Gates 34054S Engine Coolant Thermostat

Gates Premium Thermostat 34054S Overview

The Gates Premium Thermostat 34054S is an engine coolant thermostat built for OE-style temperature control in select GM and Saturn applications. It uses stainless steel and copper construction, an O-ring seal, and a jiggle pin weep hole to support stable coolant flow and corrosion resistance.

Compatible With 2006-2011 Chevrolet Impala, 2006-2010 Chevrolet Malibu, and other listed Buick, Pontiac, Saturn, and Chevrolet models, this thermostat is specified at 185 degrees for applications that call for OE temperature control. The Gates Premium Thermostat line focuses on durable construction and improved spring stability for normal operating conditions.

Key Features

• Gates Premium Thermostat part number 34054S
• 185 degree start-to-open temperature
• Stainless steel and copper construction for corrosion resistance
• Bottom by-pass design with O-ring seal
• Jiggle pin weep hole for air bleeding during service
• Heavy-gauge construction with an upgraded spring for temperature stability
• Fits select Buick Lucerne, Chevrolet Impala, Chevrolet Malibu, Pontiac G6, Saturn Vue, and related applications

Product Details

This engine coolant thermostat regulates coolant flow to help the engine reach and maintain the correct operating temperature. The 34054S is built with a stainless steel body and copper components, along with a bottom by-pass design and a single seal for a direct-fit service replacement. The 185 degree opening point matches OE-temperature applications across the listed 2006-2011 Buick, Chevrolet, Pontiac, and Saturn vehicles. If you are replacing a thermostat on a Chevrolet Impala, Malibu, or Pontiac G6, Gates 34054S provides the temperature control and sealing profile specified for those platforms.

This part cross-references Motorad 511-185 for the same application.

Common Issues This Part Can Address

• Engine running too cool or taking too long to reach operating temperature
• Temperature fluctuation caused by a worn thermostat spring
• Coolant flow problems related to a sticking thermostat valve
• Corrosion-related thermostat housing wear in cooling system service
• Seal leakage at the thermostat interface

Installation Notes

Verify the OE temperature specification before installation and confirm the bottom by-pass layout matches the original part. Inspect the sealing surface, replace damaged coolant hoses or housing components as needed, and bleed trapped air from the cooling system after service. The jiggle pin weep hole should be oriented according to the vehicle service procedure when applicable.

Quality Assurance

Gates Premium Thermostats are built with heavy-gauge stainless steel construction and an upgraded spring to improve corrosion resistance and temperature stability under normal operation conditions. Part number 34054S is engineered for the listed fitments and OE-style cooling system service.