How to service and repair the thermostat on Buick LeSabre?

The first step to serve and fix a Thermostat requires removing the engine cover. Start by draining the cooling system followed by using spring hose clamp pliers (J 38185) to loosen the clamp at the Thermostat Housing inlet. First move the inlet hose out of the housing before removing Thermostat Housing bolts so you can gain access to the Thermostat . Clear the contact surfaces of both the gasket and housing and intake port. Begin the installation process by placing the Thermostat in position then install the Thermostat Housing with an updated gasket. Secure the Thermostat Housing bolts with torque at 20 nm (15 ft. Lbs.) before you attach the inlet Radiator Hose and clamp. After system refill you should check for any cooling system leaks before you can install the engine cover.

How to replace the thermostat (LY7) on Buick LaCrosse?

Start the Thermostat (LY7) replacement by partially draining the cooling system without separating upper and lower intake manifolds. First disconnect both the upper and lower intake manifolds before separating the surge tank hose from the Thermostat location. The replacement of the Thermostat (LY7) starts with removing the coolant pipe/Thermostat housing bolt, then the coolant pipe bolt followed by separating the coolant inlet pipe from the Thermostat housing. Remove the coolant pipe o-ring seal and Thermostat seal when performing the Thermostat bolt removal and Thermostat removal process. Before installing the Thermostat place it with a new Thermostat seal then use a torque wrench to tighten the bolts to 10 n.m (89 lb in). Installation of the new coolant pipe seal follows after it is reattached with the fasteners 1 & 3 before reconnecting the surge tank hose to the Thermostat and lastly reinstalling upper and lower intake manifolds to complete the cooling system's refill.

How to replace the thermostat on Buick Regal?

Begin Thermostat replacement starting with fuel injector sight shield removal. First drain some coolant from your engine's cooling system. Disconnect the throttle body air inlet duct with extreme caution. Use hose clamp pliers (J38185) to readjust the hose clamp which secures the water outlet housing then remove the Radiator Hose from this housing component. First uninstall the bolts from the water outlet housing before you can remove the water outlet housing together with its gasket. Check the mating surfaces of the Thermostat while you clean them. Start by positioning the Thermostat and placing the gasket into its correct spot then install the water outlet housing. Use rtv sealer (GM P/N 1052366 or equivalent) to install water outlet housing bolts before tightening them to 27 nm (20 ft. Lbs.). For reinstallation use hose clamp pliers (J38185) to place and secure the hose clamp on the water outlet housing. Reinstall the throttle body air inlet duct and procede to fill the cooling system before installing the fuel injector sight shield. Finally, inspect for leaks.

OEM Buick Thermostat

Engine Coolant Thermostat

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43 Thermostats found

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Buick Thermostat Housing
Part Number: 12620112
$56.23 MSRP: $115.56
You Save: $59.33 (52%)
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Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Housing, Engine Coolant Thermostat
- Replaces: 12567750, 12572988, 12602913
Fits the following Buick Models:
- Rainier | 2004-2007 | CXL, CXL Plus | 6 Cyl 4.2 L GAS
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Buick Thermostat Unit
Part Number: 24506986
$17.76 MSRP: $33.36
You Save: $15.60 (47%)
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature; Thermostat
- Replaces: 03037747, 10207375, 3037747, 24500253
Fits the following Buick Models:
- Century | 1987-1991 | Custom, Estate Wagon, Limited, Special | 6 Cyl 3.3 L GAS, 6 Cyl 3.8 L GAS
- Electra | 1987-1989 | Limited, Park Avenue, Park Avenue Ultra, T-Type | 6 Cyl 3.8 L GAS
- LeSabre | 1986-1991 | Base, Custom, Limited, T-Type | 6 Cyl 3.0 L GAS, 6 Cyl 3.8 L GAS
- Park Avenue | 1997, 1991 | Base, Ultra | 6 Cyl 3.8 L GAS
- Reatta | 1988-1990 | Base | 6 Cyl 3.8 L GAS
- Regal | 1997, 1990-1991 | Custom, GS, Gran Sport, LS, Limited | 6 Cyl 3.8 L GAS
- Riviera | 1995-1998, 1986-1990 | Base, Luxury, T-Type | 6 Cyl 3.8 L GAS
- Skylark | 1986-1991 | Base, Custom, Gran Sport, Limited, Luxury Edition | 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 Thermostat
Part Number: 12555290
$37.08 MSRP: $73.58
You Save: $36.50 (50%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature
- Replaces: 10128336, 10223370
Fits the following Buick Models:
- Roadmaster | 1994-1996 | Base, Collector's Edition, Estate Wagon, Estate Wagon Collector's Edition, Limited, Limited Collector's Edition | 8 Cyl 5.7 L GAS
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Buick Intake Manifold
Part Number: 24577299
$16.76 MSRP: $29.91
You Save: $13.15 (44%)
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature; Thermostat Unit; Thermostat
- Replaces: 24576634, 10182377, 24577130
Fits the following Buick Models:
- Century | 1993-1996 | Custom, Limited, Special | 4 Cyl 2.2 L GAS
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Buick Thermostat
Part Number: 89018168
$39.67 MSRP: $78.71
You Save: $39.04 (50%)
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Product Specifications
- Other Name: Engine Coolant Thermostat; Thermostat, Engine Coolant Temperature
- Replaces: 89017851
Fits the following Buick Models:
- Rainier | 2007 | CXL | 8 Cyl 5.3 L GAS
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Buick Thermostat Unit
Part Number: 55492938
$59.81 MSRP: $108.25
You Save: $48.44 (45%)
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature; Thermostat
Fits the following Buick Models:
- Cascada | 2016-2019 | Base, Premium, Sport Touring | 4 Cyl 1.6 L GAS
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Buick Thermostat
Part Number: 55503988
$32.86 MSRP: $58.69
You Save: $25.83 (45%)
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Product Specifications
- Other Name: Thermostat Assembly-Engine Coolant; Thermostat, Engine Coolant Temperature
Fits the following Buick Models:
- Encore GX | 2020-2024 | Essence, Preferred, Select | 3 Cyl 1.2 L GAS
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Buick Thermostat
Part Number: 10207373
$11.50 MSRP: $20.54
You Save: $9.04 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature
Fits the following Buick Models:
- Roadmaster | 1991-1993 | Base, Estate Wagon, Limited | 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L GAS
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Buick Thermostat
Part Number: 24500253
$17.76 MSRP: $33.36
You Save: $15.60 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature
- Replaced by: 24506986
Fits the following Buick Models:
- Century | 1991 | Custom, Limited, Special | 6 Cyl 3.3 L GAS
- Park Avenue | 1991 | Base, Ultra | 6 Cyl 3.8 L GAS
- Regal | 1990-1991 | Custom, Gran Sport, Limited | 6 Cyl 3.8 L GAS
- Skylark | 1991 | Base, Custom, Gran Sport, Luxury Edition | 6 Cyl 3.3 L GAS
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Buick Thermostat
Part Number: 3037747
$17.76 MSRP: $33.36
You Save: $15.60 (47%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Thermostat, Engine Coolant
- Replaced by: 24506986
Fits the following Buick Models:
- Century | 1987-1990 | Custom, Estate Wagon, Limited | 6 Cyl 3.3 L GAS, 6 Cyl 3.8 L GAS
- Electra | 1987-1989 | Limited, Park Avenue, Park Avenue Ultra, T-Type | 6 Cyl 3.8 L GAS
- LeSabre | 1986-1991 | 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
- Riviera | 1986-1990 | Luxury, T-Type | 6 Cyl 3.8 L GAS
- Skylark | 1986-1990 | Custom, Gran Sport, Limited, Luxury Edition | 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 Thermostat
Part Number: 3059793
$9.76 MSRP: $17.42
You Save: $7.66 (44%)
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Product Specifications
- Other Name: Thermostat Assembly-Engine Coolant
- Replaced by: 10192505
Fits the following Buick Models:
- Skyhawk | 1984-1989 | Custom, Limited, SE, Sport, T-Type | 4 Cyl 1.8 L GAS, 4 Cyl 2.0 L GAS
- Skylark | 1984-1988 | Custom, Limited | 4 Cyl 2.5 L GAS
- Somerset | 1986-1987 | Custom, Limited, T-Type | 4 Cyl 2.5 L GAS
- Somerset Regal | 1985 | Base, Limited | 4 Cyl 2.5 L GAS
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Buick Thermostat
Part Number: 10101864
$2.04 MSRP: $18.11
You Save: $16.07 (89%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Thermostat Assembly-Engine Coolant; Thermostat, Engine Coolant Temperature
Fits the following Buick Models:
- Century | 1991-1992 | Custom, Limited, Special | 4 Cyl 2.5 L GAS
- Skylark | 1991 | Base, Custom, Gran Sport, Luxury Edition | 4 Cyl 2.5 L GAS
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Buick Thermostat
Part Number: 1623547
Product Specifications
- Other Name: Thermostat Assembly-Engine Coolant; Thermostat, Engine Coolant Temperature
Fits the following Buick Models:
- Riviera | 1984-1985 | Base, Luxury, T-Type | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L DIESEL
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Buick Thermostat
Part Number: 10045126
Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature
Fits the following Buick Models:
- Skyhawk | 1987-1988 | Custom, Limited, SE, Sport, T-Type | 4 Cyl 2.0 L GAS
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Buick Thermostat Housing, Lower
Part Number: 1620610
Product Specifications
- Other Name: Housing-Engine Coolant Thermostat Lower; Thermostat Housing Cover; Housing, Engine Coolant Thermostat
- Position: Lower
Fits the following Buick Models:
- Riviera | 1984-1985 | Base, Luxury, T-Type | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L DIESEL
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Buick Thermostat Housing
Part Number: 12597257
Product Specifications
- Other Name: Housing, Engine Coolant Temperature; Thermostat Housing Cover; Water Outlet; Housing, Engine Coolant Thermostat
- Replaces: 12574355
Fits the following Buick Models:
- LaCrosse | 2005-2008 | 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 Thermostat
Part Number: 10207381
$22.68 MSRP: $40.52
You Save: $17.84 (45%)
Product Specifications
- Other Name: Thermostat Assembly-Engine Coolant; Thermostat, Engine Coolant Temperature
- Replaces: 03054228, 3054228
Fits the following Buick Models:
- Century | 1984-1985 | Custom, Estate, Estate Wagon, Limited, Olympia Limited | 6 Cyl 4.3 L DIESEL
- Electra | 1985 | Limited, Park Avenue, T-Type | 6 Cyl 3.0 L GAS, 6 Cyl 3.8 L GAS
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Buick Thermostat
Part Number: 3041390
Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature
Fits the following Buick Models:
- Century | 1984-1985 | Custom, Estate, Estate Wagon, Limited, Olympia Limited, T-Type | 6 Cyl 3.0 L GAS
- Electra | 1984-1985 | Limited, Park Avenue, T-Type | 6 Cyl 3.0 L GAS, 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS
- LeSabre | 1984-1985 | Collector's Edition, Custom, Limited | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS
- Regal | 1984-1987 | Base, Limited | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS, 6 Cyl 4.3 L DIESEL
- Riviera | 1984-1985 | Base, Luxury, T-Type | 6 Cyl 3.8 L GAS, 6 Cyl 4.1 L GAS, 8 Cyl 5.0 L GAS, 8 Cyl 5.7 L DIESEL
View More
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Buick Thermostat
Part Number: 22545290
Product Specifications
- Other Name: Thermostat, Engine Coolant Temperature
Fits the following Buick Models:
- Skylark | 1989-1993 | Base, Custom, Gran Sport, Limited, Luxury Edition | 4 Cyl 2.3 L GAS
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Buick Thermostat
Part Number: 22538325
Product Specifications
- Other Name: Thermostat Assembly-Engine Coolant; Thermostat, Engine Coolant Temperature
Fits the following Buick Models:
- Electra | 1989 | Estate Wagon | 8 Cyl 5.0 L GAS
- LeSabre | 1988-1990 | Estate Wagon | 8 Cyl 5.0 L GAS
- Skylark | 1988 | Custom, Limited | 4 Cyl 2.3 L GAS
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1-20 of 43 Results

Buick Thermostat Parts Questions & Experts Answers

Thermostat Unit
24505924
Q: How to service and repair the thermostat on Buick LeSabre?
A: The first step to serve and fix a Thermostat requires removing the engine cover. Start by draining the cooling system followed by using spring hose clamp pliers (J 38185) to loosen the clamp at the Thermostat Housing inlet. First move the inlet hose out of the housing before removing Thermostat Housing bolts so you can gain access to the Thermostat . Clear the contact surfaces of both the gasket and housing and intake port. Begin the installation process by placing the Thermostat in position then install the Thermostat Housing with an updated gasket. Secure the Thermostat Housing bolts with torque at 20 nm (15 ft. Lbs.) before you attach the inlet Radiator Hose and clamp. After system refill you should check for any cooling system leaks before you can install the engine cover.
Thermostat Housing
12597257
Q: How to replace the thermostat (LY7) on Buick LaCrosse?
A: Start the Thermostat (LY7) replacement by partially draining the cooling system without separating upper and lower intake manifolds. First disconnect both the upper and lower intake manifolds before separating the surge tank hose from the Thermostat location. The replacement of the Thermostat (LY7) starts with removing the coolant pipe/Thermostat housing bolt, then the coolant pipe bolt followed by separating the coolant inlet pipe from the Thermostat housing. Remove the coolant pipe o-ring seal and Thermostat seal when performing the Thermostat bolt removal and Thermostat removal process. Before installing the Thermostat place it with a new Thermostat seal then use a torque wrench to tighten the bolts to 10 n.m (89 lb in). Installation of the new coolant pipe seal follows after it is reattached with the fasteners 1 & 3 before reconnecting the surge tank hose to the Thermostat and lastly reinstalling upper and lower intake manifolds to complete the cooling system's refill.
Thermostat Unit
24505924
Q: How to replace the thermostat on Buick Regal?
A: Begin Thermostat replacement starting with fuel injector sight shield removal. First drain some coolant from your engine's cooling system. Disconnect the throttle body air inlet duct with extreme caution. Use hose clamp pliers (J38185) to readjust the hose clamp which secures the water outlet housing then remove the Radiator Hose from this housing component. First uninstall the bolts from the water outlet housing before you can remove the water outlet housing together with its gasket. Check the mating surfaces of the Thermostat while you clean them. Start by positioning the Thermostat and placing the gasket into its correct spot then install the water outlet housing. Use rtv sealer (GM P/N 1052366 or equivalent) to install water outlet housing bolts before tightening them to 27 nm (20 ft. Lbs.). For reinstallation use hose clamp pliers (J38185) to place and secure the hose clamp on the water outlet housing. Reinstall the throttle body air inlet duct and procede to fill the cooling system before installing the fuel injector sight shield. Finally, inspect for leaks.