
Part Name: 8S3970 Chamber
Part Number: 8S3970
Basic Info.
Part no. | 8S3970 | Material | steel |
Type | Precombustion Chamber | Part Type | Engine Parts |
Compatibility | Caterpillar | Transport Package | Wooden box |
Trademark | DIRON | Origin | Luoyang City |
HS Code | 84099991 | Production Capacity | 5000PCS/Year |
Product Details
- Item Model:8S3970
- Date First Listed:2025/03/28
- Manufacturer:Diron Parts
Product Description
- Part Number: 8S3970
- Part Type:Precombustion Chamber
- Description: for Caterpillar

Product Introduction: 8S3970 Chamber for Caterpillar Engines
Overview
The 8S3970 Chamber is a high-quality pre-combustion chamber assembly engineered for use in Caterpillar diesel engines, notably the 3304 and 3306 series. This component plays a critical role in the combustion process, ensuring efficient fuel ignition and optimal engine performance. Available as a new aftermarket or remanufactured part, it offers a reliable and cost-effective solution for maintaining or restoring the functionality of Caterpillar equipment in industrial, construction, and heavy-duty applications.
Key Features
- Material: Crafted from durable, heat-resistant materials (typically high-grade steel or alloy), designed to withstand extreme temperatures and pressures within the engine.
- Design: Features a precision-engineered pre-combustion chamber that facilitates the initial ignition of fuel, enhancing combustion efficiency in indirect injection systems.
- Compatibility: Directly compatible with Caterpillar 3304 and 3306 engines (including variants like 3304PC, 3306DI), with cross-referenced part numbers such as 8S-3970, 5S6795, 7S7142, 8S3990, and 2423438.
- Quality Assurance: Manufactured or remanufactured to meet or exceed OEM standards, often tested for durability, fitment, and performance under rigorous conditions.
- Weight: Approximately 1.13 kg (2.6 lbs), ensuring a robust yet manageable component.
Benefits
- Improved Combustion: Enhances fuel ignition and burn efficiency, leading to better engine power output and reduced emissions.
- Durability: Built to endure the harsh conditions of heavy-duty operation, extending the service life of the engine.
- Cost-Effective: Provides a high-quality alternative to OEM parts, offering significant savings without compromising reliability.
- Seamless Integration: Designed as a direct replacement, ensuring easy installation and compatibility with existing engine components.
Applications
The 8S3970 Chamber is tailored for a wide range of Caterpillar equipment powered by 3304 and 3306 engines, including:
- Excavators: 225 series.
- Wheel Loaders: 950, 966C, 980B.
- Track Loaders: 955K, 955L, 977K, 977L.
- Track-Type Tractors: D6C, D6D, D7F, D7G.
- Motor Graders: 120G, 130G, 140B, 14G.
- Other: Wheel dozers (814), skidders (528), truck engines (1673C), and marine or industrial power units. Its versatility makes it an essential component for maintaining equipment in construction, mining, and industrial settings.
Technical Specifications
- Part Number: 8S3970 (cross-references: 5S6795, 7S7142, 8S3990, 2423438, 3256042).
- Engine Compatibility: Caterpillar 3304 (pre-combustion) and 3306 (direct injection and pre-combustion variants).
- Condition: Available as new aftermarket or remanufactured; often sold individually or in kits with gaskets (e.g., 7S-3206, 5M2667, 2S8959, 2S8960).
- Dimensions: Approximately 6.1 x 2.6 x 2.6 inches (15.5 x 6.6 x 6.6 cm).
- Warranty: Typically backed by a 6-month to 1-year warranty, depending on the supplier.
NOTE: While this description provides general information about 8S3970 Chamber, specific details such as size, weight and exact material may vary by manufacturer and specific application. To obtain the most accurate and up-to-date information, it is recommended to consult a qualified parts supplier such as DIRON PARTS.
FAQ
Q1. What is your terms of packing?
A: Generally, we pack our goods in neutral white boxes and brown cartons. If you have legally registered patent, we can pack the goods in your branded boxes after getting your authorization letters.
Q2. What is your terms of payment?
A: T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages before you pay the balance.
Q3. What is your terms of delivery?
A: FOB
Q4. How about your delivery time?
A: Generally, it will take 20 to 30 days after receiving your advance payment. The specific delivery time depends on the items and the quantity of your order.
Q5. Can you produce according to the samples?
A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.
Q6. 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.
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, 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.







