Thermostat

Tiny
HAWK1252
  • MEMBER
  • 2009 CHEVROLET COBALT
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 110,000 MILES
How do I change the thermostat on my 2009 chevy cobalt? AC stopped working and the engine light came on. Autozone says the engine light was for the thermostat and ac switch gone bad. I am not a car guy and have no idea how to do this on my own and I was wondering if this was something I could attempt to fix by myself with some instruction or a video.
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Thursday, July 2nd, 2015 AT 10:26 PM

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Tiny
WRENCHTECH
  • MEMBER
Hello,

Here is the thermostat location and a guide to walk you through the steps on how to change it out with diagrams below to show you on your car.

https://www.2carpros.com/articles/replace-thermostat

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Friday, July 3rd, 2015 AT 2:17 AM
Tiny
JGALLAGHER1957@GMAIL.COM
  • MEMBER
  • 2006 CHEVROLET COBALT
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 82,000 MILES
How do I change the thermostat on a 2006 Chevy Cobalt
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Friday, December 28th, 2018 AT 11:24 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • EXPERT
It is based on which 4 cylinder you have. Here are directions from AZ that I was able to get:

2.0L Engine

Before servicing the vehicle, refer to the Precautions Section.
Drain the cooling system.

Fig. Location of radiator surge tank outlet hose clamp & oil cooler inlet and outlet hose clamps at the thermostat cover-2.0L engine

Reposition the radiator surge tank outlet hose clamp (1) at the thermostat cover.
Remove the radiator surge tank outlet hose from the thermostat cover.
Reposition the oil cooler inlet and outlet hose clamps (2) and (3) at the thermostat cover.
Remove the oil cooler inlet and outlet hoses from the thermostat cover.
Remove the thermostat cover bolts and cover.
Remove the thermostat.
Remove and discard the thermostat cover O-ring seal.

Fig. Removing the thermostat cover bolts, cover, thermostat, and O-ring seal-2.0L engine

To install:

Install or connect the following:

A NEW thermostat cover O-ring seal into the recess groove The thermostat The thermostat cover bolts and tighten to 89 inch lbs. (10 Nm) The oil cooler inlet and outlet hoses to the thermostat cover The oil cooler inlet and outlet hose clamps at the thermostat cover The radiator surge tank outlet hose to the thermostat cover The radiator surge tank outlet hose clamp at the thermostat cover

Fill the cooling system and check for leaks.

2.2L & 2.4L Engines

Before servicing the vehicle, refer to the Precautions Section.
Remove the intake manifold cover:
Remove the engine oil fill cap.
Grasp the intake manifold cover by the lower right inboard corner and pull up to disengage the cover from the stud.
Grasp the intake manifold cover by the upper left corner and pull up to disengage the cover from the stud.
Remove the intake manifold cover.

Fig. Location of radiator outlet hose clamp (1) at thermostat cover for the removal of the radiator outlet hose from the thermostat cover-2.2L & 2.4L engines

Drain the cooling system.
Reposition the radiator outlet hose clamp at the thermostat cover.
Remove the radiator outlet hose from the thermostat cover.
Reposition the radiator surge tank outlet hose clamp at the thermostat cover.
Remove the radiator surge tank outlet hose from the thermostat cover.
Reposition the radiator outlet hose clamp (1) at the thermostat cover.
Remove the radiator outlet hose from the thermostat cover.
Remove the thermostat cover bolts and cover.
Remove the thermostat.
Remove and discard the thermostat cover O-ring seal.

Fig. Location of thermostat cover bolts for removal of the thermostat and thermostat cover O-ring seal-2.2L & 2.4L engines

To install:

Install or connect the following:

A NEW thermostat cover O-ring seal The thermostat The thermostat cover bolts. Tighten the bolts to 89 inch lbs. (10 Nm) The radiator outlet hose to the thermostat cover The radiator outlet hose clamp at the thermostat cover The radiator surge tank outlet hose to the thermostat cover The radiator surge tank outlet hose clamp at the thermostat cover The radiator outlet hose to the thermostat cover The radiator outlet hose clamp at the thermostat cover

Fill the cooling system.
Install the intake manifold cover:
Place the intake manifold cover onto the engine over the studs.
Push down on the intake manifold cover directly over the lower right stud in order to engage the cover to the stud.
Push down on the intake manifold cover directly over the upper left stud in order to engage the cover to the stud.
Install the engine oil fill cap.
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Friday, December 28th, 2018 AT 11:24 AM (Merged)

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