Motorad 304-198 Engine Coolant Thermostat

Reliable Engine Coolant Thermostat for Audi and Volkswagen Models

The Motorad Standard 304-198 engine coolant thermostat is designed to maintain optimal engine temperature for select Audi and Volkswagen vehicles. Engineered to open at 198°F, this thermostat ensures efficient coolant flow and engine performance.

• Sealing flange outside diameter: 2.64 inches
• Height between flanges: 1.37 inches
• Standard type thermostat with jiggle pin weep hole
• Bypass diameter: 1.37 inches; bypass length: 1.50 inches
• Flange thickness: 0.05 inches
• Start to open temperature: 198°F
• Compatible with Audi A4, A4 Quattro, A6, A6 Quattro, and Volkswagen Passat

About the Motorad Standard Product Line

The Motorad Standard line offers dependable engine cooling components designed to meet OEM specifications. The 304-198 thermostat from this line provides consistent temperature regulation without additional seals or installation tools, focusing on straightforward replacement and reliable operation for compatible Audi and Volkswagen models.

Detailed Product Description

This engine coolant thermostat features a sealing flange outside diameter of 2.64 inches and a height of 1.95 inches, ensuring a precise fit within the cooling system. The jiggle pin weep hole allows trapped air to escape, preventing airlock and promoting smooth coolant circulation. With a bypass diameter of 1.37 inches and a bypass length of 1.50 inches, it supports proper coolant flow during engine warm-up phases. The thermostat opens at 198°F, maintaining optimal engine temperature for efficient performance and emission control.

Common Applications and Issues Addressed

• Prevents engine overheating by regulating coolant flow
• Resolves erratic temperature gauge readings
• Eliminates coolant leaks caused by faulty thermostat seals
• Improves engine warm-up time and fuel efficiency
• Prevents engine damage due to improper coolant circulation

Installation Notes and Tips

This thermostat does not include a gasket or seal, so ensure the existing gasket is in good condition or replace it during installation. No special installation tools are required, but careful handling is recommended to avoid damage to the sealing flange. Verify compatibility with your Audi or Volkswagen model before installation to ensure proper fit and function.

Quality Assurance and Warranty

The Motorad Standard 304-198 thermostat is manufactured to meet industry standards for durability and performance. While no specific warranty information is provided, Motorad products typically adhere to strict quality control processes to ensure reliable operation in compatible vehicles.