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- Wanda Plaza, Jinan, Shandong, China
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Power your engine with the most reliable DONGFENG TRUCK PARTS engineering — the premium liner dongfeng series. Designed for extreme duty cycles, this wet-type cylinder liner guarantees exceptional wear resistance, superior heat dissipation, and perfect piston compatibility. Whether you operate heavy haulers, construction trucks, or agricultural machinery, the genuine liner dongfeng reduces friction loss by 18% while boosting compression sealing. Engineered with centrifugally cast high-alloy iron, it outlasts conventional liners by over 120,000 km under full load.
The cylinder liner is the heart of any diesel engine — it directly influences oil consumption, blow-by, and overhaul intervals. The genuine liner dongfeng is manufactured using the latest centrifugal casting technology, resulting in a dense, uniform microstructure with exceptional hardness (220–280 HB). Each liner undergoes rigorous ultrasonic testing to eliminate porosity and ensure zero internal defects. Fleet operators choose Dongfeng genuine liners because they maintain roundness below 0.02mm even after 800,000 km, drastically reducing the risk of piston seizure.
Unlike generic alternatives, the liner dongfeng features a specialized anti-polishing ring groove design that prevents carbon build-up at the top land, preserving oil control ring efficiency. The external O-ring grooves are precisely cut to accept high-temperature Viton® seals, delivering leak-proof coolant sealing. Additionally, the finish honing plateau surface (Ra 0.25–0.45µm) enables immediate ring seating, shortening break-in time by 40%.
Boron-alloyed cast iron delivers 420 MPa tensile strength, resisting cavitation erosion even under high cylinder pressure (180 bar+).
Optimized alloy composition ensures 20% better heat transfer compared to standard liners, reducing piston ring groove temperature by 25°C.
Special chromium-enriched matrix protects against pitting caused by coolant vibration — tested to 3000h without cavitation signs.
Cylindricity ≤ 0.008 mm, ensuring uniform oil film thickness and minimized blow-by from day one.
Molybdenum-based flash coating available for extreme-duty applications, boosting scuff resistance by 70%.
Designed to meet modern emission standards by reducing oil consumption below 0.05% of fuel consumption.
| Part Numbers Compatibility | DZ90149350110, 1302010-KD100, 6102.07.01, 6BT-1302010, 4BTA-1302010 |
|---|---|
| Liner Type | Wet type, removable, with O-ring grooves |
| Material | High-alloy centrifugally cast iron (B, Cu, Cr, Mo alloy) |
| Bore Diameter (Standard) | 102 mm / 110 mm / 125 mm (depending on engine series) |
| Outside Diameter | 118 mm – 142 mm (precision machined) |
| Flange Height | 12.5 mm ± 0.05 mm |
| Hardness | HB 240–280 (consistent across cross-section) |
| Surface Finish (Ra) | 0.25–0.45 µm (plateau honed) |
| Wall Thickness | 6.5 mm – 8.5 mm (engine-specific) |
| Applicable Engines | Dongfeng Cummins 6BT/6CT, ISDe 4.5/6.7, Yuchai YC6J, DCEC L-series, Dongfeng EQ140/153/天龙 |
| Seal Grooves | 2 or 3 nitrile/Viton grooves, 100% leak tested |
| Certification | IATF 16949, ISO 9001:2024, OEM traceability |
Genuine liners allow up to 800,000 km between in-frame overhauls, lowering total ownership cost.
Superior roundness and finish cut oil consumption by 35% compared to worn liners, meeting strict emission rules.
Proven performance in both arctic cold (-40°C) and desert heat, with no distortion or cracking.
Manufactured with original tooling, each liner is 100% interchangeable with genuine Dongfeng factory parts.
Dongfeng KL,天龙, Volvo-licensed platforms benefit from non-stop reliability.
Dongfeng-powered tractors & harvesters get robust cylinder protection under dusty fields.
High-corrosion resistance version available for marine diesel engines.
City buses & coaches see smoother operation and lower emissions.
Each liner dongfeng is manufactured in ISO 9001 & IATF 16949 certified facilities, with 100% dimensional laser scanning and pressure testing. The centrifugally cast process ensures a defect-free structure with uniform grain flow, eliminating any risk of micro-cracks. Furthermore, advanced honing machines create a plateau finish that reduces friction by 22% compared to standard cylinder liners, directly improving fuel economy by up to 2.5% in heavy-duty cycles.
To maximize the lifespan of your liner dongfeng, always follow these best practices: soak new liners in clean engine oil before installation, apply approved sealant to the flange seat, and use a liner puller to avoid distorting the flange. Measure protrusion above the block (0.03–0.10 mm) with a dial gauge; incorrect height leads to head gasket failure. Replace O-rings with genuine parts and torque cylinder head bolts in three stages per workshop manual. After assembly, perform a cold leak test and gradually warm up the engine before full load operation.
Regular maintenance: check coolant additive levels (SCA) to prevent cavitation, and inspect liners for scuff marks during overhauls. The genuine liner dongfeng is engineered to handle high-sulphur fuels and EGR systems without corrosive degradation, making it the ideal choice for modern and legacy Dongfeng engines alike.
Real-world field tests conducted across 150 fleets in Southeast Asia, Africa, and South America showed that liner dongfeng delivers 38% lower cylinder wear rate after 500,000 km compared to generic liners. Oil consumption remained stable at 0.08 g/kWh, while non-genuine liners exceeded 0.2 g/kWh after 300,000 km. Moreover, the genuine liner’s superior cavitation resistance eliminated premature liner pitting, reducing coolant leakage complaints by 94%.
Certified durability summary: average life exceeding 1.2 million kilometers under standard duty; cylinder roundness retention within 0.025mm after 8000h operation. The liner dongfeng is the ultimate choice for owners seeking maximum engine protection and lowest life-cycle cost.
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