Gates 33911 Engine Coolant Thermostat

Integrated Housing Thermostat for OE Temperature Control

The Gates 33911 integrated housing thermostat is built for direct replacement in cooling systems that use a thermostat and housing assembly together. It helps maintain accurate engine coolant temperature for steady operation in vehicles such as the Saturn L300, Cadillac CTS, Saab 9-5, and Saturn Vue.

Gates’ Integrated Housing Thermostat line focuses on OE-style replacement for applications where the thermostat is part of the housing, helping simplify service on modern cooling systems. Part number 33911 is an OE Exact replacement with the correct outlet dimensions and seal configuration for listed applications.

Key Features

• Integrated housing thermostat design for applications that use a combined thermostat and housing assembly
• Start-to-open temperature: 198°F / 92°C
• OE Exact rating for direct-fit replacement
• Jiggle pin weep hole included for air bleeding
• 2 bolt holes for mounting
• 1 seal and 1 jiggle pin/check valve
• Outlet inside diameter: 1.42 in.
• Outlet outside diameter: 1.62 in.
• Non-electric design

Product Details

The Gates 33911 thermostat is engineered for vehicles that rely on an integrated thermostat housing to regulate coolant flow. By opening at the specified temperature, it helps the engine reach and maintain normal operating temperature, which is important for consistent heater performance, emissions control, and cooling system stability. This part number 33911 is listed for multiple GM and Saab applications, including 2001-2005 Saturn L300, 2003-2004 Cadillac CTS, 1999-2003 Saab 9-5, and 2002-2003 Saturn Vue.

This part cross-references Dorman - OE Solutions 902-691 and Motorad 349-198 for the same application.

Common Cooling System Issues It May Address

• Engine running too cool or taking too long to reach operating temperature
• Temperature fluctuations caused by a worn thermostat assembly
• Coolant flow control problems in integrated housing systems
• Check engine light concerns related to thermostat performance
• Reduced cabin heat from improper coolant temperature regulation

Installation Notes and Tips

• Verify the vehicle uses an integrated housing thermostat before ordering.
• Match the outlet diameter, bolt hole count, and temperature rating to the original part.
• Inspect the mating surfaces and cooling passages before installation.
• Bleed air from the cooling system after service to help prevent hot spots and temperature irregularities.
• Confirm fitment by year, make, and model for the exact application listed.

Quality Assurance

Gates develops aftermarket thermostat solutions for integrated housing applications with OE-style fit and temperature control in mind. Part number 33911 is an OE Exact replacement for the listed Saturn, Cadillac, and Saab vehicles, including 1994-2005 applications shown in the fitment data.