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

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Installation of piston rings

Before installation of new piston rings it is necessary to make measurement of gaps in their locks. It is meant that the lateral gap of rings in flutes is checked earlier and corresponds to requirements of Specifications (The section Check of a condition of shatunno-piston assemblies).


  1. Spread out shatunno-piston assemblies and sets of new rings so that in the course of measurement of gaps and assembly of the engine of a ring were constantly adhered" to the assemblies and cylinders.
  2. Insert top (No. 1) a piston ring into the first cylinder of the engine and establish it perpendicular to cylinder walls, having leveled by introduction in the piston cylinder the bottom forward. The ring should appear in the lower part of the cylinder, around border of a course of rings.
  1. For gap check in the lock piston a ring it should be inserted into the cylinder and is leveled perpendicular to its walls (it simplest to achieve, pushing a ring into the cylinder the piston bottom, as is shown in a picture).
  1. For gap measurement in the lock of a ring enter into space between end faces of a ring of an edge щупа, having picked up them so that their total thickness equaled to gap size. Thus щуп should slide in a lock gap with easy resistance. Compare results of measurement to requirements of Specifications. If the gap exceeds the maximum admissible value, once again make sure that the compared characteristic corresponds to chosen ring.
  1. Having established a ring perpendicular to cylinder walls, measure a gap in its lock with the help щупа lezviyny type.
  1. If the gap is too small, it should be increased in order to avoid a lock smykaniye in the course of thermal expansion of a ring at operation of the engine as it can lead to serious consequences. The gap can be expanded a way of a careful rastachivaniye of end faces of a ring in its lock a file. Clamp a file in a vice with soft sponges, put on a ring the lock a file and slowly pull it on itself, removing a material from end faces. Pull a ring only on itself (see drawing below).
  1. If the gap in the lock is too small, clamp a file in a vice with soft sponges and, having put on it a ring the lock, pull it on itself, removing a little material from end faces.
  1. The excessive gap in the lock of a ring is not a crime if does not exceed 1 mm. Again, once again check compared data on compliance to their checked ring. Make sure that the acquired set of rings corresponds to type of the engine of your car.
  2. Repeat procedure for each of rings which will be established in the first cylinder, then pass to the remained cylinders. Remember need of a podderzhivaniye of compliance of rings to the pistons and cylinders.
  3. After completion of check/correction of gaps in locks of piston rings, rings should be established on pistons.
  4. The maslosjemny ring (bottom on the piston) is usually established to the first. It consists their three separate sections. At first insert into a flute on the piston a ring dilator. If the lock uvula is applied to prevention of rotation of a ring, insert it into drilling in a flute. Then establish the bottom lateral section of a ring. Do not use the tool for installation of rings for putting on on the piston of lateral sections of maslosjemny rings. Instead get one end of section in a flute between a dilator and a wall of a flute and, firmly holding it a finger, gradually fill in a flute the section rest, carrying out with pressing on its perimeter a finger of other hand. Then, similar image, establish the second lateral section of a ring.

Installation in the bottom flute on the piston of a dilator of a maslosjemny ring.

Do not apply to installation of lateral sections of a maslosjemny ring any special tool.
  1. After installation of all three sections of a maslosjemny ring make sure that both (top and bottom) its lateral sections freely rotate in a flute.
  2. The average (No. 2) a kompressionny ring is established to the second. On it the label which should be turned at installation up, to the piston bottom is beaten usually out. The party of the second kompressionny ring with the removed facet should be turned down in all engines, on 6-cylinder engines the ring should be established by a label in the form of two points up, on V8 engines the identification label represents the drilling, the beaten-out letter Oh, oval deepening or the word TOP (top).

Without fail follow instructions on packing of a set of rings - various manufacturers can make various demands to an order of performance of this procedure. Do not mix an average kompressionny ring with the top - they have different cross-section sections.

  1. Use the special tool for installation of piston rings and track that the label on a ring was turned up. Insert a ring into an average flute on the piston. Do not plant the lock of a ring more widely, than it really is required for its putting on on the piston.

Installation of a kompressionny ring by means of a dilator of rings - an identification label (if it is provided) should be turned up (arrow).

  1. In a similar manner establish top (No. 1) a kompressionny ring. Track that the label (point) was turned up. Do not mix the top ring with an average. The first (top) kompressionny ring should be established by the party with the removed facet UP (whereas the second ring is put on by a facet DOWN). Usually the second ring aims from the top party two points, and the first (top) - one. Adhere to the instructions attached to a set.

The second kompressionny ring should be established by a facet DOWN whereas the first (top) - UP - do not mix!

  1. Repeat procedure for all remained pistons.