How to replace the thermostat (RPO L61) on Chevrolet Cobalt?

To replace the Thermostat (RPO L61), start by pulling the intake manifold cover, and drain the cooling system. Move the radiator outlet hose clamp up from the Thermostat housing, then move the radiator outlet hose off the Thermostat housing. If required, remove the Thermostat cover bolts and cover, the Thermostat itself to be removed and discard the Thermostat cover o-ring seal if available. For installation, position a new Thermostat cover o-ring seal into the recess groove and install the Thermostat. Install the Thermostat cover bolts, while tightening them to 10 n.m (89 lb in), and attach the radiator outlet hose to the Thermostat housing and find the position of the radiator outlet hose clamp at the thermostate housing. Refill the cooling system and lastly, re-install the cover of the intake manifold.

OEM Chevrolet Cobalt Thermostat

Engine Coolant Thermostat

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Chevrolet Cobalt Thermostat Housing, Green Line Part Number: 12597172
$93.11 MSRP: $191.35
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Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Engine Coolant Thermostat Housing; Thermostat Housing Cover; Water Manifold; Housing, Engine Coolant Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2006-2010 Chevrolet Cobalt | Base, LS, LT, LTZ, Sport, SS | 4 Cyl 2.2 L GAS, 4 Cyl 2.4 L GAS
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Chevrolet Cobalt Thermostat, Green Line Part Number: 12622410
$69.04 MSRP: $153.83
You Save: $84.79 (56%)
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Product Specifications
- Other Name: Thermostat Assembly-Engine Coolant; Thermostat Kit, Engine Coolant Temperature; Thermostat, Engine Coolant Temperature
- Replaces: 21018811, 55350941, 90537453, 12615097
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2010 Chevrolet Cobalt | Base, LS, LT, LTZ, Sport, SS | 4 Cyl 2.0 L GAS, 4 Cyl 2.2 L GAS, 4 Cyl 2.4 L GAS
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Chevrolet Cobalt Thermostat Housing Part Number: 12605853
$99.70 MSRP: $204.86
You Save: $105.16 (52%)
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Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Housing, Engine Coolant Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2010 Chevrolet Cobalt | SS | 4 Cyl 2.0 L GAS
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Chevrolet Cobalt Thermostat Housing Part Number: 12590275
Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Housing, Engine Coolant Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008 Chevrolet Cobalt | SS | 4 Cyl 2.0 L GAS
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Chevrolet Cobalt Thermostat Housing Part Number: 12584898
Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Housing, Engine Coolant Thermostat
- Replaces: 13104425
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005 Chevrolet Cobalt | Base, LS, LT | 4 Cyl 2.2 L GAS
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Chevrolet Cobalt Thermostat Housing Part Number: 12583152
Product Specifications
- Other Name: Housing, Engine Coolant Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2007 Chevrolet Cobalt | SS | 4 Cyl 2.0 L GAS

Chevrolet Cobalt Thermostat

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Cobalt Thermostat is one of the Chevrolet Cobalt parts of a car cooling system; usually it is located close to the radiator. The cooler's main purpose is to control the temperature in the engine for better and improved performance. Thermostats are feedback control devices that measure the desired temperature or set point and regulate the temperature majorly used in homes and industries. Various kinds of thermostats have been used over the years like the mechanical and pneumatic thermostats, wax pellet thermostats for automobile systems. These devices enable the regulation of heating and cooling for purpose of overall comfort and optimization in several uses.

Chevrolet Cobalt Thermostat Parts and Q&A

Thermostat Housing, Green Line
12597172
Q: How to replace the thermostat (RPO L61) on Chevrolet Cobalt?
A:
To replace the Thermostat (RPO L61), start by pulling the intake manifold cover, and drain the cooling system. Move the radiator outlet hose clamp up from the Thermostat housing, then move the radiator outlet hose off the Thermostat housing. If required, remove the Thermostat cover bolts and cover, the Thermostat itself to be removed and discard the Thermostat cover o-ring seal if available. For installation, position a new Thermostat cover o-ring seal into the recess groove and install the Thermostat. Install the Thermostat cover bolts, while tightening them to 10 n.m (89 lb in), and attach the radiator outlet hose to the Thermostat housing and find the position of the radiator outlet hose clamp at the thermostate housing. Refill the cooling system and lastly, re-install the cover of the intake manifold.