Motorad 234-174 Engine Coolant Thermostat

Engine Coolant Thermostat for OE-Style Cooling Control

The Motorad Standard 234-174 engine coolant thermostat is built for precise temperature control in demanding cooling systems. With a 174°F opening temperature, copper case construction, and wax compound response, it supports stable coolant flow for Volkswagen, Volvo, Audi, Ford, Porsche, and Mercury applications.

Motorad’s Standard line focuses on OE-style replacement parts made to OEM specifications and processes. This thermostat is designed for direct-fit service where a standard 174°F thermostat is specified, including many Volkswagen Golf, Jetta, Beetle, Passat, and Volvo S40/V40/S60/V70 applications.

Key Features

• Part number 234-174
• 174°F start-to-open temperature for standard cooling system operation
• Copper case and wax compound for quick response to coolant temperature changes
• OE supplier manufacturing with OEM quality materials and safety standards
• Offset design with air relief valve where applicable
• OEM-style seals included where applicable
• Sealing flange outside diameter: 2.12 in
• Height between flanges: 1.4 in
• Bypass diameter: 1.38 in
• Bypass length: 1.23 in

Detailed Description

The Motorad 234-174 thermostat regulates engine coolant temperature by opening at 174°F to maintain proper operating conditions. Its copper case and wax compound are engineered for fast reaction to temperature changes, helping the cooling system respond consistently during warm-up and normal driving. This Standard line thermostat is built to OEM specifications and processes, making it a practical replacement for vehicles that call for a 174°F engine coolant thermostat.

Compatible With 1972-2013 Volkswagen, Volvo, Audi, Ford, Porsche, and Mercury applications, including many Volkswagen Golf, Jetta, Beetle, Passat, and Volvo S40/V40/S60/V70 models. This part cross-references Anchor 3377 for the same application.

What It Helps Address

• Engine running too cool or too warm due to thermostat wear
• Delayed coolant circulation during warm-up
• Temperature fluctuation from a sticking thermostat
• Cooling system service on OE-specified 174°F applications
• Replacement of a thermostat with incorrect opening temperature

Installation Notes and Tips

Verify the engine calls for a 174°F thermostat before installation. Match the housing and bypass dimensions to the original part, and inspect the sealing surfaces for corrosion or debris. Because no gasket or seal is included, use the correct seal or gasket specified for the vehicle application. Bleed trapped air from the cooling system after installation to help restore normal coolant flow.

Quality Assurance

Motorad manufactures this thermostat with OEM quality materials and safety standards as an OE supplier. The Standard line is built to OEM specifications for consistent fit and temperature control in the intended applications.