Gates 34198 Engine Coolant Thermostat

Reliable Engine Cooling with Gates OE Type Thermostat 34198

The Gates OE Type Thermostat 34198 is engineered to maintain optimal engine temperature for a range of GM vehicles including Chevrolet Silverado, GMC Sierra, and Cadillac Escalade. Designed with durable steel and copper materials, this thermostat ensures consistent performance and longevity in demanding driving conditions.

• Constructed from steel and copper for durability and heat resistance
• OE type thermostat design with bottom by-pass for efficient coolant flow
• Sealing flange outside diameter of 2.2 inches and height between flanges of 2.1 inches
• Features a jiggle pin weep hole and O-ring seal for reliable sealing and pressure regulation
• Starts to open at 187°F (86°C) to maintain precise engine temperature control
• Compatible with multiple GM makes and models including Buick, Cadillac, Chevrolet, GMC, Hummer, and Saab

About the Gates OE Type Thermostat Product Line

The OE Type Thermostat line from Gates is designed to meet original equipment specifications, providing a direct replacement that matches the fit, form, and function of the factory-installed thermostat. This ensures proper engine temperature regulation and coolant flow, helping maintain engine efficiency and reduce wear. The 34198 part number is part of this line, offering OE performance standards for reliable operation in various GM vehicles.

Detailed Product Description

This engine coolant thermostat features a bottom by-pass design that allows coolant to circulate even when the thermostat is closed, preventing hot spots and promoting faster warm-up times. The thermostat’s height is 2.83 inches with a by-pass flange diameter of 1.57 inches, fitting precisely within the cooling system housing. The inclusion of a jiggle pin weep hole helps release trapped air, reducing the risk of overheating. The O-ring seal ensures a tight fit without leaks, and the thermostat does not include additional gaskets, simplifying installation.

Compatible Vehicles and Applications

• Buick 9-7x
• Cadillac Escalade, Escalade ESV, Escalade EXT, CTS
• Chevrolet Avalanche, Camaro, Colorado, Corvette, Express 1500/2500/3500, Silverado 1500/2500/3500, Suburban 1500/2500/3500 HD, Tahoe, Trailblazer
• GMC Canyon, Sierra 1500/2500/3500, Yukon, Yukon XL 1500/2500
• Hummer H2, H3
• Saab models

Common Issues Addressed by This Thermostat

• Engine overheating due to thermostat failure
• Inconsistent engine temperature regulation
• Coolant flow restriction causing hot spots
• Premature engine wear from improper temperature control
• Air trapped in cooling system causing inefficient cooling

Installation Notes and Tips

This thermostat does not include an installation tool, so using the proper tools for removal and installation is recommended. Ensure the O-ring seal is properly seated to prevent leaks. Since no gaskets are included, inspect the housing and replace any worn gaskets as needed. The bottom by-pass design requires correct orientation during installation to function properly.

Quality Assurance and Warranty

The Gates OE Type Thermostat 34198 is manufactured to meet OE performance standards, ensuring reliable operation and durability. Gates provides quality assurance backed by their industry reputation, though specific warranty details should be confirmed with the parts distributor or manufacturer documentation.