Gates 33078 Engine Coolant Thermostat

OE Type Thermostat for Precise Cooling Control

Gates OE Type Thermostat 33078 is built for accurate engine temperature regulation and a leak-free OEM-equivalent fit. It is a direct replacement thermostat for a wide range of Ford, Volkswagen, Mazda, Mercury, Porsche, Jaguar, Dodge, Volvo, and Mercedes-Benz applications, including Ford Ranger, Ford Explorer, and Volkswagen Jetta cooling system service.

Key Features

• OE Type Thermostat design for factory-style temperature control
• Start-to-open temperature rated at 174°F / 79°C and 180°F / 82°C variants listed for application coverage
• Bottom by-pass design for the specified cooling system layout
• Stainless steel and copper construction for corrosion resistance and stable operation
• Jiggle pin weep hole included to help purge trapped air during filling
• OE Performance comparison rating for OEM-equivalent fit and function
• Gates part number 33078 for easy catalog matching

Product Details

The Gates OE Type Thermostat line is engineered for precise temperature control and consistent sealing performance. Part number 33078 uses a bottom by-pass configuration with a jiggle pin weep hole, stainless steel and copper materials, and OE-style dimensions to match the original cooling system layout. This thermostat is listed for applications such as 2001-2011 Ford Ranger, 1997-2010 Ford Explorer, 2005-2010 Ford Mustang, 2001-2010 Mazda B4000, and 1994-2004 Volkswagen Jetta, along with additional coverage across the fitment list. This part cross-references Monroe Shocks & Struts (e.g., 34675) for the same application.

What It Helps Address

• Engine running too cool or too hot due to thermostat wear
• Slow warm-up after cold starts
• Temperature fluctuation from a sticking thermostat
• Coolant flow issues related to a worn sealing surface
• Air pockets in the cooling system during refill service

Installation Notes and Tips

Verify the OE-style dimensions, bottom by-pass layout, and start-to-open temperature before installation. Clean the housing mating surfaces thoroughly and inspect the coolant system for contamination, corrosion, or damaged seals before reassembly. Because no installation tool is included, use the correct service tools for your vehicle and follow the manufacturer’s cooling system bleed procedure after filling.

Quality Assurance

Gates OE Type Thermostats are built to OE Performance standards for fit and temperature control. The 33078 is engineered to provide OEM-equivalent installation and leak-free operation when matched to the listed applications.