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How do i remove a thermostate on a 2001 chevy cavilier

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  • Master
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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 or 24 months.

  1. Disconnect the negative battery cable.
  2. Properly drain and recover the coolant until the level is below the thermostat.
  3. Unfasten the coolant outlet-to-inlet manifold attaching bolt and nut, then remove the outlet.
  4. Remove the thermostat. Clean the inlet manifold and outlet mating surfaces. To install:
  5. Install a new O-ring onto the thermostat
  6. Place the thermostat in the inlet manifold.
  7. Attach the coolant outlet to the inlet manifold, using the bolt and nut. Tighten to 89 inch lbs. (10 Nm).
  8. Refill the engine cooling system.
  9. Connect the negative battery cable, then start the engine and check for coolant leaks.
2.3L and 2.4L Engines 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 or 24 months.
  1. Disconnect the negative battery cable.
  2. Properly drain and recover the coolant to a level below the thermostat.
  3. Unfasten the cover-to-outlet pipe bolt, which is accessible through the exhaust manifold runners.
  4. Raise and safely support the vehicle.
  5. Disconnect the radiator and heater hoses from the outlet pipe.
  6. Unfasten the outlet pipe-to-oil pan bolt and the cover-to-outlet pipe bolts.
  7. Remove the thermostat, then clean the old gasket material from the mating surfaces. To install:
  8. Position the thermostat in its correct location, then install the cover-to-outlet pipe bolt. Tighten the bolt to 10 ft. lbs. (14 Nm).
  9. 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).
  10. Connect the radiator and heater hoses to the outlet pipe.
  11. Carefully lower the vehicle.
  12. Install the cover-to-outlet pipe bolt through the exhaust manifold runner.
  13. Properly fill the cooling system, then connect the negative battery cable.
The thermostat is located in the lower radiator hose on the 2.2L engine


how do i remove a - tecnovative_165.gif


Thermostat removal and installation - 2.3L and 2.4L engines


Posted on Mar 18, 2011

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  • Chevrolet Master
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The housing for the thermostat for this vehicle is on the lower radiator hose. Follow the hose to a black housing attached to a cast aluminum housing. The front of this housing seperates by two 8mm bolts revealing the thermostat. The cast housing is easy to spot. It is directly underneath the alternator and to the right of the exhaust manifold. Some models have a heat shield over the manifold that must be removed for easy access. The cast housing routes directly to the motor and has several bypass hoses routed thru it. Remove the two 8mm bolts and remove the top of the housing and the thermostat is inside the housing. Pay attention to how it inside the housing as this will be the way the new one goes back in. Clean both sides of the housing well to insure a good clean seal upon replacing. Make sure you use a gasket and a sealant when you replace the housing.

Posted on Mar 18, 2011

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