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
   General information
   The repair procedures, which performance does not demand engine extraction from the car
   Reduction in position VMT of the piston of the first cylinder
   Removal and installation of covers of heads of cylinders
   Removal, check of a condition and installation of yokes and bars of pushers
   Replacement of klapanny springs, their plates and maslootrazhatelny caps
   Removal and installation of the inlet pipeline
   Removal and installation of final collectors
   Removal and installation of heads of cylinders
   Replacement of a forward epiploon of a cranked shaft
   Removal, check of a condition and installation of a cover of the distributive chain, chain and its asterisks
   Removal, check of a condition and installation of a camshaft and hydraulic pushers
   Removal and installation of the pallet of a case
   Removal, check of a condition and installation of the oil pump
   Removal and flywheel installation / driving disk
   Replacement of a back radical epiploon
   Check of a condition and replacement of rubber pillows of support of the engine
+ Procedures of the general and major maintenance of the engine
+ 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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Removal, check of a condition and installation of a camshaft and hydraulic pushers

These models of cars are equipped with safety cushions. The pillow constantly is in readiness and can work to (be inflated) at any time at the connected battery. In order to avoid casual operation of system (and receiving as a result of a trauma) each time at work with safety cushion components (including sensors of blow which can be located near a lattice/bumper lobby) disconnect from the battery a negative wire. After shutdown of the battery before starting to work it is necessary to wait not less than 2 minutes (the system is equipped with the condenser of a delay which should be discharged completely). For more details see. Head System of onboard electric equipment.


Air central air constantly is under pressure. Do not weaken shtutserny connections of lines and do not disconnect systems any of components before carrying out its discharge. The coolant should be extorted from system in special compensatory and regenerative ERA-blok at station of dealer office or in a specialized workshop of car-care center. At a rassoyedineniye of lines of system surely put on goggles!

Measurement of height of working ledges (lifting) of cams of a camshaft

Check of height of working ledges of cams is made for the purpose of an assessment of degree of wear of a shaft and carried out before removal of a shaft from the engine.

 PERFORMANCE ORDER

  1. Uncover heads of cylinders (The section Removal and installation of covers of heads of cylinders).
  2. Bring the piston of the first cylinder into the provision VMT of a step of compression (The section Reduction in position VMT of the piston of the first cylinder). Fix a tsiferblatny measuring instrument on the engine so that its plunzher appeared is coaxial to a bar of a pusher and rested against a yoke of the first piston (see an illustration in Head Ryadny the six-cylinder engine).
  3. Null a measuring instrument and start to turn very slowly a camshaft in the normal direction (clockwise) until the arrow of the device will not stand on the maximum indication and will not start to fall back. The maximum indication of a measuring instrument fixes to the maximum height of lifting of a cam.
  4. Write down the indication, then return the piston to the provision VMT of a step of compression.
  5. Establish a measuring instrument over a yoke of the second valve of the first cylinder and repeat procedure. Accurately write down results of all measurements.
  6. Repeat check for valves of the remained cylinders. As everyone their pistons during check should be in the provision VMT of a step of compression, pass from one of them to another simplest as ignition (see. Specifications).
  7. On termination of measurements share all written-down results on 1.5 for receiving the general height of lifting of each of cams (yokes provide transfer number 1.5:1). Compare results of calculations to requirements of Specifications. If cam lifting less admissible value Specifications on 0,08 mm, is considered a camshaft worn-out and is subject to replacement.

Camshaft removal

 PERFORMANCE ORDER

  1. Make a discharge of central air of air in dealer office or a specialized workshop where there is the corresponding equipment.
  2. Disconnect a negative wire from the battery.
  3. Remove the inlet pipeline, yokes, bars of pushers, a distributive chain with camshaft asterisks.
  4. Remove the distributor (Head System of electric equipment of the engine). Remove a radiator, a forward (radiatorny) lattice and the condenser of the conditioner of air.

For providing necessary working space (for camshaft removal) there can be a need for an otbolchivaniye and removal of a vertical support of a clamp of the lock of a cowl (Head the Body).

  1. Roller type hydraulic pushers should be marked by paint from the outer side. It is not possible to find such labels, mark pushers independently before taking them.

At installation pushers surely should be correctly сориентированы in order to avoid a rassovmeshcheniye of maslopodayushchy openings.


  1. Pay attention to the labels (arrow) put with paint showing what by the party roller pushers should be turned outside - if it is not possible to find a label, put them independently.
  1. Give three bolts and remove the holder of pushers.
  1. Give three bolts (arrow) and remove the holder of pushers.
  1. There are some ways of extraction of hydraulic pushers from their nests. Many companies the special tool intended for capture and extraction of pushers, however need for its application is issued is not strictly obligatory. On rather new engines where the nagaroobrazovaniye is insignificant pushers often it is possible to take from nests by means of a magnet or even manually. Also metalwork chertilka well is suitable for a poddevaniye of pushers with the bent edge which is got under the lock ring established in the top part of each pusher.

Application for capture of pushers is not allowed AT ALL (if only they are not subject to replacement) flat-nose pliers - their sponges can easily damage superficial training of walls of pushers that is equivalent to their conclusion out of operation.

  1. Remove directing pushers and pushers. To put components follows in the organized order guaranteeing possibility of their installation at assembly on the former places - it is best of all to prepare specially marked boxes in advance.
  1. Remove pushers and directing rotations of pushers of roller type serving for prevention in the nests.
  1. To Otboltita also remove a persistent plate of a camshaft and an oil level. Remember how the level was established on the engine that at assembly to establish it similarly.
  1. Remove a persistent plate of a camshaft and an oil level.
  1. Screw a long bolt in an opening in a camshaft end face - it can be used as the handle at shaft extraction from the block.
  2. Carefully take a camshaft from the engine. In order to avoid damage of bearings at carrying out cams of a shaft through them try to support the last in the course of removal by the second hand as it is possible closer to the block.

Condition check

 PERFORMANCE ORDER

  1. After the camshaft will be taken from the engine, it is necessary for washing out in solvent and to dry up, then to check necks of bearings on existence of cavities, traces of jamming and non-uniform wear. If necks are damaged, probably injured there will be also loose leaves of the corresponding bearings in the block. To replacement in this case are subject both a shaft, and loose leaves.

Replacement of bearings of a camshaft demands use of special tools and a certain experience, and therefore lies outside the limits of qualification of the average amateur mechanic and in this Management is not considered. If bearings are in bad condition, the engine is necessary for removing from the car and to deliver in a car-care center workshop for the qualified performance of this work.

  1. If necks are found in a satisfactory condition, measure by a micrometer their diameters. Write down results of measurements. Measurement of diameter should be made in several points of each neck (both on length of a neck, and on its forming surface) is will help to reveal its ovality and a konusnost.
  2. Check camshaft cams on existence of traces of an overheat, scratches, chips, cavities and traces of non-uniform wear. If cams are found in a satisfactory condition and results of measurement of height of their liftings meet requirements of Specifications, the camshaft is subject to further use
  3. In case of engine equipment by hydraulic pushers of usual flat type the camshaft should be replaced each time at change of pushers, and on the contrary. However, if pushers of roller type are established, transfer of suitable pushers on a new shaft is quite admissible, however, to establish each of pushers follows surely in the former nest.
  4. After careful cleaning attentively examine rollers of pushers on existence of signs of wear and damages, make sure that they rotate freely.
  1. Rollers (if they are provided) in hydraulic pushers should rotate freely, without zakusyvaniye - check them also on existence of signs of wear and excessive люфта.

Installation

 PERFORMANCE ORDER

  1. Grease cams and necks of a camshaft with assembly impellent greasing.
  1. Before installation of a camshaft grease its cams and necks with assembly impellent greasing.
  1. Pass the tool for camshaft keeping (S-3509, or its equivalent) in an opening under the distributor. Use of this tool will prevent too deep landing of a shaft and knocking-out of a spherical stopper in a back part of the block. The tool should remain on a place until the distributive chain will be established.

If to get the special tool it is not possible, get a shaft in the block very slowly and carefully, trying to avoid stopper knocking-out. If tightness of installation of a stopper appears broken, there will be very strong leakages of oil.


The scheme of using the S-3509 tool at camshaft installation.

  1. Slowly insert a camshaft into the engine. Support a shaft the second hand as it is possible closer to the block and try not to damage bearings at a wire of cams of a shaft through them. Do not enter a shaft more deeply than it is necessary for installation of a persistent plate and an oil level.
  2. Establish a distributive chain with asterisks (The section Removal, check of a condition and installation of a cover of the distributive chain, the chain and its asterisks). Combine distributive labels on asterisks of cranked and distributive shaft.
  3. Establish into place the distributor (Head System of electric equipment of the engine).

After combination by the correct image of asterisks of shaft, the begunok of the distributor should turn to the plug of a wire of a spark plug of the sixth cylinder.

  1. Grease pushers with pure impellent oil and establish them in the block. If replacement of pushers was not made, they should be established in the former nests by the marked paint the party to a cavity. Establish directing (shooters to a camshaft) and the holder of pushers.
  2. Further installation make as it should be, the return to a removal order.
  3. Remove impellent oil, add the karterny conditioner of the Mopar type (No. 3419130) or an equivalent and establish the new oil filter (Head of Control and routine maintenance).
  4. Start the engine check it on leaks and check pressure of oil.

Do not lift frequency of rotation of the engine above turns of fast idling until hydraulic pushers will not be filled with oil and again will not start to work silently.

  1. If replacement of a camshaft or pushers was made, the engine is necessary for warming up to normal working temperature and to force it to work on turns of fast idling within at least 15-20 minutes for extra earnings of components. After that again replace oil and the oil filter.