of pushers).
  6. Screw a candle () ignitions and connect a candle wire () (the Head of Adjustment and routine maintenance).
  7. Establish into place a cover of a head of cylinders (Has undressed Removal and installation of a cover of a head of cylinders).
  8. Start the engine and check up it on leaks of oil and presence of the extraneous sounds proceeding from under a cover of a head.