Motorad 920-181 Engine Coolant Thermostat

OE-Style 181°F Thermostat for Porsche Cooling Systems

The Motorad Standard 920-181 engine coolant thermostat is built for precise temperature control in demanding cooling systems. It uses OEM-quality materials and OE-spec manufacturing methods to deliver fast response to coolant temperature changes, with a copper case and wax compound for consistent operation.

Compatible With 2003-2006 Porsche Cayenne, 2004-2005 Porsche Carrera GT, and 2007-2008 Porsche 911 applications that call for a 181°F thermostat insert. It also fits 2011 Porsche 911 and 2007-2008 Porsche 911 applications noted for OE-specified 181°F service.

Key Features

• Motorad Standard 920-181 engine coolant thermostat
• 181°F start-to-open temperature for OE-specified thermal control
• OEM-quality materials and OE supplier manufacturing standards
• Copper case and wax compound for quick reaction to coolant temperature changes
• Offset design with air relief valve where applicable
• OEM-style seals included where applicable
• Standard thermostat type for direct cooling-system service

Product Details

The Motorad Standard line focuses on OE-style replacement parts built to match factory specifications and processes. This thermostat is engineered for Porsche cooling systems that require stable operating temperature control, helping the engine reach and maintain the intended coolant temperature range. The 920-181 part number is a direct reference for buyers searching for a Porsche 911 thermostat 181°F, a Porsche Cayenne thermostat insert, or a Carrera GT coolant thermostat replacement.

This part cross-references Dorman - HELP 59208 for the same application.

What This Thermostat Helps Address

• Engine running cooler or warmer than specified
• Delayed coolant temperature regulation after startup
• Temperature fluctuation in the cooling system
• Thermostat replacement during cooling-system service
• OE-spec thermostat insert replacement for Porsche 911, Cayenne, and Carrera GT applications

Installation Notes and Tips

• Verify the vehicle’s OE-specified thermostat temperature before installation.
• Confirm the application notes for insert-only service where listed.
• Inspect the housing, seals, and coolant condition during replacement.
• Follow the manufacturer’s cooling-system bleed procedure to remove trapped air.
• Use the correct coolant mix and torque specifications for the vehicle.

Quality Assurance

Motorad manufactures this thermostat to OEM specifications and processes using materials selected for demanding automotive cooling systems. The 920-181 is built as an OE-style replacement for Porsche applications requiring 181°F temperature control.