How to replace the water pump (LC3) on Cadillac STS?

The first step to replace lc3 Water Pump requires draining the cooling system. First remove the cooling fan and after that take apart the air-conditioning system and power steering components together with the Water Pump Drive Belt. Disconnect the pulley bolts from the Water Pump and removing both items before proceeding with the Water Pump bolt removal. The process includes setting up a suitable drain pan to capture coolant during Water Pump and seal removal so you can prevent reusing the seal. Check and clean each surface of the Water Pump unit before inspecting it. Set the new Water Pump on its mounting position above the engine and fasten the bolts at 10 nm pressure. The Water Pump Pulley needws installation with bolts that you will tighten to 106 inch lbs (12 Nm). Put back the Drive Belt tensioner and Drive Belt first and then add the cooling fan. Finally, fill the cooling system.

OEM Cadillac STS Water Pump

H2O Pump

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5 Water Pumps found

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Cadillac STS Auxiliary Pump Part Number: 25808860
$155.61 MSRP: $302.00
You Save: $146.39 (49%)
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Product Specifications
- Other Name: Pump, Engine Coolant; Water Pump
- Replaced by: 19436415
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2011 Cadillac STS | Base, Platinum | 6 Cyl 3.6 L GAS
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Cadillac STS Water Pump Part Number: 12595614
$151.34 MSRP: $284.20
You Save: $132.86 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pump, Water; Pump, Engine Coolant
- Replaces: 12563631
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2010 Cadillac STS | Base, Platinum, V | 8 Cyl 4.4 L GAS, 8 Cyl 4.6 L GAS
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Cadillac STS Auxiliary Pump Part Number: 25746579
$131.74 MSRP: $236.30
You Save: $104.56 (45%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Pump, Engine Coolant; Water Pump
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2007 Cadillac STS | Base | 8 Cyl 4.6 L GAS
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Cadillac STS Water Pump Part Number: 12709178
$126.18 MSRP: $380.82
You Save: $254.64 (67%)
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Product Specifications
- Other Name: Pump Kit-Water; Water Pump Assembly; Pump Kit, Engine Coolant
- Replaced by: 12739553
- Replaces: 12645176, 12637479, 12618472, 12657499
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2008-2011 Cadillac STS | Base, Platinum | 6 Cyl 3.6 L GAS
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Cadillac STS Water Pump Part Number: 12566029
Product Specifications
- Other Name: Pump, Water; Oil Pump
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2005-2007 Cadillac STS | Base | 6 Cyl 3.6 L GAS

Cadillac STS Water Pump

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Water Pump is one of the essential parts that aptly capture the essence of automobiles and the brand itself. Manufactured to pump coolant through the engine's water jacket, Water Pump is involved in regulating engine temperatures and transferring heat to the radiator. This functionality is crucial in increasing the productivity and reliability of the Cadillac STS, with regards to the flow of the engine at various parameters. Applicable for numerous STS models the Water Pump used to be made with cast iron but has shifted to lighter and more efficient aluminum castings. Also, some Caddy STS models now use electric water pumps that reduce power loss and enhance coolant flow according to the engine temperature. The Water Pump is not only about the specifics of the automobile; it also has specifications that are particular to high performance models to include enhanced figures of coolant flow that enhance on the engine's performance, though escalating power consumption. This feature is particularly will be of great help to Cadillac STS-V which is a car with super charged engine. In conclusion, the Water Pump can be distinguished in the automotive market thanks to its features such as uniqueness, compatibility with the number of Cadillac models, and importantly, the critical importance to the long-term use and proper functioning of the Cadillac vehicle, thanks to which the Water Pump guarantees a great experience in the use of the Cadillac car.

Cadillac STS Water Pump Parts and Q&A

Water Pump
12595614
Q: How to replace the water pump (LC3) on Cadillac STS?
A:
The first step to replace lc3 Water Pump requires draining the cooling system. First remove the cooling fan and after that take apart the air-conditioning system and power steering components together with the Water Pump Drive Belt. Disconnect the pulley bolts from the Water Pump and removing both items before proceeding with the Water Pump bolt removal. The process includes setting up a suitable drain pan to capture coolant during Water Pump and seal removal so you can prevent reusing the seal. Check and clean each surface of the Water Pump unit before inspecting it. Set the new Water Pump on its mounting position above the engine and fasten the bolts at 10 nm pressure. The Water Pump Pulley needws installation with bolts that you will tighten to 106 inch lbs (12 Nm). Put back the Drive Belt tensioner and Drive Belt first and then add the cooling fan. Finally, fill the cooling system.