Minimize equipment downtime with our precision-engineered Cylinder Liner Sleeve 3904166 for Cummins engines—direct replacement for 4B3.9, 6B5.9, ISB, and QSB series that maintains OEM-equivalent performance at a fraction of the cost. Crafted to exact tolerances with ISO-certified materials, this sleeve ensures optimal heat dissipation and piston sealing, preventing costly leaks and extending engine life.
| Parameter | Details |
|---|---|
| Part Name | Cylinder Liner Sleeve |
| Replacement Part Number | 3904166, DS-3904166, DS-3904166OS, DS3904166OS, DS3904166 |
| Compatible Engine Brand | Cummins |
| Condition | New Aftermarket |
| Quality Assurance | ISO-certified manufacturing, pre-shipment performance testing |
| Warranty | 3-12 months against manufacturing defects |
| Brand | Applicable Engine Series |
|---|---|
| Cummins | 4B3.9, 6B5.9, B3.3, B3.9-V110, B5.9 G, B5.9 GAS PLUS CM556, B5.9 LPG PLUS CM556, B5.9-C, B5.9-M330, G5.9, G5.9 CM558, ISB, ISB CM2150, ISB CM550, ISB CM850, ISB5.9G CM2180, ISB6.7 CM2250, ISB6.7 CM2350 B101, ISBE CM800, ISBE4 CM850, QSB3.9 30 CM550, QSB4.5 30 CM550, QSB4.5 CM850(CM2850), QSB5.9 30 CM550, QSB5.9 44 CM550, QSB5.9 CM550, QSB5.9 CM850, QSB5.9480H0, QSB5.9G, QSB6.7 CM2250, QSB6.7 CM850(CM2850) |
When your Cummins 4B3.9 or 6B5.9 engine is down, every hour of downtime costs money—whether it's a construction site waiting for machinery or a fleet stuck in the yard. Many repair shops face the same frustration: OEM parts take 2-4 weeks to arrive and cost 30-50% more, while cheap counterfeit sleeves fail after half the expected lifespan, causing repeated breakdowns and unplanned repairs.
Our Cylinder Liner Sleeve 3904166 solves these problems with ISO-certified manufacturing and 10 years of export experience backing every unit. As a professional supplier with 20+ industry experts, we ensure each sleeve meets OEM specifications through rigorous incoming material inspections and pre-shipment performance testing. With over 10,000 SKUs in stock at our Guangzhou warehouse, we can ship this Cummins cylinder liner within 2-5 working days—no more waiting weeks for critical parts.
This cylinder liner sleeve is designed for high-stress applications in construction, mining, and industrial machinery powered by Cummins 4B3.9, 6B5.9, ISB, and QSB series engines. It withstands extreme temperatures and pressure cycles in excavators, loaders, and generators, making it essential for maintaining engine compression and preventing coolant leaks. Whether your equipment operates in dusty quarries or humid port environments, this sleeve delivers consistent performance under demanding conditions.
Precision matters when replacing cylinder liners. Our 3904166 sleeve features tight dimensional tolerances to ensure proper fit with piston assemblies and cylinder blocks, eliminating oil leakage and compression loss. The high-strength material resists wear from piston movement, extending service life compared to inferior alternatives. Each sleeve undergoes strict quality control—from raw material selection to final machining—to match the durability of original Cummins components. This attention to detail ensures your engine runs smoothly and reduces the risk of premature failures.
Opting for cheap, uncertified cylinder liners may save money upfront, but the hidden costs add up quickly. A single failure can cause piston damage, coolant contamination, and 48+ hours of downtime—easily costing $5,000+ in lost productivity. Our ISO-certified Cummins 3904166 sleeve avoids these issues by meeting OEM-equivalent standards, reducing total cost of ownership through longer service intervals and fewer repairs. With a 3-12 month warranty, you’re protected against manufacturing defects, giving you confidence in every purchase.
We’ve earned the trust of 120+ countries by focusing on reliability and service: We partner only with ISO-certified factories and enforce strict quality control at every stage. Our technical team verifies part compatibility within 2 hours, ensuring you get the right component the first time. With 10 years of global export experience, we understand the challenges of cross-border logistics and offer flexible shipping options—express, air, or sea—to meet your timeline. Plus, our 24/7 customer support means you can get help whenever you need it, whether you’re in North America, Europe, or Southeast Asia.
Don’t let a faulty cylinder liner keep your equipment offline. Send us your part number, engine model, and quantity today, and we’ll provide a competitive quote within 24 hours. First-time clients can request sample testing to verify quality before bulk orders. With our ready stock and fast shipping, you can get your Cummins engine back to work quickly—because every day your machinery is operational is a day you’re generating revenue.
Q: Is this an OEM part or aftermarket replacement?
A: This is an OEM-equivalent aftermarket cylinder liner, manufactured by ISO-certified factories to meet original Cummins specifications.
Q: How can I confirm this liner fits my Cummins engine?
A: Provide your engine model and serial number, and our technical team will verify compatibility within 2 hours.
Q: What warranty coverage do you offer?
A: We provide a 3-12 month warranty against manufacturing defects. If the part fails due to material or workmanship issues, we’ll replace it free of charge.
Q: What is the minimum order quantity?
A: We accept orders for 1 piece, making it easy to source single parts for emergency repairs.
Q: How long does shipping take?
A: In-stock items ship within 2-5 working days. Express shipping takes 3-5 days globally, while air freight and sea freight options are available for larger orders.
Q: Can I request a sample before placing a bulk order?
A: Yes, first-time clients can request sample testing to evaluate quality and compatibility before committing to larger purchases.
Not sure if this part fits your machine? Send us your machine model number and serial number via WhatsApp or email -- our specialists will verify compatibility within 2 hours.
Fill in your details and we'll respond within 24 hours with a competitive quote.
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