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
+ Engine V8
+ Procedure of the general and engine major repairs
- Systems of cooling, heating and air conditioning
   The 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 муфты its couplings
   Check of functioning and replacement of the block of the gauge 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 assemblage 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 a central air of air
   Removal and installation of the compressor of a central air of air
   Removal and installation of the condenser of a central air of air
   Removal and installation of a tube of the calibrated jet
   Removal and installation of the evaporator of a central air
+ 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


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


    Before coming to a conclusion about that problems in cooling system are connected with thermostat refusal, check up cooler level, a tension drive a belt (the Head of Adjustment and routine maintenance) and serviceability of a measuring instrument (or a control lamp) temperatures. 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 engine warming up lasts too long it is possible to assume that there was a thermostat jamming in open position. Replace the thermostat new, or obviously serviceable. If the engine starts to overheat, feel a hand the top hose of a radiator. When the hose not нагрет, and the engine hot the thermostat most likely is jammed in the closed position and blocks cooler circulation through a radiator. Replace the thermostat.

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

    If the top hose of a radiator нагрет, it means that the thermostat is opened and there is a normal circulation of a cooler through a radiator. In this case apply for information to Section Diagnostics of malfunctions in the beginning of the given Management.



    Disconnect a negative wire from the battery. Empty cooling system (the Head of Adjustment and routine maintenance). If the cooler has been filled in it only recently, or is in a satisfactory condition, keep it for a reuse. For detection of a site of the thermostat, track a way of a lining of the top hose of a radiator.
    Loosen the a collar () also disconnect a hose () from the union (ов). If the hose "has become attached", grasp it more close by the end самоконтрящимися pincers and try повращать it on the union, then, in case of good luck, remove a hose from the union. If the hose is strongly damaged as a result of material ageing, cut off it from the union and at assemblage replace new.
    If the external surface of the big union which the hose is put on is damaged as a result of corrosion influence, it can undergo to the further destruction in the course of hose removal. In that case the cover of the case of the thermostat should be replaced. Give bolts and uncover thermostat cases. If the cover "has become attached", обстучите it for clearing by a hammer with soft the brisk. Be ready to passage of certain quantity of a cooler at lining destruction.
    After a hose detachment (ов) give bolts (arrows) and remove the case from the engine - the case of the thermostat of engine V8 is shown located behind a support of one of hinged units.
Site on the 6-cylinder engine.
    Remember how (upwards) the thermostat has been established by what end face, then remove it. Закупорьте rags an aperture in the engine, then scratch out all traces of a material of an old lining and hermetic from interfaced surfaces of the case of the thermostat and a head cover. Take rags from an aperture and wipe interfaced surfaces acetone. 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. Apply a thin film hermetic RTV on both parties of a new lining and establish a lining on the case. Establish into place a cover and bolts. Tighten bolts with demanded effort. Connect a hose () to the union (ам) and reliably fix (their) its collar (ами). Fill cooling system (the Head of Adjustment and routine maintenance). Start the engine, allow to it to get warm to normal working temperature, then Make sure of absence of leaks of a cooler and check up serviceability of functioning of the thermostat (item 2 - 4 see).