Suzuki Grand Vitara SQ416/SQ420/420WD

since 1998 of release

Repair and car operation

Suzuki Grandee of Wetar
+ General information
+ Maintenance and greasing
+ Heater, ventilation and conditioner
+ Steering
+ Suspension bracket
+ Wheels and tires
+ Forward driving shaft/bearing of a shaft. Oil epiploon
+ Driveshafts
+ Brake system
- Engines
   + Mechanical part of the G16 engine
   + Mechanical part of the J20 engine
   - Engine cooling
      + General description
      + Diagnostics
      + Maintenance
      - Routine maintenance of a vehicle
         Plums of cooling liquid
         Hoses or water pipes of system of cooling
         Belt of the cooling fan
         The cooling fan and the fan coupling
         Water pump
         The sensor of temperature of cooling liquid of the engine (eats)
      Necessary service materials
      Technical characteristics of the rotating moment of an inhaling
+ Fuel system
+ ignition System
+ start System
+ release System
+ Transmissions
+ Coupling
+ Transfer
+ Forward and back differentials
+ Windows, mirrors, locks and security measures. Immobilizer
+ Electric equipment





  1. Merge system of cooling and twirl a drain stopper.
  2. Uncover the thermostat (1).
  3. Clean the thermostat.
G16 engine.

J20 engine.



  1. Be convinced of that the final pneumovalve (1) thermostat the pure. If this valve is littered, the engine will overheat.
  1. Check, that in a saddle of the valve there were no extraneous particles that will prevent the valve to sit strongly.
  2. Check consolidation (2) thermostats and ring-shaped consolidation about breakage, destruction or any other damage.
  3. Check the thermostat as follows:
    • Ship the thermostat (1) in water, and gradually heat up water.
    • Be convinced of that the valve starts to open at a certain temperature. If the valve starts to open at temperature much below or above a certain temperature, the thermostat should be replaced with the new. Such device if it to use repeatedly, will lead to overcooling or overheating.

Temperature at which the valve starts to open

J20 engine: 82 ±2°С (179 ± 3.6°F)

G16 engine: 88 ± 2°С (190 ± 3.6°F)

Temperature at which the valve completely opens

J20 engine: 95°С (203°F)

G16 engine: 100°С (212°F)

Height of lifting of the valve

J20 engine: more, than on 8 mm (0.315 inches) at 95°С (203°F)

G16 engine: more, than on 8 mm (0.315 inches) at 100°С (212°F)

1 — the thermostat
2 — the thermometer
3 — a heater



  1. At installation of the thermostat (1) and ring-shaped consolidation on the thermostat case, establish it so that:
    • The final pneumovalve (2) left on top (G16 engine).
    • The final pneumovalve (2) left on a mark of comparison (3) and in recession of a casing of the thermostat (J20 engine).
  2. Establish a thermostat cover on an inlet collector (G16 engine), the water pump (J20 engine).
  3. Fill cooling system. Address to the Sections Cooling liquid and Washing and filling of system of cooling in this Chapter.
  4. Connect the negative (-) a cable to the accumulator.
  5. After installation check each detail on a leakage.
G16 engine.

J20 engine.