How to remove and replace a thermostat in a Chevrolet Astro's cooling system?

If your engine is slow to heat up or overheats, it may be due to a thermostat issue. Before assuming the thermostat is at fault, check the coolant level, drivebelt tension, and temperature gauge. If the upper radiator hose is cold and the engine overheats, the thermostat is likely stuck closed and needs replacement. To exchange it, begin by unplugging the battery. Drain the coolant. Remove the air cleaner assembly and detach the upper radiator hose. Next, remove the thermostat housing cover and gasket, then remove the old thermostat. Use a scraper and thinner to clean the gasket surfaces, and apply sealant to the surfaces. Install the new thermostat and gasket. Reattach the cover and hose and check all hoses and clamps. Refill the system, run the engine, and look for leaks.

Genuine Chevrolet Astro Thermostat

Engine Coolant Thermostat

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8 Thermostats found

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Chevrolet Astro Thermostat,Engine Coolant
Part Number: 12632948
$27.93 MSRP: $52.70
You Save: $24.77 (47%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Replaces: 12551472, 12257859, 12563335, 12597583, 12557859
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2005 Chevrolet Astro | VAN ASTRO | 6 Cyl 4.3L
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Chevrolet Astro Thermostat,Engine Coolant
Part Number: 10190925
$13.67 MSRP: $25.80
You Save: $12.13 (48%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Replaces: 10190927, 10147886
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993-1994 Chevrolet Astro | VAN ASTRO | 6 Cyl 4.3L
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Chevrolet Astro Thermostat,Engine Coolant(W/Gasket)
Part Number: 24506986
$16.81 MSRP: $31.72
You Save: $14.91 (48%)
Ships in 1 Business Day
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Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat, Thermostat Unit
- Replaces: 3037747, 24500253, 03037747, 10207375
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1992-1995 Chevrolet Astro | VAN ASTRO | 6 Cyl 4.3L
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Chevrolet Astro Thermostat,Engine Coolant
Part Number: 12514334
$12.91 MSRP: $23.16
You Save: $10.25 (45%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1987-1990 Chevrolet Astro | VAN ASTRO | 4 Cyl 2.5L
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Chevrolet Astro Housing Pkg,Engine Coolant Thermostat
Part Number: 12511714
$36.87 MSRP: $77.46
You Save: $40.59 (53%)
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Product Specifications
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1987-1990 Chevrolet Astro | VAN ASTRO | 4 Cyl 2.5L
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Chevrolet Astro Thermostat,Engine Coolant
Part Number: 10207373
$10.85 MSRP: $19.72
You Save: $8.87 (45%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1992 Chevrolet Astro | VAN ASTRO | 6 Cyl 4.3L
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Chevrolet Astro Thermostat Asm,Engine Coolant
Part Number: 3050922
Product Specifications
- Other Name: THERMOSTAT, Engine Coolant Temperature; Thermostat
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1986 Chevrolet Astro | VAN ASTRO | 4 Cyl 2.5L
View related parts
Chevrolet Astro Housing,Engine Coolant Thermostat
Part Number: 10019090
Product Specifications
- Other Name: HOUSING, Engine Coolant Thermostat; Thermostat Housing
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1985-1986 Chevrolet Astro | VAN ASTRO | 4 Cyl 2.5L

Chevrolet Astro Thermostat Parts Questions & Experts Answers

Thermostat,Engine Coolant
12632948
Q: How to remove and replace a thermostat in a Chevrolet Astro's cooling system?
A: If your engine is slow to heat up or overheats, it may be due to a thermostat issue. Before assuming the thermostat is at fault, check the coolant level, drivebelt tension, and temperature gauge. If the upper radiator hose is cold and the engine overheats, the thermostat is likely stuck closed and needs replacement. To exchange it, begin by unplugging the battery. Drain the coolant. Remove the air cleaner assembly and detach the upper radiator hose. Next, remove the thermostat housing cover and gasket, then remove the old thermostat. Use a scraper and thinner to clean the gasket surfaces, and apply sealant to the surfaces. Install the new thermostat and gasket. Reattach the cover and hose and check all hoses and clamps. Refill the system, run the engine, and look for leaks.