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REPAIR MAINTENANCE OPERATION OF MOTOR VEHICLES
Jeep Grand Cherokee (from 1993 to 1999, the year of issue)

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Jeep Grand Cherokee
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Jeep
Grand Cherokee
Introduction
Adjustment and routine maintenance
The straight six-cylinder engine
The V8 engine
general information
Repair procedure which does not require extraction of the engine from the car
Bringing in TDC position of first cylinder
Removal and installation of the cylinder head covers
Removal, check of a condition and installation of the rockers and bars of pushers
Replacement valve springs, their plates and valve stem seals
Removal and installation of the inlet pipeline
Removal and installation of final collectors
Removing and installing cylinder head
Replacement of a forward epiploon of a cranked shaft
Removal, check of a condition and installation of a cover of the distribution chain, the chain itself and its stars
Removal, check of a condition and installation of a camshaft and hydraulic tappets
Removing and installing sump
Removal, check of a condition and installation of the oil pump
Removal and installation of a flywheel / drive disc
Replacement back radical epiploon
Check and replacement of rubber pillows of support of the engine
Procedure of the general and engine major repairs
Systems of cooling, heating and air conditioning
The power supply system and exhaust
The system of electric motor
Systems of decrease in toxicity of the fulfilled gases and engine management
Manual box of a gear change
Automatic Transmission
Transfer Case
Clutch and transmission line
Brakes
Suspension and steering
Body
The system of on-board electrical equipment
Controls and operation receptions
 


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Removal, check of a condition and installation of a cover of the distribution chain, the chain itself and its stars



Determination of the distribution chain slack (cover - on the engine)

This procedure will allow you to estimate the distribution chain slack without removing it from the engine cover.


PERFORMANCE ORDER

  1. Disconnect the negative wire from the battery.
  2. Bring the piston of the first cylinder of the engine to TDC (Section Bringing in TDC position of first cylinder).
  3. Hold the piston on the compression stroke, set it to about 30 ?� before TDC.
  4. Uncover the distributor (Head of Adjustment and routine maintenance).
  5. In order to ensure the desired accuracy check should turn the crankshaft by hand, very slowly, with the help of half-inch drive with a collar connected to the replacement of sockets required large diameter, worn on the big bolt in the center of the pulley shaft.
  6. Slowly turn the crankshaft clockwise until the first cylinder is moved to the position TDC. While the left part of the distribution chain should sag. Do not turn the shaft on, but do not return it back.
  7. Mark the position on the distributor of his thumb.
  8. Slowly turn the shaft counterclockwise motion before the runner distributor. Stay and the position of the ignition timing marks (distribution), check how far gone the crankshaft from the TDC of first cylinder.
  9. If the label is moved by more than 10 ?�, the distribution chain is worn excessively. For a more accurate test, remove the chain cover.

Removing the cover of the distribution chain

PERFORMANCE ORDER

  1. Disconnect the auxiliary units (such as a pump system hydrostrengthening steering, alternator and air conditioning compressor) that restrict access to the lid of the electrical circuit. Leave the hoses connected to the air conditioning compressor and power-steering pump and secure units in the side (Section Removal and installation of the inlet pipeline).
  2. Remove the bracket mounted units with the front wall of the engine.
  1. Remove the ancillaries, then an arm of the generator / air conditioning compressor.
  1. Remove the water pump (Head of System of cooling, heating and air conditioning).
  2. Give two front oil pan bolt screwed into the chain cover - get to the easiest bolt from under the car.

Despite the fact that this procedure can be performed without removing the oil pan is likely during removal of the cover piece, reinforced with metal pallet lining is damaged. If it does not, the gasket can be used and then after smearing her front in contact with the chain cover of the sealant, but the only reliable guarantee to prevent leaks in the future is to replace the gasket pallet (Section Removal and installation of the oil pan).

  1. Give the remaining fixing bolts and separate the cover from the distribution chain block and oil pan. The lid can be "become attached" to the unit. In this case, using a putty knife to break a layer of sealant between the mating surfaces. DO NOT attempt to separate the cover using the lever - it is easy to damage!

Location cover bolts of the distribution chain.

  1. Remove the pins of the crankshaft the oil separator (if applicable). Remember how the oil separator was installed on the shaft - in the assembly position it should not be changed. It makes sense at this stage to replace the crankshaft front oil seal (Section Replacement of a forward epiploon of a cranked shaft).

Checking the status of the distribution chain and gears (cover is removed from the engine)

PERFORMANCE ORDER

  1. Wear on the bolt camshaft sprocket replaceable face head as part of a torque wrench and attach to the shaft of the torque in the direction of normal rotation (if the cylinder head to the rocker arms are left on the engine torque must be 41 N ??? m if dropped - 20 N ??? m). Do not twist the shaft! With the help of a ruler secure the position of the docking pin on the sprocket chain link and change the direction of torque. Define the offset of the line to vote general movement of the chain. If the offset amount to more than 3 mm, the chain should be replaced.

Replacing the chain involves the replacement of the entire set the timing (chain camshaft sprocket and the crankshaft sprocket).


  1. Attach a line to a circuit for measuring the emerging slack in it at applying torque to the camshaft sprocket bolt.
  1. Check asterisk knee and camshaft for damage and wear.

Removing chain

PERFORMANCE ORDER

  1. Make sure to combine the distribution of labels and give the camshaft sprocket bolt.
  1. Align distribution label stars distributive and cranked shaft.
  1. Remove asterisks of shaft and knee can be produced using trehzahvatnogo puller or two screwdrivers, but care should be taken not to damage the threads in the hole in the end of the crankshaft.
  1. Asterisks distributive and cranked shaft can be removed with the help of three or dvuhzahvatnogo stripper ...

... or two screwdrivers

Setting

PERFORMANCE ORDER

  1. With gasket scraper, remove the mating surfaces of the cover and block all traces of the old gasket material and sealant. Plug the hole in front of the oil pan with a cloth to avoid falling into the engine of foreign objects and debris. Remove the front of the oil pan semicircular rubber seal. Clean the mating surface of the cover with a cloth soaked in acetone.
  2. When installing a new crankshaft sprocket take care of combining its keyway with the key in the pin shaft.

Replacing supply chain is made complete with an asterisk. Installing a new chain on an old sprocket is invalid. Align the keyway with the key, put a star on a pin shaft is pressed into place with a screw with a vibration damper assembly in a large washer. To use the rotation of the bolt head with a removable drive. Alternatively, you can gently begin to knock a star on a pin with a hammer.


In case of resistance to the landing on the shaft sprocket should not use force - even though it can lead to putting on the sprocket, but is fraught with imperceptible damage to components, which are able to develop in the future, cause serious damage to the engine.

  1. Put a new chain on the camshaft sprocket, and then turn the asterisk of the label down. Put the chain on the crankshaft sprocket and install the camshaft sprocket on his journal. If necessary, rotate the camshaft so that its key correctly aligned with the slot for her sprocket rotated junction labeled 6 hours. After installing the chain labels of asterisks should be combined as shown in the

When combining the distribution of labels of asterisks in the TDC is the sixth piston cylinder.


  1. Install the camshaft sprocket with the chain put on her to her seat on the shaft journal by turning in her distribution label (arrow) down.
  1. The key camshaft must be aligned with the slot for her sprocket rotated junction labeled 6 hours (bottom).
  1. Grease the threads of the camshaft sprocket bolt to secure the sealing of threaded connections and tighten bolts with demanded effort.
  2. Lubricate the chain clean motor oil.
  3. If the crankshaft front oil seal may leak, replace it with a new one (Section Replacement of a forward epiploon of a cranked shaft). If a replacement is carried out on the gland is removed from the engine cover of a distributive chain, put the lid on a pair of wooden blocks and knock out her old gland inside using a hammer and punch.

Try not to scratch the stuffing box wall socket and leave them scoring and burrs. Zastuchite new oil seal into the cover with a hammer and interchangeable heads of the appropriate size.

  1. Before replacing the cover, check the whole metal-reinforced gasket oil pan for cuts or deformation. If the gasket is damaged, it must be replaced (see section Removing and installing oil pan) before you begin to install the chain cover.
  2. Coat both sides of the new cover gasket and the angles of the pallet and the block of RTV sealant and attach the gasket to the engine. The sealant will keep her on the block.

If the pan shot to replace the gasket, install the front cover (the cover of the distribution chain) engine before setting down the tray with its seal.

  1. Replace the unit cover distribution chain. Insert the cover bolts (except for those who are used to fasten the water pump) and tighten them by hand.
  2. Install the water pump, replacing it with the gasket and tighten bolts chain cover with demanded effort.
  3. Install the oil pan bolts and push the tray to the chain cover.
  4. Lubricate contact with the surface of the hub gland vibration damper pure impellent oil, then set a damper on the crankshaft pin. Ensure proper alignment of the keyway with the key of the shaft of the damper. If you put a damper on the shaft by hand is not possible, put on his big bolt washer and press-fit the damper on a pin, tightening the bolt socket wrench. Remove the bolt supporting a washer and tighten it with demanded effort.
  5. Further installation is made in the reverse order of removal.
  6. Fill in the cooler and check the motor oil. Start the engine and check for leakage of oil and coolant.




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Removal, check of a condition and installation of a camshaft and hydraulic tappets

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