Cummins 4309185 Replacement Thermostat QSB 3.3L engines

QSB 3.3L Cummins 4309185 Replacement Thermostat

PLEASE ENTER YOUR ENGINE SERIAL NUMBER - ESN SO WE CAN VERIFY THE CORRECT THERMOSTAT FOR YOUR ENGINE. CUMMINS PARTS ARE NON-REFUNDABLE. You must enter your ESN to purchase this part.  If you are using the part number from the actual part in hand, you may enter it in the ESN field to verify this is the part you want. 

The Cummins Replacement Thermostat Kit 4309185 is used primarily on:

• ISB engines.

• QSB engines.

NOTE: We request you provide the ESN to ensure you are ordering the correct OEM Cummins replacement thermostat for your engine.

This Cummins 4309185 Thermostat is an OEM replacement Thermostat for Cummins QSB 3.3L Diesel engines. This thermostat is the stock replacement part needed for a leak-proof change for the correct engine operating temperatures. This Cummins Thermostat contains the following required Original Equipment Manufacturer parts:

• Thermostat

This Cummins 4309185 Replacement Thermostat applications:

• Select QSB 3.3L Diesel Engines
• Select ISB 3.3L Diesel Engines

Note: If your QSB 3.3L engine is experiencing coolant temperature gauge cycling, replace your existing thermostat with this Cummins 4309185 xxx thermostat. The new Cummins 4309185 thermostat provides a slower coolant response rate to reduce dramatic engine temperature cycling. This slower engine response rate does not affect the engine performance.

The Cummins 4309185 Thermostat on your QSB 3.3L Cummins engine allows low-temperature coolant from the radiator into the engine to keep the operating temperature within a predetermined range. Operating a Cummins engine with a bad thermostat will cause the thermostat to get stuck in the open or closed position. A defective thermostat will cause the engine to operate either below the correct operating temperature or above it leading to an overheat condition. If you are currently experiencing any of these symptoms, it's time to replace the Cummins thermostat to alleviate this issue.

The use of Genuine Cummins parts means you get a precision design, state-of-the-art manufacturing, and diligent testing which ensures optimum engine performance at the Cummins factory-specified level. Only Genuine Cummins parts come with a full factory warranty, giving you peace of mind and financial protection.

This 4309185 Replacement Cummins OEM  Thermostat is for the QSB 3.3L Cummins engines that are MADE IN THE USA!

The Cummins 4309185 Thermostat supersedes the:

• Cummins Thermostat for Cummins QSB 3.3L Engine

This OEM Cummins Thermostat Benefits:

• Purchasing Genuine Cummins parts means you get a precision-designed product.
• Cummins parts are manufactured at state-of-the-art facilities.
• Strict quality control measures and diligent testing that ensures the replacement parts perform at Cummins factory-specified levels of efficiency,
• Genuine Cummins parts come with a full factory warranty, giving you peace of mind and financial protection.
• Only Genuine Cummins parts provide the reliability and durability you need to stay on the road.