490QZLB Cylinder Liner Kit for China Engine Repair – Construction, Agriculture, Marine

Product Details

Product Overview

This 490QZLB Cylinder Liner Kit is a precision-engineered replacement component designed for a wide range of Chinese diesel engines. Manufactured by, this kit is ideal for engine repair and overhaul applications in demanding sectors such as construction, agriculture, industrial machinery, gensets, marine, and material handling equipment. The kit includes all necessary components to restore cylinder compression and oil control, ensuring reliable engine performance.

Built to OEM specifications, this cylinder liner kit offers a direct fit for engines requiring the 490QZLB model designation. It is a critical part for rebuilding engines that have experienced wear, scoring, or loss of compression. While primarily used in Chinese-manufactured equipment, it may also be compatible with certain international engine platforms using similar bore and stroke configurations. Always verify your engine model and serial number for perfect compatibility.

This product is sourced from Guangdong, China, and is available as either made-in-China aftermarket parts or genuine components. The kit is rigorously tested to meet the demands of continuous heavy-duty operation, making it a cost-effective and reliable solution for fleet maintenance and repair shops worldwide.

Key Features & Benefits

• Precision Fit: Manufactured to original equipment (OEM) size specifications, ensuring accurate installation and minimal break-in time.
• Durable Construction: Made from high-strength cast iron with advanced wear resistance, extending service life in high-temperature, high-pressure diesel environments.
• Complete Kit: Includes all necessary cylinder liners, pistons, piston rings, and pins (as applicable) for a full cylinder rebuild, reducing parts sourcing time.
• Enhanced Oil Control: Premium piston ring design reduces oil consumption and blow-by, improving overall engine efficiency and emission compliance.
• Versatile Application: Suitable for multiple engine types across construction, agriculture, marine, genset, and material handling equipment.
• Rigorous Testing: Every batch undergoes machinery test report verification and video outgoing inspection to ensure dimensional accuracy and performance.
• Global Logistics: Packed securely in plastic bags, boxes, and cartons for safe international shipping to major ports and industrial centers.

Technical Specifications

OEM Cross-Reference

This 490QZLB Cylinder Liner Kit is a direct replacement for the following OEM and aftermarket part numbers. Please cross-reference with your original part to ensure correct fitment.

• 490QZLB (Primary Part Number)
• Alternative: 490QB / 490QC Series Liner Kits (Verify dimensions)
• Compatible with: 490, 495, 4100, 4102 Series China Diesel Engines (where bore/stroke matches)

Note: This kit is specifically designed for the 490QZLB engine model. For other 490 variants, please confirm cylinder bore diameter and piston pin height before purchase.

Compatibility

This cylinder liner kit is commonly used for the following engine models and equipment types. Fitment is inferred based on standard OEM specifications for the 490QZLB engine.

• Engine Models: 490QZLB, 490QZL, 490B, 490G, 490D (China-built diesel engines)
• Vehicle/Equipment Applications:
  • Construction: Small excavators, loaders, road rollers (e.g., XCMG, Liugong, SANY)
  • Agriculture: Tractors, harvesters, rice transplanters (e.g., Dongfeng, YTO, Lovol)
  • Industrial: Forklifts, generators, water pumps, compressors
  • Marine: Small fishing vessels, auxiliary engines, generator sets
  • Material Handling: Forklifts, telehandlers, warehouse equipment

Important: Always verify your engine serial number and cylinder dimensions before ordering. This kit is for the 490QZLB turbocharged model; non-turbo 490 engines may require different components.

Global Supply & Distribution

We offer worldwide shipping to all major markets, including North America, Europe, Asia-Pacific, the Middle East, Africa, and South America. Our logistics network ensures fast and reliable delivery to major ports such as Shanghai, Shenzhen, Rotterdam, Los Angeles, and Dubai.

With extensive export experience, we comply with international trade standards and can provide necessary documentation for customs clearance. Whether you need air freight for urgent repairs or sea freight for bulk orders, we can accommodate your shipping requirements. We also offer drop-shipping services for B2B partners.

Quality Assurance

cylinder liner kits are manufactured under strict quality control procedures in ISO-certified facilities. Each kit undergoes the following quality checks:

• Dimensional Inspection: All components are measured for bore diameter, roundness, and surface finish to ensure OEM tolerances.
• Material Analysis: Cast iron composition is verified for hardness and wear resistance.
• Pressure Testing: Liners are tested for leaks and structural integrity under high compression.
• Video Outgoing Inspection: A video record of the final inspection is provided upon request, giving you visual confirmation of quality.
• 6-Month Warranty: We warrant against manufacturing defects in materials and workmanship for six months from the date of purchase.

FAQ

Q1: How do I confirm this 490QZLB cylinder liner kit fits my engine?
A: The 490QZLB is a specific turbocharged variant of the 490 series. To confirm fitment, check your engine’s model number (stamped on the engine block or nameplate). Measure the cylinder bore diameter (standard is typically 90mm) and the piston pin height. If your engine is a 490QZL (non-turbo) or 490Q (natural aspirated), please verify dimensions as piston design may differ. We recommend comparing your old liner and piston kit against our specifications before ordering.

Q2: What is included in the “Cylinder Liner Kit”?
A: The kit typically includes: cylinder liners (sleeves), pistons, piston rings, piston pins, and circlips. Some kits may also include cylinder head gaskets or O-rings. Please check the product listing or contact our sales team for a detailed packing list. All components are matched to the 490QZLB engine specifications for balanced performance.

Q3: How should I install and maintain this kit for best performance?
A: Installation should be performed by a qualified diesel mechanic. Key steps include: cleaning the cylinder block bores, applying proper lubrication to liners and rings, using a ring compressor for piston installation, and torquing all bolts to manufacturer specifications. After installation, follow a proper break-in procedure (varying engine load for the first 50 hours) and change the oil and filter at the recommended interval. Regular maintenance, including checking compression and oil consumption, will maximize the kit’s lifespan.