Gates 33429 Engine Coolant Thermostat

Gates OE Type Thermostat 33429

Gates OE Type Thermostat 33429 delivers precise coolant temperature control for a wide range of GM, Suzuki, Isuzu, and Geo applications. Built for an OEM-equivalent fit, this engine coolant thermostat supports stable operating temperature in vehicles such as the Chevrolet Impala, Buick Regal, and Pontiac Grand Prix.

Key Features

• OE Type thermostat for direct replacement service
• Offset reverse poppet design for proper coolant flow control
• Steel and copper construction
• 195 degree start-to-open temperature
• Jiggle pin weep hole included for air bleeding during service
• OE Performance comparison rating
• Gates part number 33429 for catalog and fitment reference

Product Details

The Gates OE Type Thermostat line is built around factory-style temperature regulation and leak-free fitment. Part number 33429 uses an offset reverse poppet design and a steel-and-copper body to match the demands of OE-style cooling system service. With a 195 degree start-to-open temperature, it is specified for applications that require standard operating temperature control rather than a lower-temperature performance setup. This thermostat is listed for many long-tail fitment searches, including 2000-2005 Chevrolet Impala thermostat replacement, 1996-2008 Pontiac Grand Prix coolant thermostat, and 1990-2004 Buick Regal engine thermostat service.

This part cross-references Four Seasons 33429 for the same application.

Common Problems This Part Addresses

• Engine running too cool or too hot due to a worn thermostat
• Slow warm-up after cold starts
• Temperature fluctuation during stop-and-go driving
• Cooling system service on OE-temperature applications
• Replacement needs on vehicles such as the Buick LeSabre, Chevrolet Monte Carlo, and Pontiac Bonneville

Installation Notes and Tips

Verify the housing style, sealing flange dimensions, and temperature specification before installation. Clean the thermostat housing and mating surfaces thoroughly, and inspect the coolant condition before refilling the system. Because no installation tool is included, use standard cooling system service procedures and bleed trapped air through the jiggle pin weep hole as required.

Quality Assurance

Gates engineers this OE Type Thermostat to provide precise temperature control and an OEM-equivalent fit. The OE Performance rating reflects its focus on factory-style operation for compatible cooling system applications.