Basic Info.
Part no. | Cylinder Block 3903920 | Material | Iron |
Type | Cylinder Block | Weight | |
Engine No. | 4B, 4BT 3.9L | Transport Package | Wooden Box |
Trademark | DIRON | Origin | Luoyang City |
HS Code | 84099991 | Production Capacity | 5000PCS/Year |
Product Details
- Item Model:Cylinder Block 3903920
- Date First Listed:2024/12/13
- Manufacturer:Diron Parts
Product Description
- Part Number:Cylinder Block 3903920
- Part Type:Cylinder Block
- Compatible Equipment:4B, 4BT 3.9L Diesel Engine suitable for Cummins

The Cummins Cylinder Block 3903920 is a core component of the Cummins 4BT3.9 diesel engine, known for its robustness and versatility in industrial and automotive applications. This cylinder block is crafted to provide high reliability, durability, and performance, meeting the stringent demands of heavy-duty engines.
Key Features and Specifications:
- Compatibility: This cylinder block is designed specifically for Cummins 4BT3.9 engines, which are widely used in various industries, including construction, agriculture, and transportation.
- Material and Construction: Made from high-quality cast iron, the block offers excellent thermal stability and strength, ensuring long service life and resistance to wear and extreme conditions.
- Precision Engineering: Advanced manufacturing techniques, including CNC machining, ensure tight tolerances and optimized performance for combustion efficiency.
- OEM Standard: The part meets original equipment manufacturer (OEM) specifications, ensuring seamless integration with Cummins engines.
- Versatility: It serves as the foundation for engines used in trucks, generators, marine applications, and industrial machinery.
- Product Details:
- Part Number: 3903920
- Dimensions: OEM standard size
- Condition: New, with a warranty ranging from 1 to 6 months (varies by supplier)
- Production Capacity: Manufactured in large quantities to meet market demand, with a capacity of over 1000 units per month.
Benefits:
- Enhanced Durability: Designed for longevity, reducing the frequency of maintenance and replacement.
- Fuel Efficiency: Precision engineering supports better combustion, leading to improved fuel economy.
- Environmental Compliance: Low-emission designs align with modern environmental standards.
Manufacturer and Warranty:
The part is available from multiple suppliers, such as DIRONPARTS. These manufacturers ensure rigorous quality checks to match Caterpillar standards. Warranty coverage for this part usually extends up to 12 months under normal operating conditions, reflecting its dependability in field use.
FAQ
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Q2. What is your terms of payment?
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Q4. How about your delivery time?
Q5. Can you produce according to the samples?
Q6. What is your sample policy?
Q7. Do you test all your goods before delivery?
Q8: How do you make our business long-term and good relationship?
2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from
ABOUT DIRON
- Factory OF DIRON
Diron Parts Group Have Its Own Factory Ensure That We Offer Better Price For Customers. Besides, Diron Corporate With Some Reliable Principal Manufacturers, So Diron Also Supply Customer Other Quality Spare Parts.








- Team OF DIRON
With 18 years of manufacturing and exporting experience, Diron has a team of knowledgeable engineers, inspectors and technical workers, sales staff, after-sales personnel.


- Products OF DIRON
As a distributor, we supply parts covers for :Complete engines, Long block, Short block, Engine spare parts, Electricla products, Hydraulic products, Transmission products, Undercarridge products.Among them, Cylinder head, Cylinder block, Spacer-plate, Bushing & Pin are our best-selling products.







