Stant 45028 Engine Coolant Thermostat

180 Degree Superstat Thermostat for OE Cooling Control

Stant Superstat Thermostat 45028 is a premium engine coolant thermostat built for stable temperature control in high-load and high-temperature operation. It uses a high venturi design for stronger cooling capacity, along with a larger piston and a thicker stainless steel flange for added durability and corrosion resistance.

Compatible With Chevrolet Cavalier, Pontiac Sunfire, Oldsmobile Alero, Pontiac Grand Am, Chevrolet Malibu, Buick Skylark, Oldsmobile Achieva, Chevrolet Corsica, and Oldsmobile Cutlass Ciera applications that call for a 180 degree thermostat.

Key Features

• 180 degree engine coolant thermostat for OE-temperature applications
• High venturi design supports maximum cooling capacity under heavy thermal load
• 25% larger piston diameter delivers greater opening force than standard thermostats
• Burnished stainless steel flange adds stress relief and corrosion resistance
• Thicker flange construction for added strength
• Stant Superstat Thermostat line focused on controlled coolant flow and temperature regulation

Detailed Description

Part number 45028 is part of Stant’s Superstat Thermostat line, engineered for drivers who need consistent coolant regulation in everyday driving and demanding operating conditions. The 180 degree opening temperature supports OE-style engine temperature control, while the larger piston and venturi-style design help maintain cooling performance when the engine is under load. This makes Stant 45028 a practical choice for Chevrolet Cavalier, Pontiac Sunfire, Pontiac Grand Am, and related GM compact and midsize platforms that specify this thermostat temperature.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Vehicle Fitment

• Fits 1995-2002 Chevrolet Cavalier, N/A; Temperature 180 Degrees; OE Temperature; Superstat ® Thermostat
• Fits 1995-2002 Pontiac Sunfire, N/A; Temperature 180 Degrees; OE Temperature; Superstat ® Thermostat
• Fits 1999-2001 Oldsmobile Alero, N/A; Temperature 180 Degrees; OE Temperature; Superstat ® Thermostat
• Fits 1994-2001 Pontiac Grand Am, N/A; Temperature 180 Degrees; OE Temperature; Superstat ® Thermostat
• Fits 1997-1999 Chevrolet Malibu, N/A; Temperature 180 Degrees; OE Temperature; Superstat ® Thermostat
• Fits 1994-1998 Buick Skylark, N/A; Temperature 180 Degrees; OE Temperature; Superstat ® Thermostat
• Fits 1994-1998 Oldsmobile Achieva, N/A; Temperature 180 Degrees; OE Temperature; Superstat ® Thermostat
• Fits 1996 Chevrolet Corsica, N/A; Temperature 180 Degrees; Alternate Temperature; Superstat ® Thermostat
• Fits 1993-1995 Oldsmobile Cutlass Ciera, N/A; Temperature 180 Degrees; OE Temperature; Superstat ® Thermostat

Common Uses

• Engine running hotter than normal due to thermostat wear
• Slow warm-up or inconsistent coolant temperature control
• Cooling system service on GM vehicles with a 180 degree thermostat specification
• Restoring proper coolant flow after thermostat sticking or delayed opening
• Maintaining OE-style operating temperature in daily-driven vehicles

Installation Notes

Verify the thermostat temperature rating and flange dimensions before installation. The listed dimensions are flange diameter 1.725 in, height from flange to bottom 1.48 in, and height from flange to top of bridge 0.72 in. Clean the housing sealing surfaces and inspect the cooling system for contamination, coolant condition, and housing wear before installing Stant 45028.

Quality Assurance

Stant Superstat thermostats are built with a stainless steel flange and reinforced construction details to support corrosion resistance and consistent operation in demanding cooling systems.