Motorad 630-194 Engine Coolant Thermostat

Engine Coolant Thermostat for Mercedes-Benz

The Motorad Standard 630-194 engine coolant thermostat is built for precise temperature control in demanding cooling systems. It opens at 194°F and includes an O-ring seal and gasket/seal for a direct replacement on select Mercedes-Benz applications.

Compatible with 2003 Mercedes-Benz C200 and 2003-2005 Mercedes-Benz C230, this thermostat supports OE-style cooling performance for vehicles that require a 194-degree thermostat. The Motorad Standard line focuses on OE-spec construction and fitment for routine cooling system service.

Key Features

• Start-to-open temperature: 194°F
• Standard thermostat design for OE-style replacement
• Copper case and wax compound for responsive temperature changes
• Offset design with air relief valve
• O-ring seal type with rubber gasket/seal material
• Gasket/seal included
• Jiggle pin weep hole included
• OEM-style seals included where applicable

Detailed Description

Motorad 630-194 is an engine coolant thermostat manufactured to OE specifications and processes using OEM-quality materials and safety standards. The copper case and wax compound are engineered for quick reaction to coolant temperature changes, helping the cooling system regulate engine operating temperature consistently. This thermostat is a direct-fit service part for Mercedes-Benz C200 and Mercedes-Benz C230 applications listed above.

This part cross-references Gates 34056 and Dorman - HELP 56309 for the same application. The Motorad 630-194 part number is also referenced by several interchange numbers, including 194-036 and 63094.

What It Helps Address

• Engine running too cool or too warm due to thermostat wear
• Delayed coolant flow control during warm-up
• Temperature fluctuation in the cooling system
• Coolant seepage at the thermostat seal area
• Service replacement for OE-specified 194°F thermostat applications

Installation Notes and Tips

Verify the 194°F temperature specification before installation. Inspect the thermostat housing, sealing surfaces, and coolant condition during service, and replace worn seals or damaged mating surfaces as needed. Confirm the offset design and seal orientation match the original part before final assembly.

Quality Assurance

Motorad Standard parts are manufactured with OE supplier processes and OEM-quality materials to meet the demands of automotive cooling systems. The 630-194 is built to OE specifications for consistent fit and temperature control in the listed Mercedes-Benz applications.