Cummins 4318947 180 Degree Thermostat

Cummins 4318947 Replacement Thermostat Kit

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 EIN field to verify this is the part you require for your Cummins diesel engine. 

This 180 Degree Cummins 4318947 Thermostat is an OEM replacement Thermostat for select Cummins ISM, Cummins ISX15, Cummins ISX12, and Cummins ISM Diesel engines. This thermostat is the stock replacement part needed for a leak-proof change for the correct engine operating temperatures.

This Cummins Thermostat Kit contains the following required Original Equipment Manufacturer parts:

• Cummins 4318947 Thermostat

This OEM Cummins 4318947 is a Direct Replacement For Single Thermostat Configurations in the following engines: 

• Select Cummins ISX Diesel Engines
• Select Cummins ISX15 Diesel Engines
• Select Cummins ISZ13 Diesel Engines
• Select Cummins QSX15 Diesel Engines
• Select Cummins QSZ13 Diesel Engines
• Select Cummins X12 Diesel Engines
• Select Cummins X15 Diesel Engines

This 4318947 Replacement Cummins OEM  Thermostat is for the OEM Cummins 4318947 Replacement Thermostat For ISX15, ISX12, And ISM Single Thermostat Configurations. These OEM Cummins engine parts are MADE IN THE USA! 

This OEM Cummins 4318947 180-Degree Thermostat Kit Supersedes:

• Cummins 4318197

This OEM Cummins Replacement Thermostat Kit 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 ensure 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.

Technicians have observed instances where thermostats have become stuck in the open position within the housing cover. Upon removal of the thermostat, it will close and no longer be stuck open. If the elastomer seal on the thermostat flange has failed, the metal flange will be exposed due to loss of elastomer material.

If this issue occurs, we recommend the purchase of this new, updated, and redesigned Cummins 4318947 thermostat to address both the stuck open and flange seal failure modes that were reported. The new Cummins Part Number 4318947 thermostat design has a higher force return spring, which resulted in taller spring retaining arms. The thermostat's flange seal has reverted back to a previous design using a 3-piece construction. This 3-piece flange consists of a metal flange, elastomeric seal, and steel retaining ring. 

NOTE: This new thermostat, Part Number 4318947, is not compatible with engines assembled with dual thermostat housing options. The result of longer spring and spring retaining arms results in contact with the dual thermostat housing, preventing the thermostat from functioning properly. For engines using dual thermostat housing, use Part Number 4336659 for repairs.

Note: If your ISX and ISM engine is experiencing coolant temperature gauge cycling, replace your existing thermostat with this Cummins 4318947 180-degree thermostat. The new Cummins 4318948 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 4318947 Thermostat on your ISX15, ISX12, and ISM 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 overheating 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.

NOTE: We ask you to provide the ESN for your Cummins engine to provide the correct part for your engines. 

Cummins Thermostat 4318197 180 Degree Opening Temperature Non-Vented Coolant Thermostat fits select Cummins ISX Series and Cummins ISM Series Applications.

• Engine: Cummins ISM | Cummins ISX15 | Cummins ISX12
  
• Thermostat Opening Temperature: 180°F
• Thermostat Full Opening Temperature: 202°F
• Item Number: Cummins 4318947
• Make: Cummins 
• Model: ISM | ISN | ISX | QSX |
• Year: 
• Manufacturer Part No: Cummins 4318947
• Product Application: Cummins ISM. Cummins ISX15 and Cummins ISX12 Engines require a replacement 180 Degree Thermostat.
• Height: 3
• Width: 3
• Brand: Cummins
• FAQ: Why should you purchase a Genuine Cummins Thermostat for your diesel engine?  Installation of an OEM Cummins 4318947 Thermostat Kit ensures your engine maintains its factory performance, power output levels, function, and straightforward fitment. OEM parts will provide an exact replacement that is trouble-free and leak-free repair of the engine's cooling system.
• Part Number: 4318947
• Manufacturer: Cummins
• Product Note: Cummins Parts Are A Non-Returnable Item. Please ensure you have ordered the correct part for your Cummins diesel engine!