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Calorstat TH5977.92 Engine Coolant Thermostat
| Brand | Calorstat TH5977.92 |
|---|---|
| Sealing Flange Outside Diameter | 2.04 |
| Height Between Flanges | 0.88 |
| Type | Standard |
| Gasket Or Seal Included | No |
| Start to Open Temperature | 197.0 |
| 9844 | 1 |
| 9852 | 1 |
| 9943 | Yes |
| Fits | Ford and Mazda · 35 vehicles |
Standard thermostat. Provides dependable coolant temperature control for the cooling system.
197°F opening temperature. Opens at 197°F for precise engine temperature regulation.
Direct-fit replacement for the thermostat housing application.
Cross-references Motorad 333-198, Motorad 5333-198 and Motorad 7333-198 for the same application. See all 8.
Engine Coolant Thermostat for Ford and Mazda
Calorstat TH5977.92 is a standard engine coolant thermostat built for temperature control in select Ford and Mazda cooling systems. It opens at 197°F (92°C) to help regulate coolant flow and maintain stable operating temperature in applications such as Ford Explorer, Ford Ranger, Mazda B4000, Ford Aerostar, and Mazda Navajo.
Key Features
- Standard engine coolant thermostat for cooling system service
- Start to open temperature: 197°F / 92°C
- Sealing flange outside diameter: 2.04 in.
- Height between flanges: 0.88 in.
- Gasket or seal not included
- Direct-fit application coverage for select Ford Ranger and Ford Explorer models
Product Details
Calorstat TH5977.92 is specified for vehicles that use a 92°C thermostat opening point, making it a practical replacement when restoring proper coolant regulation. This thermostat is listed for 1990-2000 Ford Ranger, 1991-2000 Ford Explorer, 1994-2000 Mazda B4000, 1995-1997 Ford Aerostar, and 1991-1994 Mazda Navajo. The part number TH5977.92 is also referenced in interchange listings for related OE and aftermarket applications.
This part cross-references Motorad (e.g., 333-198, 5333-198) for the same application.
What It Helps Address
- Engine running too cool or taking too long to reach operating temperature
- Temperature fluctuation caused by a worn thermostat
- Restricted coolant flow control in the thermostat housing circuit
- Cooling system service on Ford Explorer and Ford Ranger platforms
- Replacement needs for Mazda B4000 and Mazda Navajo cooling systems
Installation Notes and Tips
Verify housing condition and clean the sealing surfaces before installation. Because no gasket or seal is included, use the correct separate seal for the application. Confirm the thermostat orientation and opening temperature match the vehicle’s cooling system requirements before reassembly. The TH5977.92 is a standard thermostat, so proper fitment depends on matching the listed engine cooling application and dimensions.
Quality Assurance
Calorstat cooling components are cataloged for OE-style service applications and are identified here with confirmed fitment data and dimensional specifications. Use the listed vehicle coverage and temperature rating to verify application before installation.
| Year | Make | Model | Liters | Cylinders | Notes |
|---|---|---|---|---|---|
| 2000 | Ford | Explorer | 5.0L | V8 | Opening Temp: 92 C / 197 F |
| 2000 | Ford | Ranger | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 2000 | Mazda | B4000 | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1999 | Ford | Explorer | 5.0L | V8 | Opening Temp: 92 C / 197 F |
| 1999 | Ford | Ranger | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1999 | Mazda | B4000 | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1998 | Ford | Explorer | 5.0L | V8 | Opening Temp: 92 C / 197 F |
| 1998 | Ford | Ranger | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1998 | Mazda | B4000 | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1997 | Ford | Aerostar | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1997 | Ford | Explorer | 5.0L | V8 | Opening Temp: 92 C / 197 F |
| 1997 | Ford | Ranger | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1997 | Mazda | B4000 | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1996 | Ford | Aerostar | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1996 | Ford | Explorer | 5.0L | V8 | Opening Temp: 92 C / 197 F |
| 1996 | Ford | Ranger | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1996 | Mazda | B4000 | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1995 | Ford | Aerostar | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1995 | Ford | Explorer | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1995 | Ford | Ranger | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1995 | Mazda | B4000 | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1994 | Ford | Explorer | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1994 | Ford | Ranger | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1994 | Mazda | B4000 | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1994 | Mazda | Navajo | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1993 | Ford | Explorer | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1993 | Ford | Ranger | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1993 | Mazda | Navajo | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1992 | Ford | Explorer | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1992 | Ford | Ranger | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1992 | Mazda | Navajo | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1991 | Ford | Explorer | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1991 | Ford | Ranger | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1991 | Mazda | Navajo | 4.0L | V6 | Opening Temp: 92 C / 197 F |
| 1990 | Ford | Ranger | 4.0L | V6 | Opening Temp: 92 C / 197 F |
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