ACDelco 131-100 | Engine Coolant Thermostat

Part Number
Engine Coolant Thermostat

Fits: 92-96 Chevrolet Corvette, 93-96 Cadillac Commercial Chassis, 93-96 Cadillac Fleetwood, 93-97 Chevrolet Camaro, 93-97 Pontiac Firebird, 94-96 Buick Commercial Chassis, 94-96 Buick Roadmaster, 94-96 Chevrolet Caprice, 95-96 Chevrolet Impala

Special Price $37.39 Regular Price $43.99
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ACDelco GM Original Equipment Engine Coolant Thermostats control the flow of coolant through your vehicle's radiator to help the engine reach and maintain its optimal operating temperature, and are GM-recommended replacements for your vehicle's original components. These original equipment engine coolant thermostats have been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors. ? WARNING: Cancer and Reproductive Harm -



  • Buick;Cadillac;Chevrolet;Pontiac
  • Controls the flow of coolant through your vehicle's radiator to help the engine reach and maintain its optimal operating temperature
  • GM-recommended replacement part for your GM vehicle's original factory component
  • Manufactured to GM OE specification for fit, form, and function
  • Offering the quality, reliability, and durability of GM OE


Gasket Center Bore Diameter (in)2.13
Gasket Center Bore Diameter (mm)53.98
Gasket ColorBlack
Gasket MaterialRubber
Good Maintenance Practices - Section 1 - Bullet 1Have cooling system inspected immediately if instrument panel-mounted temperature gauge indicates engine overheating
Good Maintenance Practices - Section 1 - Bullet 2Use the recommended coolant type for your vehicle
Jiggle Pin Weep HoleNo
Length (in)3.09
Mount Hole Quantity0
Opening Temperature (Deg. C)82.2
Opening Temperature (Deg. F)180
Thermostat Diameter (in)2.31
Thermostat Diameter (mm)58.67
Thermostat Height (in)2.22
Thermostat Height (mm)56.39
Weight (lb)0.4
Width (in)3.06

180 DEG



  • 1992-1996 Chevrolet Corvette
  • 1993-1997 Chevrolet Camaro
  • 1993-1996 Cadillac Commercial Chassis
  • 1993-1997 Pontiac Firebird
  • 1994-1996 Buick Roadmaster
  • 1993-1996 Cadillac Fleetwood
  • 1994-1996 Chevrolet Caprice
  • 1995-1996 Chevrolet Impala
  • 1994-1996 Buick Commercial Chassis
Customer Questions
Does AC Delco make Ford parts?
No, AC Delco produces parts primarily for General Motors vehicles and does not make parts specifically for Ford vehicles.
Can I use AC Delco parts to replace OEM parts?
Yes, in most cases AC Delco parts can be used as a replacement for OEM parts. However, it's important to ensure that the parts are compatible with your specific make and model of vehicle.
What AC Delco oil filter do I need?
AC Delco offers a variety of oil filters that are compatible with different makes and models of vehicles. To determine which AC Delco oil filter you need, consult your vehicle's owner's manual or use our online filter lookup tool that matches the make, model, and year of your vehicle.
When to replace the engine coolant thermostat?
The engine coolant thermostat should be replaced if it is not functioning properly or as a preventive maintenance measure after a certain mileage or time interval.
What is an engine coolant thermostat?
An engine coolant thermostat is a component that regulates the flow of coolant through the engine to maintain optimal operating temperature.
Will the engine coolant temperature sensor keep the car from starting?
In most cases, a malfunctioning engine coolant temperature sensor (ECT sensor) will not prevent the car from starting. The engine coolant temperature sensor (ECT sensor) is responsible for monitoring the temperature of the engine coolant and sending that information to the engine control unit (ECU). The ECU uses this information to make adjustments to the fuel mixture and ignition timing for optimal engine performance.
Does PartsHawk carry an engine coolant thermostat for Mazda 6?
Yes, PartsHawk carries an Engine Coolant thermostat for Mazda 6
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