Cummins 6CT 6D114 Oil Cooler Core 3974815 | Diesel Engine Oil Cooler Assembly
The Cummins Oil Cooler Core 3974815 is designed for Cummins 6CT, 6D114, 6CTA, and C8.3 diesel engine applications and is widely used in construction machinery, trucks, generator sets, and industrial diesel equipment.
As an important component of the engine lubrication cooling system, the oil cooler core helps regulate engine oil temperature by transferring excess heat from the lubricating oil to the cooling system, ensuring stable engine operating conditions.
Manufactured according to OEM specifications with durable heat-exchange structure and precision assembly technology, the oil cooler core provides reliable cooling efficiency, stable oil circulation performance, and dependable durability under demanding heavy-duty operating environments.
This product is commonly applied in excavators, loaders, commercial vehicles, generator engines, and industrial machinery requiring efficient engine lubrication cooling performance.
As an important component of the engine lubrication cooling system, the oil cooler core helps regulate engine oil temperature by transferring excess heat from the lubricating oil to the cooling system, ensuring stable engine operating conditions.
Manufactured according to OEM specifications with durable heat-exchange structure and precision assembly technology, the oil cooler core provides reliable cooling efficiency, stable oil circulation performance, and dependable durability under demanding heavy-duty operating environments.
This product is commonly applied in excavators, loaders, commercial vehicles, generator engines, and industrial machinery requiring efficient engine lubrication cooling performance.


Applications
● Cummins 6CT diesel engines
● Cummins 6D114 / 6CTA / C8.3 engines
● Heavy-duty trucks
● Mining equipment
● Construction machinery
● Industrial diesel equipment
● Engine cooling system repair and replacement projects
● Cummins 6D114 / 6CTA / C8.3 engines
● Heavy-duty trucks
● Mining equipment
● Construction machinery
● Industrial diesel equipment
● Engine cooling system repair and replacement projects
Product Advantages
● Efficient Oil Temperature Control
The oil cooler core helps reduce excessive engine oil temperature during operation, supporting stable lubrication performance and preventing overheating under heavy-load working conditions.
● Improves Engine Lubrication Protection
By maintaining proper oil temperature and viscosity, the cooler helps improve lubrication efficiency and reduce wear on pistons, bearings, crankshafts, and other moving engine components.
● Durable Heat Exchange Structure
Manufactured with high-strength aluminum alloy and precision cooling channels, the oil cooler core provides reliable heat dissipation capability and dependable long-term operating durability.
● Suitable for Heavy-Duty Operating Environments
Designed for diesel engines operating under continuous high-load conditions such as construction machinery, transportation vehicles, industrial equipment, and generator applications.
● OEM Standard
Manufactured to meet original equipment specifications for direct replacement.
Technical Specifications
|
Item |
Specification |
|
Item Name |
Oil Cooler Core |
|
Part Number |
3974815 |
|
Application |
Cummins Diesel Engine |
|
Engine Model |
6CT / 6D114 / 6CTA / C8.3 series applications |
|
Type |
Diesel Engine Oil Cooler Assembly |
|
Material |
Aluminum Alloy / Stainless Steel |
|
Installation Position |
Engine Lubrication Cooling System |
|
Function |
Engine Oil Cooling & Heat Exchange |
|
Cooling Type |
Liquid Cooling |
|
Condition |
New |
|
Quality |
OEM Quality Replacement |
|
Packaging |
Neutral Packing / Export Carton |
|
Warranty |
6–12 Months |
|
Place of Origin |
China |
Function
The oil cooler core is a key component of the diesel engine lubrication cooling system.
It transfers heat from the engine lubricating oil to the cooling system, helping maintain stable oil temperature and proper lubrication performance during engine operation.
By reducing excessive oil temperature, the oil cooler core helps protect critical engine components, improve lubrication efficiency, and support stable engine performance under heavy-load working conditions.
In heavy-duty diesel engine applications, a reliable oil cooler contributes to improved engine durability, reduced component wear, and more efficient overall engine operation.
It transfers heat from the engine lubricating oil to the cooling system, helping maintain stable oil temperature and proper lubrication performance during engine operation.
By reducing excessive oil temperature, the oil cooler core helps protect critical engine components, improve lubrication efficiency, and support stable engine performance under heavy-load working conditions.
In heavy-duty diesel engine applications, a reliable oil cooler contributes to improved engine durability, reduced component wear, and more efficient overall engine operation.
Packaging & Delivery
● Standard export carton or customized packaging
● Delivery time: 3–10 days
● Shipping: Sea / Air / Express
● Payment: T/T, L/C, Western Union
● Delivery time: 3–10 days
● Shipping: Sea / Air / Express
● Payment: T/T, L/C, Western Union
FAQ
Q1: What is your terms of packing?
A: Generally, we pack you goods use factory packing box or neutral boxes.
Q2: What is your terms of payment?
A: By TT. We'll show you the photos of the products and packages before you pay the balance.
Q3: How about your delivery time?
A: Generally, it will take 3 to 10 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.
Q4: How do you make a price offer and how long is its validity?
A: We usually quote within 24 hours by email after we get your inquiry . If you are very urgent to get the price,please call us or tell us in your email so that we will regard your inquiry priority. The price valid with 30 days.
Q5: What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost.
Q6: Do you accept third party inspection?
A: Yes, we do.
Q7: Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery.
Q8: How do you make our business long-term and good relationship?
A: 1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them.
Q9: How to guarantee your after-sales service?
A: 1. Strict inspection during production;
2. Strictly check the products before shipment to ensure our packaging in good condition;
3. Track and receive feedback from customer regularly.
A: Generally, we pack you goods use factory packing box or neutral boxes.
Q2: What is your terms of payment?
A: By TT. We'll show you the photos of the products and packages before you pay the balance.
Q3: How about your delivery time?
A: Generally, it will take 3 to 10 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.
Q4: How do you make a price offer and how long is its validity?
A: We usually quote within 24 hours by email after we get your inquiry . If you are very urgent to get the price,please call us or tell us in your email so that we will regard your inquiry priority. The price valid with 30 days.
Q5: What is your sample policy?
A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost.
Q6: Do you accept third party inspection?
A: Yes, we do.
Q7: Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery.
Q8: How do you make our business long-term and good relationship?
A: 1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them.
Q9: How to guarantee your after-sales service?
A: 1. Strict inspection during production;
2. Strictly check the products before shipment to ensure our packaging in good condition;
3. Track and receive feedback from customer regularly.

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Mr. Perry Wu International Sales Director