GM Malibu/Cutlass 1997-2000

Thermostat

Imprimir

REMOVAL & INSTALLATION




NOTE
When adding coolant, it is important that you use GM Goodwrench DEX-COOL® (orange colored, silicate free) coolant meeting GM specifications. On these vehicles, if silicated coolant is added to the system, premature engine, heater core or radiator corrosion may result. In addition, the engine coolant will require change sooner; at 30,000 miles (48,000km) or 24 months.


CAUTION
Never open, service or drain the radiator or cooling system when hot; serious burns can occur from the steam and hot coolant. Also, when draining engine coolant, keep in mind that cats and dogs are attracted to ethylene glycol antifreeze and could drink any that is left in an uncovered container or in puddles on the ground. This will prove fatal in sufficient quantities. Always drain coolant into a sealable container. Coolant should be reused unless it is contaminated or is several years old.

2.4L Engine
  1. Disconnect the negative battery cable.
  2.  
  3. Properly drain and recover the coolant to a level below the thermostat.
  4.  
  5. Unfasten the cover-to-outlet pipe bolt, which is accessible through the exhaust manifold runners.
  6.  
  7. Raise and safely support the vehicle.
  8.  
  9. Disconnect the radiator and heater hoses from the outlet pipe.
  10.  
  11. Unfasten the outlet pipe-to-oil pan bolt and the cover-to-outlet pipe bolts.
  12.  
  13. Remove the thermostat, then clean the old gasket material from the mating surfaces.
  14.  



Click image to see an enlarged view

Fig. Exploded view of the thermostat removal and installation-2.4L engine

To install:

  1. Position the thermostat in its correct location, then install the cover-to-outlet pipe bolt. Tighten the bolt to 10 ft. lbs. (14 Nm).
  2.  
  3. Install the outlet pipe-to-oil pan bolt. Tighten the pipe-to-oil pan bolt to 19 ft. lbs. (26 Nm) and the pipe-to-transaxle bolt to 40 ft. lbs. (54 Nm).
  4.  
  5. Connect the radiator and heater hoses to the outlet pipe.
  6.  
  7. Carefully lower the vehicle.