How to replace the water pump on the LS4 engine on Buick LaCrosse?

You need to drain the cooling system before you can replace the Water Pump 300 on the ls4 engine. Start by taking off the battery power and tray, combined with the Drive Belt. Unwind the Water Pump bolts (318) and remove the Water Pump (300) unit attached to its gasket (314). Dispose of the obsolete gasket during the process. Check the Water Pump matching surfaces for repair before installing the new gasket set. After fitting a new Water Pump (300) with a fresh gasket (314) set it into place properly before turning the Water Pump bolts (318) up to 10 n.m (89 lb in). Put back the Drive Belt afterward set the battery tray and battery into place. End the repair by filling up the cooling system.

How to replace the water pump on a 3.8L engine on Buick Regal?

Before replacing the Water Pump for a 3.8l engine start by removing part of the cooling system fluid then moving the accessory wiring junction block. Install the hose clamp pliers (J 38185) to loosen Water Pump Pulley bolts before you detach the Drive Belt and bolts to take off the wheel shaft. First remove the Power Steering Pump mounting bolts before repositioning it. Then disconnect the Water Pump bolts and take off the Water Pump along with its gasket. Determine if the Water Pump mating surfaces need cleaning before inspecting the area. Start with both components on the Water Pump before you employ the torque angle meter (J 36660-A) to tighten bolt sets gradually. Work on long bolts first at 20 nm (15 ft. Lbs.) plus 40 degrees and short bolts afterwards at 15 nm (11 ft. Lbs.) plus 80 degrees. Attach the Water Pump Pulley loosely before adding its bolts and installing the Power Steering Pump with its bolts. Put the Drive Belt back in its place before securing the Water Pump Pulley bolts at 13 nm. Put back the accessory wiring junction block before filling the cooling system with fluid.

How to replace a water pump on Buick LeSabre?

A new Water Pump needs you to drain engine coolant and disconnect the Drive Belt first. Detach the bolts from both the Water Pump Pulley before removing the parts. Next disconnect both Water Pump mounting bolts (1 and 2) followed by removing the Water Pump. Check both sides of where the Water Pump fits and examine the Water Pump units. Use a new gasket to fit the Water Pump on the engine and tighten the bolts (1, 2) using the short bolts at 15 nm (11 ft. Lbs.) and the long bolts at 30 nm (22 ft. Lbs.). Attach the Water Pump Pulley with its bolts before tightening them to 13 nm (115 inch lbs.). Reinstall the Drive Belt and refill the cooling system later.

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52 Water Pumps found

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Buick Auxiliary Pump
Part Number: 13592753
$39.23 MSRP: $61.46
You Save: $22.23 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump, Heater Coolant; Water Pump; Pump; Pump, Heater Coolant Flow; Pump, Heater
Fits the following Buick Models:
- LaCrosse | 2017-2019 | Avenir, Base, Essence, Preferred, Premium, Sport Touring | 6 Cyl 3.6 L GAS
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Buick Water Pump
Part Number: 12537495
$33.09 MSRP: $179.32
You Save: $146.23 (82%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pump Kit, Engine Coolant; Water Pump Assembly
- Replaces: 12537892, 12536421
Fits the following Buick Models:
- Century | 1986-1990 | Custom, Estate Wagon, Limited, T-Type | 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 3.3 L GAS, 6 Cyl 3.8 L GAS
- Electra | 1986-1990 | Limited, Park Avenue, Park Avenue Ultra, T-Type | 6 Cyl 3.8 L GAS
- LeSabre | 1986-1990 | Base, Custom, Limited, T-Type | 6 Cyl 3.0 L GAS, 6 Cyl 3.8 L GAS
- Reatta | 1988-1990 | Base | 6 Cyl 3.8 L GAS
- Regal | 1986 | Base, Grand National, Limited, T-Type | 6 Cyl 3.8 L GAS
- Riviera | 1986-1990 | Luxury, T-Type | 6 Cyl 3.8 L GAS
- Skylark | 1985-1990 | Custom, Gran Sport, Limited, Luxury Edition | 6 Cyl 2.8 L GAS, 6 Cyl 3.0 L GAS, 6 Cyl 3.3 L GAS
- Somerset | 1986-1987 | Custom, Limited, T-Type | 6 Cyl 3.0 L GAS
- Somerset Regal | 1985 | Base, Limited | 6 Cyl 3.0 L GAS
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Buick Water Pump Housing
Part Number: 25204277
$124.75 MSRP: $223.77
You Save: $99.02 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Water Pump; Water Pump Assembly; Pump, Engine Coolant
- Replaces: 55505441, 55515877
Fits the following Buick Models:
- Encore GX | 2020-2024 | Essence, Preferred, Select | 3 Cyl 1.2 L GAS
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Buick Water Pump
Part Number: 25201445
$178.59 MSRP: $320.34
You Save: $141.75 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Water Pump Assembly
- Replaces: 25201243
Fits the following Buick Models:
- LaCrosse | 2018-2019 | Base, Essence, Preferred, Premium | 4 Cyl 2.5 L MILD HYBRID EV-GAS (MHEV)
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Buick Auxiliary Pump
Part Number: 13546434
$65.95 MSRP: $117.76
You Save: $51.81 (44%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assembly-Auxiliary Water; Pump, Heater Coolant Flow; Pump, Engine Coolant
- Replaced by: 13551861
Fits the following Buick Models:
- Enclave | 2021-2024 | Avenir, Essence, Preferred, Premium | 6 Cyl 3.6 L GAS
- Encore GX | 2023 | Essence, Preferred, Select | 3 Cyl 1.2 L GAS
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Buick Water Pump
Part Number: 12482919
$74.63 MSRP: $133.27
You Save: $58.64 (44%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Kit, Water; Water Pump Assembly; Pump Kit, Engine Coolant
- Replaces: 12537417, 12537135
Fits the following Buick Models:
- Century | 1991-1993 | Custom, Limited, Special | 4 Cyl 2.2 L GAS, 4 Cyl 2.5 L GAS, 6 Cyl 3.3 L GAS
- LeSabre | 1991-1995 | Base, Custom, Limited | 6 Cyl 3.8 L GAS
- Park Avenue | 1991-1995 | Base, Ultra | 6 Cyl 3.8 L GAS
- Reatta | 1991 | Base | 6 Cyl 3.8 L GAS
- Regal | 1990-1995 | Custom, Gran Sport, Limited | 6 Cyl 3.8 L GAS
- Riviera | 1995, 1991-1993 | Base, Luxury | 6 Cyl 3.8 L GAS
- Skylark | 1991-1993 | Base, Custom, Gran Sport, Limited, Luxury Edition | 6 Cyl 3.3 L GAS
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Buick Water Pump
Part Number: 12673412
$170.31 MSRP: $333.44
You Save: $163.13 (49%)
Ships in 1-2 Business Days
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Product Specifications
- Replaced by: 25205820
Fits the following Buick Models:
- Encore | 2016-2017 | Base, Convenience, Essence, Leather, Preferred, Preferred II, Premium, Sport Touring | 4 Cyl 1.4 L GAS
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Buick Auxiliary Pump
Part Number: 42492417
$95.31 MSRP: $178.98
You Save: $83.67 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Pump Assembly-Auxiliary Water
- Replaces: 95383966
Fits the following Buick Models:
- Encore | 2022, 2016-2019 | Base, Convenience, Essence, Leather, Preferred, Preferred II, Premium, Sport Touring | 4 Cyl 1.4 L GAS
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Buick Water Pump
Part Number: 12724522
$174.84 MSRP: $342.30
You Save: $167.46 (49%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump, Water (Module); Water Pump Assembly; Pump, Engine Coolant
- Replaced by: 12738953
- Replaces: 55506790, 55515497, 55510113, 55508939
Fits the following Buick Models:
- Envision | 2021-2023 | Avenir, Essence, Preferred | 4 Cyl 2.0 L GAS
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Buick Water Pump
Part Number: 25204309
$170.31 MSRP: $333.44
You Save: $163.13 (49%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Water Pump Assembly; Housing
- Replaced by: 25205820
Fits the following Buick Models:
- Encore | 2016-2022 | Base, Essence, Preferred, Preferred II, Premium, Sport Touring | 4 Cyl 1.4 L GAS
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Buick Water Pump
Part Number: 13592749
$108.76 MSRP: $194.22
You Save: $85.46 (44%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Pump Assembly-Auxiliary Water; Auxiliary Pump; Pump, Heater Coolant Flow; Pump, Generator Drive; Pump, Engine Coolant
Fits the following Buick Models:
- LaCrosse | 2018-2019 | Avenir, Base, Essence, Preferred, Premium, Sport Touring | 4 Cyl 2.5 L MILD HYBRID EV-GAS (MHEV), 6 Cyl 3.6 L GAS
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Buick Water Pump
Part Number: 12620226
$145.44 MSRP: $260.88
You Save: $115.44 (45%)
Product Specifications
- Other Name: Pump, Water; Pump, Engine Coolant
- Replaces: 24576952
Fits the following Buick Models:
- Rainier | 2004-2007 | CXL, CXL Plus | 6 Cyl 4.2 L GAS
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Buick Water Pump
Part Number: 12481997
Product Specifications
- Other Name: Pump Kit, Water; Water Pump Housing; Water Pump Assembly; Housing; Body; Pump; Pump, Engine Coolant
- Replaces: 12360448
Fits the following Buick Models:
- Century | 1984-1986 | Custom, Estate Wagon, Limited, T-Type | 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 3.0 L GAS, 6 Cyl 3.8 L GAS, 6 Cyl 4.3 L DIESEL
- Skylark | 1987-1991, 1984-1985 | Base, Custom, Gran Sport, Limited, Luxury Edition | 4 Cyl 2.5 L GAS
- Somerset | 1987 | Custom, Limited | 4 Cyl 2.5 L GAS
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Buick Water Pump
Part Number: 12458922
Product Specifications
- Other Name: Pump Kit, Water; Water Pump Assembly; Pump Kit, Engine Coolant
- Replaces: 10174846, 12522034
Fits the following Buick Models:
- Commercial Chassis | 1991-1993 | Base | 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS
- Roadmaster | 1991-1993 | Base, Estate Wagon, Limited | 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS
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Buick Water Pump
Part Number: 89018039
Product Specifications
- Other Name: Pump Kit, Water; Water Manifold; Pump Kit, Engine Coolant
- Replaces: 12569247, 12604750
Fits the following Buick Models:
- LaCrosse | 2008-2009 | Super | 8 Cyl 5.3 L GAS
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Buick Water Pump
Part Number: 12707765
$164.95 MSRP: $295.88
You Save: $130.93 (45%)
Product Specifications
- Replaced by: 25208565
Fits the following Buick Models:
- Encore GX | 2020-2024 | Avenir, Essence, Preferred, Select, Sport Touring | 3 Cyl 1.3 L GAS
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Buick Water Pump
Part Number: 55505442
$108.73 MSRP: $194.17
You Save: $85.44 (44%)
Fits the following Buick Models:
- Encore GX | 2020-2024 | Essence, Preferred, Select | 3 Cyl 1.2 L GAS
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Buick Water Pump
Part Number: 12709178
$208.24 MSRP: $373.52
You Save: $165.28 (45%)
Product Specifications
- Other Name: Pump Kit-Water; Water Pump Assembly; Pump Kit, Engine Coolant
- Replaces: 12645176, 12637479, 12618472, 12657499
Fits the following Buick Models:
- Enclave | 2008-2024 | Avenir, Base, Convenience, CX, CXL, Essence, Leather, Preferred, Premium | 6 Cyl 3.6 L GAS
- LaCrosse | 2010-2016, 2008 | Base, Convenience, CX, CXL, CXS, Leather, Premium, Sport Touring, Touring | 6 Cyl 3.0 L GAS, 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS
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Buick Water Pump
Part Number: 12566029
Product Specifications
- Other Name: Pump, Water; Oil Pump
Fits the following Buick Models:
- LaCrosse | 2005-2007 | CXS | 6 Cyl 3.6 L GAS
- Rendezvous | 2004-2006 | CX, CXL, CXL Plus, Ultra | 6 Cyl 3.6 L GAS
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Buick Water Pump
Part Number: 12600767
Product Specifications
- Other Name: Pump, Water; Engine Water Pump; Water Pump Assembly
- Replaces: 12587305
Fits the following Buick Models:
- Rainier | 2007 | CXL | 8 Cyl 5.3 L GAS

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1-20 of 52 Results

Buick Water Pump Parts Questions & Experts Answers

Water Pump
12709178
Q: How to replace the water pump on the LS4 engine on Buick LaCrosse?
A: You need to drain the cooling system before you can replace the Water Pump 300 on the ls4 engine. Start by taking off the battery power and tray, combined with the Drive Belt. Unwind the Water Pump bolts (318) and remove the Water Pump (300) unit attached to its gasket (314). Dispose of the obsolete gasket during the process. Check the Water Pump matching surfaces for repair before installing the new gasket set. After fitting a new Water Pump (300) with a fresh gasket (314) set it into place properly before turning the Water Pump bolts (318) up to 10 n.m (89 lb in). Put back the Drive Belt afterward set the battery tray and battery into place. End the repair by filling up the cooling system.
Water Pump
19209288
Q: How to replace the water pump on a 3.8L engine on Buick Regal?
A: Before replacing the Water Pump for a 3.8l engine start by removing part of the cooling system fluid then moving the accessory wiring junction block. Install the hose clamp pliers (J 38185) to loosen Water Pump Pulley bolts before you detach the Drive Belt and bolts to take off the wheel shaft. First remove the Power Steering Pump mounting bolts before repositioning it. Then disconnect the Water Pump bolts and take off the Water Pump along with its gasket. Determine if the Water Pump mating surfaces need cleaning before inspecting the area. Start with both components on the Water Pump before you employ the torque angle meter (J 36660-A) to tighten bolt sets gradually. Work on long bolts first at 20 nm (15 ft. Lbs.) plus 40 degrees and short bolts afterwards at 15 nm (11 ft. Lbs.) plus 80 degrees. Attach the Water Pump Pulley loosely before adding its bolts and installing the Power Steering Pump with its bolts. Put the Drive Belt back in its place before securing the Water Pump Pulley bolts at 13 nm. Put back the accessory wiring junction block before filling the cooling system with fluid.
Water Pump
19209288
Q: How to replace a water pump on Buick LeSabre?
A: A new Water Pump needs you to drain engine coolant and disconnect the Drive Belt first. Detach the bolts from both the Water Pump Pulley before removing the parts. Next disconnect both Water Pump mounting bolts (1 and 2) followed by removing the Water Pump. Check both sides of where the Water Pump fits and examine the Water Pump units. Use a new gasket to fit the Water Pump on the engine and tighten the bolts (1, 2) using the short bolts at 15 nm (11 ft. Lbs.) and the long bolts at 30 nm (22 ft. Lbs.). Attach the Water Pump Pulley with its bolts before tightening them to 13 nm (115 inch lbs.). Reinstall the Drive Belt and refill the cooling system later.