Gates 34298 Engine Coolant Thermostat

Gates 34298 Heavy-Duty Thermostat Overview

The Gates 34298 Heavy-Duty Thermostat is an engine coolant thermostat built for demanding cooling systems in heavy-duty truck, bus, tractor, and heavy equipment service. It uses a steel and copper construction with a bottom by-pass design to help regulate coolant flow under harsh underhood conditions.

For buyers searching for a Gates thermostat for heavy-duty cooling repair, this Green Stripe thermostat is built around durability-focused construction and a jiggle pin weep hole for air bleeding during service. It is a direct-fit style replacement for applications that call for a 180 degree opening temperature.

Key Features

• Part number: 34298
• Heavy-Duty Thermostat from Gates Green Stripe line
• Steel and copper construction
• Bottom by-pass design
• Start to open temperature: 180°F / 82°C
• Jiggle pin weep hole included
• Sealing flange outside diameter: 2.12 in.
• By-pass flange diameter: 1.34 in.
• Height: 2.04 in.; height between flanges: 1.2 in.
• Height from flange: .84 in.

Heavy-Duty Thermostat Line Details

Gates Green Stripe Heavy-Duty Thermostats are engineered for commercial-duty cooling systems where vibration, noise, and heat cycling place extra stress on thermostat components. The 34298 follows that product-line focus with a metal construction and a service-friendly jiggle pin design for controlled coolant flow and easier air purge during filling.

This Gates 34298 thermostat is a practical choice for heavy-duty cooling service on truck, bus, tractor, and equipment platforms that specify a bottom by-pass thermostat with a 180°F opening point. It is also a relevant search match for buyers looking for a heavy-duty thermostat for Ford F-Series, Chevrolet Silverado, or Dodge Ram diesel and commercial cooling applications when the vehicle’s OE specification calls for this part number.

What It Helps Address

• Engine running too cool or too hot due to thermostat sticking
• Slow warm-up after cold starts
• Temperature swings caused by inconsistent coolant regulation
• Air trapped in the cooling system after service
• Cooling-system service on heavy-duty truck, bus, tractor, and equipment applications

Installation Notes

Verify the thermostat style, opening temperature, flange dimensions, and bottom by-pass configuration against the original part before installation. Clean the housing sealing surfaces thoroughly and inspect the cooling system for contamination, corrosion, or restricted flow before fitting the new thermostat.

Use the jiggle pin orientation recommended by the vehicle manufacturer when installing the Gates 34298. This part cross-references Dorman - HELP 34298 and Carlson 15208 for the same application.

Quality Assurance

Gates designs its Green Stripe heavy-duty thermostat line for commercial cooling environments where durability and stable temperature control matter. The 34298 is built with steel and copper materials to support consistent operation in demanding service conditions.