Gates 33469S Engine Coolant Thermostat

Gates Premium Thermostat 33469S Overview

The Gates Premium Thermostat 33469S is an engine coolant thermostat built for Ford and Lincoln cooling systems that call for a 192-degree opening temperature. It uses stainless steel and copper construction for improved corrosion resistance, along with an upgraded spring to help maintain stable operating temperature under normal conditions.

Compatible With Ford E-150, E-250, F-150, F-250 Super Duty, F-350 Super Duty, Expedition, Explorer, Mustang, and related Lincoln and Mercury applications, this thermostat supports OE-temperature cooling performance across a wide range of trucks, vans, and SUVs.

Key Features

• Premium thermostat design for engine coolant temperature control
• Heavy-gauge stainless steel and copper construction
• 192-degree start-to-open temperature
• Bottom by-pass design
• Jiggle pin weep hole for air bleeding during service
• Upgraded spring for improved temperature stability
• Sealing flange outside diameter: 2.13 in.
• Height between flanges: 1.29 in.

Product Details

Gates Premium Thermostat 33469S is engineered for applications that require consistent coolant flow regulation at OE temperature. The stainless steel body helps resist corrosion in demanding cooling systems, while the copper material supports durable thermal performance. The bottom by-pass configuration and jiggle pin weep hole help the thermostat integrate properly into the cooling circuit and assist with air evacuation during installation and service. This part cross-references Four Seasons 33469 for the same application.

Fits 1996-2019 Ford E-350 Super Duty, 1997-2014 Ford Expedition, 1997-2010 Ford F-150, and other listed Ford, Lincoln, and Mercury models. Part number 33469S is also referenced in applications for Ford E-Series vans, Super Duty trucks, and select Lincoln Navigator and Mercury Grand Marquis vehicles.

Common Cooling System Issues Addressed

• Engine running cooler or warmer than the specified operating range
• Delayed coolant circulation after cold start
• Temperature fluctuation during normal driving
• Corrosion-related thermostat wear in the cooling system
• Air trapped in the cooling circuit after service

Installation Notes and Tips

Verify the 192-degree temperature specification, bottom by-pass design, and flange dimensions before installation. Clean the thermostat housing and sealing surfaces thoroughly, and confirm the jiggle pin orientation follows the vehicle service procedure. Because no installation tool is included, use the correct service tools for the housing and coolant system. After installation, refill and bleed the cooling system according to factory procedure to help prevent trapped air.

Quality Assurance

Gates Premium Thermostats are built with corrosion-resistant materials and an upgraded spring design to support stable temperature control in normal operation. The 33469S is manufactured to meet the fitment and performance expectations of the listed Ford, Lincoln, and Mercury applications.