Calorstat TH1378.92 Engine Coolant Thermostat

Engine Coolant Thermostat for OE-Style Temperature Control

Calorstat TH1378.92 is a standard engine coolant thermostat built for consistent coolant flow control at a 197°F opening temperature. It is a direct-fit cooling system service part for a wide range of Ford, Dodge, Chevrolet, GMC, Cadillac, Buick, Chrysler, and Aston Martin applications.

Use this thermostat when servicing overheating concerns, slow warm-up complaints, or temperature regulation issues on vehicles such as the Ford F-150, Dodge Ram 1500, and Chevrolet C1500. The TH1378.92 part number is also a useful reference when cross-checking cooling system replacements.

Key Features

• Standard engine coolant thermostat design
• Start to open temperature: 197°F / 92°C
• Sealing flange outside diameter: 2.12 in.
• Height between flanges: 0.88 in.
• Jiggle pin weep hole: Yes
• Calorstat TH1378.92 for cooling system service and replacement

Detailed Description

This Calorstat engine coolant thermostat regulates coolant circulation based on engine temperature, helping the cooling system reach and maintain the correct operating range. The 197°F opening point is specified for many older domestic truck, van, SUV, and passenger car applications, including Ford E-150 Econoline, Ford F-250, Dodge Ram 2500, and GMC Yukon fitments. The jiggle pin weep hole helps with air bleeding during coolant service, while the listed flange dimensions support proper housing fitment.

This part cross-references Gates 33009 and OSC 13359 for the same application. The TH1378.92 reference is also useful when matching thermostat specs across cooling system catalogs.

What It Helps Address

• Engine running hotter than normal
• Delayed engine warm-up after cold starts
• Temperature fluctuation from a sticking thermostat
• Cooling system service on high-mileage vehicles
• Replacement of a worn thermostat during radiator or water pump work

Installation Notes and Tips

Install the thermostat with the correct orientation for the housing and coolant flow path. Clean the sealing surfaces before assembly and verify the housing gasket surface is free of corrosion or old sealant. After installation, refill and bleed the cooling system according to the vehicle service procedure to remove trapped air. Confirm the thermostat rating matches the original application before installation.

Quality Assurance

Calorstat cooling components are cataloged by application and specification to support accurate replacement selection. Verify fitment against the vehicle year, make, model, and cooling system requirements before ordering.

Compatible With Select Applications

• Fits 2001-2002 Ford Windstar, N/A
• Fits 2001 Ford Explorer, N/A
• Fits 1998-1999 Dodge Durango, N/A
• Fits 1997-1999 Dodge Ram 1500, N/A
• Fits 1995-1999 Dodge Ram 1500 Van, N/A
• Fits 1997-1999 Dodge Ram 2500, N/A
• Fits 1996-1999 Dodge Ram 2500 Van, N/A
• Fits 1997-1999 Dodge Ram 3500, N/A
• Fits 1996-1999 Dodge Ram 3500 Van, N/A
• Fits 1988-1996 Ford F-150, N/A
• Fits 1992-1995 Chevrolet C1500, N/A
• Fits 1992-1995 Chevrolet K1500, N/A
• Fits 1991-1995 GMC Yukon, N/A
• Fits 1987-1993 Cadillac Eldorado, N/A
• Fits 1980-1985 Buick LeSabre, N/A