Motorad 463-183 Engine Coolant Thermostat

Engine Coolant Thermostat for Jaguar and Lincoln

The Motorad Standard 463-183 engine coolant thermostat is an OE-specification replacement built for precise coolant temperature control. It opens at 183°F and includes a rubber O-ring seal and jiggle pin weep hole for proper air bleeding during service.

Built with OEM-quality materials and processes, this thermostat uses a copper case and wax compound for quick response to coolant temperature changes. The offset design and OEM-style sealing details support accurate fitment in applications such as Jaguar XJ8, XJR, XK8, XKR, S-Type, Vanden Plas, Super V8, plus Lincoln LS and Ford Thunderbird applications that call for a 183-degree thermostat.

Key Features

• Motorad Standard 463-183 engine coolant thermostat
• 183°F opening temperature for OE-specified cooling control
• Copper case and wax compound for responsive temperature regulation
• Includes gasket/seal with rubber O-ring seal type
• Jiggle pin weep hole helps release trapped air during installation
• Offset design with OEM-style seals where applicable
• Sealing flange outside diameter: 2.64 in.
• Bypass diameter: 1.38 in.
• Height: 4.75 in.; height between flanges: 3.33 in.

Detailed Description

Motorad’s Standard line focuses on direct-fit cooling system service parts built to OE specifications. Part number 463-183 is an engine coolant thermostat for vehicles that require a standard 183-degree thermostat, including 1997-2002 Jaguar XK8, 1998-2003 Jaguar XJ8, 1998-2003 Jaguar XJR, 1998-2003 Jaguar Vanden Plas, 2000-2008 Jaguar S-Type, 2000-2009 Jaguar XKR, 2002 Ford Thunderbird, and 2000-2002 Lincoln LS. This part cross-references Stant 14748 and Four Seasons 56383 for the same application.

The thermostat’s copper case and wax element are engineered to react quickly as coolant temperature changes, helping the engine reach and maintain the specified operating range. The included seal and air-relief feature support a cleaner service installation and proper coolant flow management in demanding automotive cooling systems.

Common Cooling System Issues It May Address

• Engine running too cool or too warm due to thermostat wear
• Delayed warm-up after cold starts
• Temperature fluctuation during stop-and-go driving
• Coolant flow control problems caused by a sticking thermostat
• Air trapped in the cooling system after thermostat service

Installation Notes and Tips

Verify the OE-specified 183°F temperature before installation and confirm the thermostat housing and sealing surfaces are clean and flat. Replace the seal during service, orient the jiggle pin or air-relief feature as required by the application, and refill the cooling system with the correct coolant mixture. After installation, bleed air from the system and check for leaks at operating temperature.

Quality Assurance

Motorad manufactures this thermostat with OEM-quality materials and safety standards as an OE supplier, using OEM specifications and processes for consistent cooling-system service.