Gates 33778 Engine Coolant Thermostat

Gates OE Type Thermostat 33778 Overview

The Gates OE Type Thermostat 33778 is an engine coolant thermostat built for precise temperature control and an OEM-equivalent fit. It is a direct replacement choice for a wide range of Ford, Mazda, Suzuki, Geo, Chevrolet, GMC, and Pontiac applications, including Ford Explorer, Ford Ranger, and Mazda B4000 models.

Gates OE Type Thermostat products are part of the brand’s OE Type line, focused on factory-style fitment and consistent cooling system operation. For buyers searching for an OE-style thermostat for a 1991-2000 Ford Explorer or a 1986-2000 Ford Ranger, this part number is a relevant match.

Key Features

• OE Type Thermostat for engine cooling system service
• Start-to-open temperature: 180 degrees
• Reverse poppet design for application-specific flow control
• Steel and copper construction
• Jiggle pin weep hole included for air bleeding during service
• OE Performance comparison rating
• Part number 33778 for catalog and fitment lookup

Detailed Product Description

The Gates 33778 thermostat is engineered to regulate coolant flow at the specified 180-degree opening point, helping the engine reach and maintain operating temperature. Its reverse poppet design, steel and copper materials, and OE-style dimensions support a leak-free seal and factory-equivalent installation profile. This makes it a practical replacement for cooling system maintenance on vehicles such as the Ford Explorer, Ford Ranger, and Mazda B4000, as well as select Suzuki, Geo, Chevrolet, GMC, Pontiac, and Mazda applications.

This part cross-references Motorad 201-180JV and 333-180 for the same application.

What It Helps Address

• Engine running too cool or taking too long to warm up
• Temperature fluctuation caused by a worn thermostat
• Coolant flow control issues in the cooling system
• Leak concerns related to an aging thermostat assembly
• Service replacement needs for OE-style cooling maintenance

Installation Notes and Tips

• Verify the 180-degree temperature specification before installation.
• Confirm fitment by year, make, and model, especially on Ford Explorer, Ford Ranger, and Mazda B4000 applications.
• Inspect the thermostat housing and sealing surfaces before reassembly.
• Use the jiggle pin weep hole orientation recommended for the vehicle’s cooling system layout.
• Refill and bleed the cooling system according to factory service procedures after installation.

Quality Assurance

Gates OE Type Thermostats are built to deliver precise temperature control and an OEM-equivalent fit. The 33778 is listed with OE Performance comparison and is engineered for direct replacement use across confirmed applications from 1986-2000, including Ford Explorer, Ford Ranger, and Mazda B4000 coverage.