Cummins 3931374 Replacement Thermostat for the SB/ISC/QSB engines.

ISB/ISC/QSB Cummins 3931374 Replacement Thermostat

The Cummins 3931374 thermostat is a precise, OEM replacement designed to maintain optimal engine temperatures and protect your Cummins ISB, ISC, and QSB diesel engines. Engineered with advanced sealing technology, this thermostat ensures reliable coolant regulation, enhanced engine efficiency, and long-lasting durability. Whether you’re looking to purchase a replacement thermostat for your Cummins engine or simply upgrade your cooling system, this part delivers the consistency and performance you expect.

Key Features

• OEM quality construction for dependable performance
• Advanced sealing technology that minimizes leaks
• Accurate temperature regulation to prevent overheating
• Compatibility with select Cummins ISB, ISC, and QSB engines

Benefits & Technical Details

• Prevents engine overheating by ensuring a controlled coolant flow
• Enhances overall engine efficiency and maintains factory operating temperatures
• Provides a reliable, non-returnable solution once proper verification is completed
• Technical Data:
  • Engine Type: Cummins ISB/ISC/QSB
  • Part Number: 3931374
  • Thermostat Opening Temperature: Specific values available on request
  • Manufactured in the USA

Please ensure you enter your engine serial number at checkout for accurate part verification. For a complete range of quality Cummins parts, consider browsing our collections on Cummins OEM Replacement Parts and Cummins Thermostats.