How to replace the engine coolant thermostat (LF1/LLT) on Cadillac CTS?

Start by draining some fluid from the cooling system before beginning replacement of the engine coolant Thermostat (LF1/LLT). The next step requires you to uninstall the upper Intake Manifold. First disconnect the outlet pipe of the surge tank from the Thermostat housing before removing the coolant pipe/Thermostat housing bolt and the coolant pipe upper bolt. The first step is removing the coolant inlet pipe from the Thermostat before removing the bolts securing the Thermostat and discarding both the Thermostat seal. Bind the new Thermostat plate with its associated new Thermostat seal before installing the Thermostat bolts at 10 nm torque setting (89 lb in). The coolant pipe installation requires a new seal and fasteners (2 and 3) while the surge tank outlet pipe requires connection to the Thermostat before upper Intake Manifold reinstallation. Finally, fill the cooling system.

OEM Cadillac CTS Thermostat

Engine Coolant Thermostat

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11 Thermostats found

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Cadillac CTS Thermostat Part Number: 89018168
$36.41 MSRP: $72.25
You Save: $35.84 (50%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Engine Coolant Thermostat; Thermostat, Engine Coolant Temperature
- Replaces: 89017851
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2009-2015 Cadillac CTS | V | 8 Cyl 6.2 L GAS
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Cadillac CTS Thermostat Housing Part Number: 12678784
$49.62 MSRP: $88.60
You Save: $38.98 (44%)
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Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Thermostat Gasket; Thermostat Unit; Housing, Engine Coolant Thermostat
- Replaced by: 12741007
- Replaces: 12673280, 12647180, 12670209
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016-2019 Cadillac CTS | Luxury, Premium, Premium Luxury | 6 Cyl 3.6 L GAS
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Cadillac CTS Thermostat Housing Part Number: 12674634
$73.67 MSRP: $151.38
You Save: $77.71 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Outlet Assembly-Water Pump (W/Thermostat); Thermostat Housing Cover; Water Outlet; Outlet, Engine Coolant Pump
- Replaces: 12658723, 12670049
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2016-2019 Cadillac CTS | V | 8 Cyl 6.2 L GAS
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Cadillac CTS Thermostat Unit Part Number: 12600171
$24.02 MSRP: $45.12
You Save: $21.10 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature; Thermostat
- Replaces: 12581595
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Cadillac CTS | V | 8 Cyl 5.7 L GAS, 8 Cyl 6.0 L GAS
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Cadillac CTS Thermostat Housing Part Number: 25201447
$61.03 MSRP: $125.38
You Save: $64.35 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Thermostat Gasket; Thermostat; Thermostat Cover; Water Inlet; Housing, Engine Coolant Thermostat
- Replaces: 12651603
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2019 Cadillac CTS | Base, Luxury, Performance, Premium | 4 Cyl 2.0 L GAS
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Cadillac CTS Thermostat Housing Part Number: 12706567
$126.90 MSRP: $260.78
You Save: $133.88 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Housing, Engine Coolant Thermostat
- Replaces: 12584433, 12620259, 12597255, 12573977
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2009 Cadillac CTS | Base | 6 Cyl 3.6 L GAS
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Cadillac CTS Thermostat Housing Part Number: 12706565
$65.18 MSRP: $133.96
You Save: $68.78 (52%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Housing, Engine Coolant Thermostat
- Replaces: 12638184, 12620254, 12652327
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2014-2016 Cadillac CTS | Luxury, Performance, Premium | 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Cadillac CTS Thermostat Part Number: 24420653
Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2004 Cadillac CTS | Base, Luxury, Luxury Sport | 6 Cyl 3.2 L GAS
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Cadillac CTS Thermostat Part Number: 12620250
Product Specifications
- Other Name: Cover
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008 Cadillac CTS | Base | 6 Cyl 3.6 L GAS
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Cadillac CTS Thermostat Part Number: 12586468
Product Specifications
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2004-2007 Cadillac CTS | Base | 6 Cyl 2.8 L GAS, 6 Cyl 3.6 L GAS
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Cadillac CTS Thermostat Housing Part Number: 55353492
Product Specifications
- Other Name: Housing, Engine Coolant Thermostat; Thermostat Housing Cover; Thermostat Housing Gasket; Thermostat
- Replaces: 90502201
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2003-2004 Cadillac CTS | Base, Luxury, Luxury Sport | 6 Cyl 3.2 L GAS

Cadillac CTS Thermostat

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Cadillac CTS Thermostat is one of the car parts that is relevant to the cooling system, commonly located in closeness to the radiator. Although its main purpose is to cool the engine in order for it to perform well, it does plays other important roles. The typical thermostats are the closed-loop control devices that categorize the heat transfer fluids with the help of the set temperature. There have been different types of thermostats used in the past, basic thermostats like the bimetallic strip type, wax pellet type and the pneumatic thermostats. These developments have greatly helped boost the capacities to cool and heat car systems which not only comforts more and perform better.

Cadillac CTS Thermostat Parts and Q&A

Thermostat
89018168
Q: How to replace the engine coolant thermostat (LF1/LLT) on Cadillac CTS?
A:
Start by draining some fluid from the cooling system before beginning replacement of the engine coolant Thermostat (LF1/LLT). The next step requires you to uninstall the upper Intake Manifold. First disconnect the outlet pipe of the surge tank from the Thermostat housing before removing the coolant pipe/Thermostat housing bolt and the coolant pipe upper bolt. The first step is removing the coolant inlet pipe from the Thermostat before removing the bolts securing the Thermostat and discarding both the Thermostat seal. Bind the new Thermostat plate with its associated new Thermostat seal before installing the Thermostat bolts at 10 nm torque setting (89 lb in). The coolant pipe installation requires a new seal and fasteners (2 and 3) while the surge tank outlet pipe requires connection to the Thermostat before upper Intake Manifold reinstallation. Finally, fill the cooling system.