
Product Overview
This premium cylinder liner kit is engineered for Caterpillar B3.3 and 4D95 series industrial and marine engines. As a leading global supplier, we provide reliable OEM-quality engine components to major markets worldwide, including North America, Europe, the Asia-Pacific region, and the Middle East. Our products are designed to meet the rigorous demands of heavy-duty applications, ensuring optimal engine performance and longevity.
Key Features & Benefits
- Premium Material Construction: Manufactured from high-grade cast iron alloy for superior wear resistance, thermal stability, and excellent heat dissipation.
- Precision Engineering: Machined to exact OEM tolerances to ensure a perfect fit, proper piston ring seal, and optimal oil control.
- Enhanced Durability: Advanced surface treatments and honing patterns reduce friction and minimize bore polishing, extending the service life of both the liner and the piston assembly.
- Reliable Performance: Restores engine compression and power output, reduces oil consumption, and prevents coolant contamination for dependable operation.
- Global Compliance: Produced to meet international quality standards, suitable for cross-border trade and replacement in global fleets.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Type | Cylinder Liner / Sleeve |
| Primary Part Number | 6207-21-2110, 6207-21-2120, 6207-21-2121 |
| Compatible Engine Models | Caterpillar B3.3, 4D95, S4D95, 6D95, S6D95 |
| Material | High-Grade Cast Iron Alloy |
| Surface Finish | Precision Honed |
| Application | Industrial, Marine, Generator Set Engines |
OEM Cross-Reference
This cylinder liner directly replaces the following OEM and alternative part numbers:
- Caterpillar: 6207-21-2110, 6207-21-2120, 6207-21-2121
- Common Alternate Numbers: C6207212110, C6207212120, C6207212121
Always verify the specific part number from your engine’s service documentation or the old component prior to ordering.
Compatibility
This liner is designed for use in the following Caterpillar engine families, commonly found in a variety of industrial and marine equipment:
- Engine Models: B3.3, 4D95, S4D95, 6D95, S6D95
- Typical Applications: Industrial power units, generator sets, marine auxiliary engines, and pump drives.
- Note: Compatibility is based on the engine model and specific configuration. Please confirm your engine’s serial number or exact part requirement for guaranteed fitment.
Global Supply & Distribution
We specialize in the international distribution of critical engine components. Our streamlined logistics network ensures efficient delivery to key industrial hubs and ports globally.
- Worldwide Shipping: We export to all major continents, with consolidated container and air freight options available.
- Major Markets Served: We have established supply chains to North America (USA, Canada, Mexico), Europe (UK, Germany, Netherlands), Asia-Pacific (Australia, Singapore, Japan), and the Middle East (UAE, Saudi Arabia).
- Fast Delivery: Stock availability for prompt shipment to major logistical centers like Rotterdam, Los Angeles, Singapore, and Jebel Ali.
- Export Expertise: All documentation (Commercial Invoice, Packing List, Certificate of Origin) is provided for smooth customs clearance in compliance with international trade regulations.
Quality Assurance
We are committed to supplying components that meet the highest standards of performance and reliability.
- Manufacturing Standards: Produced using ISO-certified processes with strict quality control at every stage, from casting to final inspection.
- Rigorous Testing: Each liner undergoes dimensional accuracy checks, surface finish analysis, and material hardness testing to ensure it meets OEM specifications.
- Warranty: Backed by a comprehensive warranty against manufacturing defects, providing peace of mind for our B2B clients and engine rebuild shops.
FAQ
Q1: How do I confirm this is the correct cylinder liner for my Caterpillar engine?
A1: The most reliable method is to match the part number stamped on your old cylinder liner or listed in your engine’s official service parts manual with the numbers provided in our OEM Cross-Reference section. Providing your engine model and serial number to our technical team can also assist in verification.
Q2: Are these liners sold individually or as a full set?
A2> We typically supply cylinder liners individually, allowing you to purchase the exact quantity needed for your rebuild project—whether for a single cylinder repair or a complete engine overhaul. Please specify your required quantity when inquiring or ordering.
Q3: What are the critical installation steps to ensure proper performance?
A3> Proper installation is crucial. Key steps include: thoroughly cleaning the engine block counterbore, checking liner protrusion above the block deck using a dial gauge to ensure it is within specification, and following the manufacturer’s recommended procedure for sealing (if required) and torque sequences. Always use a professional cylinder hone to achieve the correct final bore finish and cross-hatch pattern for optimal ring seating.
Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.
2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.
3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.
4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.
5. Scientific ERP system, easy and fast to locate the parts that customer needs.
6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.
Exhibition

Packing&Shipping

1. Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).
2. Once we get confirmation of payment, we will ship products in 2 days.
3. Our packaging is standard export wooden box or others as your requirement.
4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ
Q1. What is your company major products?
A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.
Q2.What is the MOQ?
A: Normally we can supply any quantity if we have in stock.
Q3. What is your payment term ?
A: We accept Western Union, T/T, Paypal.
Q4. What is the packing ?
A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.
Q5. When can you deliver products after payment ?
A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .
Q6. What can you do to complete order perfectly ?
A: In the beginning , We will communicate with clients in details to understand what they need .
Before packing , We will check the products and send photos to clients .After confirmation ,
We will packing products well to avoid damage . Once we get tracking number ,
We will send it to customer and keep contact in with clients .