Product Specifications
| Parameter | Details |
|---|
| Part Name | Cylinder Liner Sleeve |
| Part Number (OEM Reference) | 3904166, DS-3904166, DS-3904166OS, DS3904166OS, DS3904166 |
| Brand Compatibility | Cummins |
| Machine Model Fitment | 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) |
| Condition | New Aftermarket |
| Warranty | 3–12 months against manufacturing defects |
| Packaging | Individual protective sleeve + foam cushioning + reinforced export carton |
Compatible Models
| Brand | Applicable Models |
|---|
| 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) |
Tired of Cylinder Liner Failures on Your Cummins ISB or QSB Engine?
Every unplanned engine shutdown costs operators thousands in lost productivity — especially during critical infrastructure projects or mining operations. Many buyers have installed low-cost liners only to face premature scuffing, coolant leakage, or piston ring failure within weeks. OEM 3904166 liners often require 3–4 week lead times and carry 40% price premiums. Matching the correct liner across dozens of Cummins variants — from B5.9 to QSB6.7 — remains a persistent challenge for fleet managers and repair shops.
OEM-Equivalent Quality, Ready to Ship
This Cummins cylinder liner sleeve 3904166 is manufactured in ISO-certified facilities under strict dimensional and metallurgical control. With 10 years’ experience supplying engine rebuild components globally, XUNPO ensures each liner undergoes bore roundness verification, surface finish inspection, and pressure testing before shipment. It delivers reliable performance in high-load applications such as excavator engine overhauls, generator set maintenance, and marine propulsion systems — where consistent compression sealing and thermal stability are non-negotiable.
Where This Part Works
This Cummins cylinder liner sleeve is routinely deployed in heavy-duty environments: construction sites with continuous duty cycles, quarry operations under abrasive dust conditions, port logistics equipment running 24/7, and agricultural machinery operating in high-humidity climates. In these settings, the liner must maintain precise interference fit, resist corrosion from coolant contamination, and retain hardness under repeated thermal cycling — making accurate specification and material integrity essential. Cummins QSB5.9 cylinder liner sleeve selection directly impacts time between overhauls and total cost of ownership.
Engineering Details That Matter
Each liner is precision-machined from centrifugally cast pearlitic grey iron (ASTM A48 Class 30B), ensuring uniform grain structure and minimal porosity. The inner bore features a plateau-honed surface finish (Ra 0.2–0.4 µm) optimized for rapid piston ring seating and oil retention. Interference fit tolerances are held to ±0.005 mm to guarantee proper heat transfer from piston to coolant jacket. Hardness is controlled at 200–230 HB to balance wear resistance with machinability during honing. All units undergo magnetic particle inspection to eliminate subsurface flaws that could initiate fatigue cracking under sustained load.
The Real Cost of Wrong Parts
A substandard liner may save $15 upfront but risks catastrophic engine damage: warped cylinder heads, scored crankshafts, or cracked blocks requiring full replacement — easily exceeding $3,000 in parts and labor. Industry data shows counterfeit or non-compliant liners reduce service life by 1.5× versus OEM-spec replacements, increasing TCO by 220% over three years. This Cummins 3904166 liner meets ISO 9001 and Cummins internal dimensional standards (drawing 3904166-REV-D), ensuring compatibility with factory pistons, rings, and head gaskets. Choosing verified aftermarket isn’t about compromise — it’s about predictable uptime and lower total cost of ownership.
Why Customers Trust XUNPO
We partner exclusively with ISO 9001-certified factories and perform incoming material inspection on every batch. Each liner undergoes pre-shipment performance validation including bore geometry check, surface roughness measurement, and interference fit simulation. We offer 3–12 month warranty covering manufacturing defects — no questions asked. With 10 years exporting to 120+ countries, our technical team has verified over 45,000 part-to-machine matches. Our Guangzhou warehouse holds 10,000+ engine SKUs in stock, and we respond to part verification requests within 2 hours. Standard MOQ is just 1 piece — because urgent repairs can’t wait.
Packaging & Shipping
- Individually wrapped in anti-rust paper, secured in custom foam insert, packed in double-walled corrugated export carton
- In-stock items ship within 2–5 working days after payment confirmation
- Flexible logistics: DHL/FedEx/UPS express (3–7 days), air freight (7–12 days), or sea freight (25–40 days)
- Real-time tracking provided from warehouse dispatch to final delivery
- Minimum order quantity: 1 piece — supporting emergency field repairs and sample evaluation
Get Your Cummins 3904166 Liner Sleeve Now
Your engine shouldn’t sit idle waiting for parts. Send us your machine model, quantity, and destination — we’ll deliver a competitive quote within 24 hours. First-time customers may request a sample for bench testing before bulk order. With ready stock in Guangzhou and direct access to certified production lines, we help you resume operation faster and more reliably than OEM channels.
Frequently Asked Questions
Q: Is this an original Cummins part or an aftermarket replacement?
A: This is an OEM-equivalent aftermarket cylinder liner sleeve, produced in ISO 9001-certified facilities to match Cummins 3904166 dimensional, material, and performance specifications.
Q: How do I confirm this liner fits my specific Cummins engine?
A: Provide your exact engine model (e.g., QSB6.7 CM2250) and serial number if available — our technical team will verify compatibility and reply within 2 hours.
Q: What is your warranty policy on this liner?
A: We offer 3–12 months warranty against manufacturing defects. If failure is confirmed due to material or workmanship, we replace free of charge.
Q: What is the minimum order quantity?
A: MOQ is 1 piece. No exceptions — designed for urgent maintenance and small-batch rebuilds.
Q: How soon can I receive the liner after placing an order?
A: In-stock items ship within 2–5 working days. Express courier options (DHL/FedEx) deliver to most destinations in 3–7 days.
Q: Can I request a sample before placing a bulk order?
A: Yes. First-time customers may request one sample unit for physical and functional testing prior to bulk purchase.
Ready to order or need a quote?
Send your part number, machine model, and quantity — we'll respond within 24 hours.
WhatsApp: +86 187 2205 7128 | Email: talos@xunpojx.com
