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

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Reduction in position ВМТ of a step of compression of the piston of the first cylinder

As the top dead point (ВМТ) is called the highest point of the piston stroke defined by rotation of a cranked shaft. Each piston reaches ВМТ twice - in the end of a step of compression and, again, in the end of a release step, however, it is accepted to mean by position ВМТ ВМТ of a step of compression. The distributive labels put on демпфере крутильных of fluctuations (see an illustration), the cranked shaft established on a forward pin correspond ВМТ a step of compression of the piston of the first cylinder.

Reduction of pistons in position ВМТ is basic step at performance of such procedures, as removal коромысел, adjustment of valves, replacement of a distributive chain and asterisks and distributor removal.

In position ВМТ it is necessary to make for reduction of the piston of any of cylinders проворачивание a cranked shaft. For this purpose it is possible to take advantage of one of offered below methods. If to look at the engine in front, normal it is considered rotation of a cranked shaft clockwise.

Before starting performance of the given procedure make sure that transmission is established in neutral position and disconnect from the central plug of the distributor a wire of the coil for a time conclusion out of operation ignition systems.

  1. The method проворачивания a cranked shaft by means of the big replaceable face head put on a bolt демпфера крутильных the fluctuations, screwed in in an end face of a shaft and resulted in rotation by a collar is preferable.
  2. It is possible to take advantage of the remote switch of a starter that will allow to save time some. Connect switch wires to plugs S (Switch) and In starter (Battery). As much as possible close having brought the piston to position ВМТ by means of the switch, finish procedure by the way, offered in the previous point.
  3. If there is a possibility to resort to the help of the assistant, the starter can be turned by short inclusions from a driver's place. After piston approach to ВМТ, procedure comes to the end by means of a replaceable head (the point see)).

 PERFORMANCE ORDER

  1. Remember position of the plug of a wire of a spark plug of the first cylinder on a distributor cover in relation to its case. For a guarantee put a felt-tip pen or a chalk on the distributor case directly under the given plug a corresponding label. Give fixing screws, uncover the distributor and take her aside.

Numbers of plugs are put on candle wires near to the distributor where they and can be found if wires are established фабрично. If numbers are absent, preliminary accurately mark wires.


  1. Having found on a cover of the distributor the plug of a spark plug of the first cylinder, put on the distributor case the corresponding label located directly under the given plug.
  1. Uncover the distributor (see the Head of Adjustment and routine maintenance).
  2. Turn a cranked shaft (the item "For piston reduction see...") so that risk on it демпфере крутильных fluctuations it was combined with a zero mark in a distributive scale of a cover of a chain. The index or label ВМТ and демпфер are usually located in the bottom part of a forward wall of the engine, near a pulley rotating приводной a belt.
  1. Turn a cranked shaft so that risk on демпфере крутильных fluctuations (marksman) it has appeared directly opposite to a zero mark of a scale in a cover of a distributive chain.
  1. Look on бегунок the distributor - its nouse should appear is directed directly on put on the case of the distributor a label. If it not so, the piston of the first cylinder is in position ВМТ of a step of release.
  1. Uncover the distributor and make sure that бегунок will turn a nouse to a label on the case (marksman).
  1. For reduction of the piston of the first cylinder in position ВМТ of a step of compression turn a cranked shaft on one complete revolution (360 ) clockwise. Now the nouse бегунка should turn towards a label. When бегунок will turn towards an arrangement of the plug of a spark plug of the first cylinder on a distributor cover (a label on the case), and distributive labels in appropriate way are combined, the piston of the first cylinder is in position ВМТ of a step of compression.
  2. After in ВМТ a compression step the piston of the first cylinder is resulted, the others can are translated in the same position by consecutive проворачивания a cranked shaft on 180 and according to ignition order (Specifications see).