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
- Systems of cooling, heating and air conditioning
   General information
   Antifreeze - the general information
   Check of functioning and thermostat replacement
   Check of serviceability and replacement of the fan of system of cooling and coupling of its coupling
   Check of functioning and replacement of the block of the sensor of temperature of a cooler
   Removal and installation of a radiator and broad tank of system of cooling
   Check of functioning of the water pump
   Removal and installation of the water pump
   Check of serviceability of an electric contour and replacement of components of the motor of the fan of a heater and air conditioner
   Removal and installation of the block of the fan of a heater
   Removal and installation of assembly of management by a heater and air conditioner
   Removal and installation of the heat exchanger of a heater
   Check of serviceability and service of systems of heating and air conditioning
   Diagnostics of system of automatic control in temperature (automatic telephone exchange) without its removal from the car
   Removal and installation of the accumulator (store) of central air of air
   Removal and installation of the compressor of central air of air
   Removal and installation of the condenser of central air of air
   Removal and installation of a tube of the calibrated jet
   Removal and installation of the evaporator of central air
+ 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

Check of functioning and thermostat replacement

Do not uncover a radiator, do not merge a cooler of system and do not make thermostat replacement until the engine completely will not cool down.

Functioning check


  1. Before coming to a conclusion about that problems in system of cooling are connected with failure of the thermostat, check cooler level, a tension of a driving belt (Head of Control and routine maintenance) and serviceability of a measuring instrument (or a control lamp) temperatures.
  2. If there are suspicions (based on indications of a measuring instrument of temperature or speed of the beginning of giving by a heater in salon of hot air) that the warming up of the engine lasts too long, it is possible to assume that there was a thermostat jamming in open situation. Replace the thermostat new, or obviously serviceable.
  3. If the engine starts to overheat, feel a hand the top hose of a radiator. When the hose is not heated up, and the engine hot, the thermostat most likely is jammed in a closed position and blocks cooler circulation through a radiator. Replace the thermostat.

It is not necessary to continue car operation with the removed thermostat. The board computer thus can pass to a mode of an open contour when tracking toxicity of the fulfilled gases stops and fuel consumption optimization is broken.

  1. If the top hose of a radiator is heated up, it means that the thermostat is open and there is a normal circulation of a cooler through a radiator. In this case apply for information to the Section Diagnostics of malfunctions at the beginning of this Management.



  1. Disconnect a negative wire from the battery.
  2. Empty cooling system (Head of Control and routine maintenance). If the cooler was filled in it only recently, or is in a satisfactory condition, keep it for a reuse.
  3. For detection of location of the thermostat, track a way of laying of the top hose of a radiator.
  1. Weaken a collar (ы) and disconnect a hose (and) from the union (ов). If the hose "became attached", grasp it closer to the end самоконтрящимися pincers and try повращать it on the union, then, in case of success, remove a hose from the union. If the hose is strongly damaged as a result of material aging, cut off it from the union and at assembly replace new.
  1. If the external surface of the big union which the hose is put on is damaged as a result of impact of corrosion, it can undergo further destruction in the course of hose removal. In that case the cover of the case of the thermostat should be replaced.
  2. Give bolts and uncover thermostat cases. If the cover "became attached", обстучите it for release by a hammer with soft the brisk. Be ready to the passage of a certain quantity of a cooler at laying destruction.
  1. After a hose detachment (ов) give bolts (shooters) and remove the case from the engine - the case of the thermostat of the V8 engine is shown located behind a support of one of hinged units.
Location on the 6-cylinder engine.
  1. Remember how (up) the thermostat was established by what end face, then remove it.
  2. To Zakuporta rags an opening in the engine, then scratch out all traces of a material of old laying and hermetic from interfaced surfaces of the case of the thermostat and a head cover. Take rags from an opening and wipe interfaced surfaces acetone.
  3. Establish in the case the new thermostat. Track correctness of orientation of the thermostat at installation - the end equipped with a spring should be directed to the engine.
  4. Apply a thin film RTV hermetic on both parties of new laying and establish laying on the case.
  5. Establish into place a cover and bolts. Tighten bolts with demanded effort.
  6. Connect a hose (and) to the union (ам) and reliably fix it (them) a collar (ами).
  7. Fill cooling system (Head of Control and routine maintenance).
  8. Start the engine, let's to it get warm to normal working temperature, then Make sure of absence of leakages of a cooler and check serviceability of functioning of the thermostat (see item 2-4).