Motorad 203-180 Engine Coolant Thermostat

Engine Coolant Thermostat for OE-Style Cooling Control

The Motorad Standard 203-180 engine coolant thermostat is a 180°F replacement thermostat built to OE specifications for steady coolant regulation. It uses a copper case and wax compound for quick reaction to coolant temperature changes, helping maintain consistent engine operating temperature in a wide range of GM, Isuzu, Pontiac, Suzuki, and Geo applications.

Fits 1990-2003 Chevrolet S10, N/A; Fits 1991-2003 GMC Sonoma, N/A; Fits 1998-2001 Chevrolet Metro, N/A; Fits 1991-2001 Suzuki Swift, N/A; Fits 1996-2000 Isuzu Hombre, N/A; Fits 1995-2000 Pontiac Firefly, N/A; Fits 1995-2000 Suzuki Esteem, N/A; Fits 1989-1997 Chevrolet Camaro, N/A; Fits 1996-1997 Chevrolet Lumina, N/A; Fits 1996-1997 Chevrolet Monte Carlo, N/A; Fits 1991-1997 Chevrolet P30, N/A; Fits 1992-1997 Geo Metro, N/A; Fits 1991-1997 GMC P3500, N/A; Fits 1989-1997 Pontiac Firebird, N/A; Fits 1986-1996 Buick Century, N/A; Fits 1992-1996 Chevrolet Corsica, N/A; Fits 1991-1996 Chevrolet G30, N/A; Fits 1991-1996 GMC G3500, N/A; Fits 1986-1996 Oldsmobile Cutlass Ciera, N/A; Fits 1996 Oldsmobile Cutlass Supreme, N/A; Fits 1996 Pontiac Grand Prix, N/A; Fits 1986-1995 Buick LeSabre, N/A; Fits 1990-1995 Buick Regal, N/A; Fits 1995 Buick Riviera, N/A; Fits 1986-1993 Buick Riviera, N/A; Fits 1992-1995 Chevrolet Astro, N/A; Fits 1995 Chevrolet Blazer, N/A; Fits 1991-1995 Chevrolet C2500, N/A; Fits 1992-1995 Chevrolet C2500 Suburban, N/A; Fits 1991-1995 Chevrolet C3500, N/A; Fits 1992-1995 Chevrolet Cavalier, N/A; Fits 1991-1995 Chevrolet K2500, N/A; Fits 1992-1995 Chevrolet K2500 Suburban, N/A; Fits 1991-1995 Chevrolet K3500, N/A; Fits 1992-1995 Chevrolet Lumina APV, N/A; Fits 1991-1995 GMC C2500, N/A; Fits 1992-1995 GMC C2500 Suburban, N/A; Fits 1991-1995 GMC C3500, N/A; Fits 1992-1995 GMC Jimmy, N/A; Fits 1991-1995 GMC K2500, N/A; Fits 1992-1995 GMC K2500 Suburban, N/A; Fits 1991-1995 GMC K3500, N/A; Fits 1992-1995 GMC Safari, N/A; Fits 1992-1995 Oldsmobile Silhouette, N/A; Fits 1995 Pontiac Sunfire, N/A; Fits 1992-1995 Pontiac Trans Sport, N/A; Fits 1991-1994 Buick Park Avenue, N/A; Fits 1992-1994 Chevrolet S10 Blazer, N/A; Fits 1991-1994 Isuzu Pickup, N/A; Fits 1992-1994 Oldsmobile 88, N/A; Fits 1986-1994 Oldsmobile 98, N/A; Fits 1992-1994 Oldsmobile Bravada, N/A; Fits 1987-1994 Pontiac Bonneville, N/A; Fits 1986-1993 Buick Skylark, N/A; Fits 1991-1993 Chevrolet C1500, N/A; Fits 1992-1993 Oldsmobile Achieva, N/A; Fits 1987-1993 Oldsmobile Cutlass Cruiser, N/A; Fits 1992-1993 Pontiac Grand Am, N/A; Fits 1989-1992 Chevrolet Sprint, N/A; Fits 1991-1992 Isuzu Rodeo, N/A; Fits 1986-1992 Oldsmobile Toronado, N/A; Fits 1988-1991 Buick Reatta, N/A; Fits 1991 Chevrolet R2500 Suburban, N/A; Fits 1991 Chevrolet R3500, N/A; Fits 1991 Chevrolet V3500, N/A; Fits 1991 GMC R2500 Suburban, N/A; Fits 1991 GMC R3500, N/A; Fits 1991 GMC V3500, N/A; Fits 1990-1991 Isuzu Trooper, N/A; Fits 1988-1991 Oldsmobile Cutlass Calais, N/A; Fits 1986-1991 Oldsmobile Delta 88, N/A; Fits 1990 GMC S15, N/A; Fits 1988 GMC S15, N/A; Fits 1989 Pontiac Firebird, N/A; Fits 1986-1987 Buick Regal, N/A; Fits 1985-1987 Oldsmobile Calais, N/A.

Key Features

• 180°F start-to-open temperature for OE-style engine temperature control
• Copper case and wax compound for fast response to coolant temperature changes
• Manufactured to OEM specifications and processes
• Offset design and air relief valve included where applicable
• OEM-style seals used where applicable for proper housing fit
• Standard thermostat design for broad service coverage

Detailed Product Overview

Motorad Standard 203-180 is an engine coolant thermostat built as an OE supplier part with OEM-quality materials and safety standards. The 180°F calibration is commonly used in GM, Geo, Isuzu, Pontiac, and Suzuki cooling systems where stable operating temperature is required. This thermostat cross-references Four Seasons 20380 and Bosch 3848 for the same application.

Physical dimensions include a 1.73 in sealing flange outside diameter, 1.04 in height between flanges, 1.48 in overall height, and 0.04 in flange thickness. The unit does not include a gasket or seal, does not include an installation tool, and does not use a jiggle pin weep hole.

What This Thermostat Helps Address

• Engine running too cool or too warm
• Slow warm-up after cold starts
• Temperature fluctuation in the cooling system
• Cooling system service on high-mileage GM, Isuzu, Pontiac, Suzuki, and Geo vehicles
• Replacement of a worn or sticking 180°F thermostat

Installation Notes and Tips

Verify the thermostat temperature rating and housing style before installation. Clean the thermostat housing sealing surfaces thoroughly and inspect the coolant system for contamination, corrosion, or restricted flow before reassembly. Because a gasket or seal is not included, use the correct seal or gasket specified for the application. Confirm fitment for vehicles such as Chevrolet S10, GMC Sonoma, and Pontiac Firebird by year and engine configuration before ordering.

Quality Assurance

Motorad manufactures this thermostat using OEM-quality materials and OE-supplier processes to meet original equipment specifications. The copper case and wax element are selected for responsive temperature control in demanding automotive cooling systems.