Motorad 274-174 Engine Coolant Thermostat

Reliable Engine Coolant Thermostat for BMW Models

The Motorad Standard 274-174 engine coolant thermostat is designed to maintain optimal engine temperature for a range of BMW vehicles. Engineered to open at 170 degrees Fahrenheit, this thermostat helps regulate coolant flow and ensures efficient engine performance.

• Sealing flange outside diameter: 2.64 inches
• Bypass diameter: 1.30 inches
• Bypass length: 1.02 inches
• Flange thickness: 0.05 inches
• Temperature rating: 170°F (77°C)
• Gasket or seal not included
• No jiggle pin weep hole

About the Motorad Standard Product Line

The Motorad Standard line offers dependable replacement parts that meet OEM specifications for cooling system components. The 274-174 thermostat is part of this line, providing consistent temperature control and durability for BMW engines. This product line focuses on delivering quality components without additional installation tools or seals, allowing for straightforward integration with existing vehicle parts.

Product Details and Specifications

This engine coolant thermostat features a sealing flange outside diameter of 2.64 inches, ensuring a secure fit within the cooling system housing. The bypass diameter of 1.30 inches and bypass length of 1.02 inches facilitate proper coolant circulation during engine warm-up. With a flange thickness of 0.05 inches, the thermostat maintains a compact profile suitable for precise installation. The thermostat opens at 170 degrees Fahrenheit, helping to prevent engine overheating by regulating coolant flow based on temperature.

Compatible BMW Models and Applications

• BMW 320i, 323i, 323is, 323ti
• BMW 325e, 325i, 325is, 325iX
• BMW 328i, 328is
• BMW 525i, 528e, 535i, 535is
• BMW 635CSi, 735i, 735iL, 850Ci
• BMW M3, M5, M6, Z3

Common Issues Addressed by This Thermostat

• Engine overheating due to thermostat failure
• Poor engine warm-up performance
• Inconsistent coolant flow causing temperature fluctuations
• Reduced fuel efficiency from improper engine temperature regulation
• Potential engine damage from prolonged overheating

Installation Notes and Tips

When installing the Motorad Standard 274-174 thermostat, ensure the sealing flange matches the housing dimensions for a proper fit. Note that this thermostat does not include a gasket or seal, so use the existing or a new compatible gasket to prevent leaks. Verify the bypass diameter and length align with your vehicle’s cooling system specifications. No installation tool is included, so standard automotive tools will be required for removal and installation.

Quality Assurance and Warranty

Motorad Standard thermostats are manufactured to meet OEM standards for durability and performance. While specific warranty details are not provided, Motorad products typically undergo rigorous quality control to ensure reliable operation in BMW cooling systems.