How to replace the thermostat in a cylinder head for Buick Century and Regal?

Remove any gasket or sealer with the thermostat from the cylinder head. Unbolt the water neck by draining the coolant system below the thermostat level when trying to replace it. The next step is to remove the water neck and thereby expose the thermostat. Thereafter, clean off all traces of remnants from both manifold and residual gasket material or sealer on water necks that mate. Installing it with its wax pellet downwards is a good idea. Besides, apply some sealant on both sides of the gasket then put it on block. Finally, hold it down using retainer bolts.

Genuine Buick Regal Thermostat

Engine Coolant Thermostat

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11 Thermostats found

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Buick Regal Thermostat Assembly, Engine Coolant (W/ Gasket)
Part Number: 24505924
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat, Thermostat Unit
$17.65 MSRP: $35.82
You Save: $18.17 (51%)

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Fits the following Vehicles:
1998-2004 Buick Regal | CUSTOM, GL, GLX, GS, LIMITED, LS | 6 Cyl 3.8L
1990-1991 Buick Regal | 2 DOOR, 4 DOOR, CUSTOM 2 DOOR, CUSTOM 4 DOOR, LIMITED, LIMITED 2 DOOR, LIMITED 4 DOOR | 6 Cyl 3.8L
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Buick Regal Thermostat,Engine Coolant
Part Number: 24507563
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Replaces: 10182343, 3091114, 10226109, 03091114
$18.21 MSRP: $36.96
You Save: $18.75 (51%)

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Fits the following Vehicles:
1988-2004 Buick Regal | 2 DOOR, 4 DOOR, CUSTOM, CUSTOM 2 DOOR, CUSTOM 4 DOOR, GL, GLX, GRAN SPORT 2 DOOR, GRAN SPORT 4 DOOR, GS, LIMITED, LIMITED 2 DOOR, LIMITED 4 DOOR, LS, REGAL | 6 Cyl 2.8L, 6 Cyl 3.1L
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Buick Regal Thermostat Assembly, Engine Coolant
Part Number: 12622410
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Replaces: 21018811, 90537453, 55350941, 12615097
$75.03 MSRP: $152.26
You Save: $77.23 (51%)

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Fits the following Vehicles:
2011-2017 Buick Regal | CX 4 DOOR SEDAN, CXL 4 DOOR SEDAN, CXL TURBO 4 DOOR SEDAN, CXS 4 DOOR SEDAN | 4 Cyl 2.0L, 4 Cyl 2.4L
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Buick Regal Housing Assembly, Engine Coolant Thermostat
Part Number: 12597172
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing, Water Manifold
$89.11 MSRP: $187.21
You Save: $98.10 (53%)

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Fits the following Vehicles:
2011-2017 Buick Regal | CX 4 DOOR SEDAN, CXL 4 DOOR SEDAN | 4 Cyl 2.4L
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Buick Regal Thermostat,Engine Coolant
Part Number: 12514334
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
$12.58 MSRP: $22.56
You Save: $9.98 (45%)

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Fits the following Vehicles:
1982-1987 Buick Regal | 2 DOOR, 4 DOOR, REGAL, STATION WAGON | 6 Cyl 3.8L, 6 Cyl 4.1L
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Buick Regal Housing Assembly, Eng Cool Therm
Part Number: 25201447
- Replaces: 12651603
$61.64 MSRP: $129.48
You Save: $67.84 (53%)

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Fits the following Vehicles:
2014-2020 Buick Regal | 1SC 4 DOOR HATCHBACK, 1SL 4 DOOR HATCHBACK, 1SL 4 DOOR STATION WAGON, BASE 4 DOOR HATCHBACK, BASE 4 DOOR STATION WAGON, CX 4 DOOR SEDAN, CXL 4 DOOR SEDAN, CXS 4 DOOR SEDAN | 4 Cyl 2.0L
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Buick Regal Thermostat,Engine Coolant
Part Number: 10207373
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
$10.70 MSRP: $19.20
You Save: $8.50 (45%)

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Fits the following Vehicles:
1982-1987 Buick Regal | 2 DOOR, 4 DOOR, REGAL, STATION WAGON | 6 Cyl 4.3L Diesel, 8 Cyl 5.0L, 8 Cyl 5.7L Diesel
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Buick Regal Thermostat Assembly, Engine Coolant
Part Number: 22538325
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
$7.43 MSRP: $12.24
You Save: $4.81 (40%)

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Fits the following Vehicles:
1982-1987 Buick Regal | 2 DOOR, 4 DOOR, REGAL, STATION WAGON | 8 Cyl 5.0L
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Buick Regal Housing Assembly, Engine Coolant Thermostat
Part Number: 12605853
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing
$90.64 MSRP: $190.42
You Save: $99.78 (53%)

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Fits the following Vehicles:
2011-2013 Buick Regal | CXL TURBO 4 DOOR SEDAN, CXS 4 DOOR SEDAN | 4 Cyl 2.0L
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Buick Regal Thermostat Assembly, Engine Coolant
Part Number: 10207381
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Replaces: 3054228, 03054228
$22.58 MSRP: $40.52
You Save: $17.94 (45%)
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Fits the following Vehicles:
1984-1985 Buick Regal | 2 DOOR, 4 DOOR, REGAL | 6 Cyl 3.8L
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Buick Regal Thermostat Asm,Engine Coolant
Part Number: 12353872
- Other Name: THERMOSTAT, Engine Coolant Temperature
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Fits the following Vehicles:
1986-1987 Buick Regal | REGAL | 6 Cyl 3.8L
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Buick Regal Thermostat Parts Questions & Answers

Thermostat,Engine Coolant
10207373
Q: How to replace the thermostat in a cylinder head for Buick Century and Regal?
A: Remove any gasket or sealer with the thermostat from the Cylinder Head. Unbolt the water neck by draining the coolant system below the thermostat level when trying to replace it. The next step is to remove the water neck and thereby expose the thermostat. Thereafter, clean off all traces of remnants from both manifold and residual gasket material or sealer on water necks that mate. Installing it with its wax pellet downwards is a good idea. Besides, apply some sealant on both sides of the gasket then put it on block. Finally, hold it down using retainer bolts.