• 8-97144-174-0
• 8-97176-727-0
• 8-97176-728-0

Diameter:112 mm

Size:112*115*180-121.7*6 mm

Surface Treatment:Phosphatized

for NQR, NPR, 4HF1 Engine

our cylinder liners are crafted using industry-leading Phosphating (TP) treatment and advanced precision cross-hatching honing technology. Designed to optimize lubrication efficiency, enhance wear resistance, and extend engine service life, these liners are the premier choice for heavy-duty engine overhauls and professional maintenance.

Key Technical Advantages

Advanced Phosphating (TP) Treatment The inner surface undergoes a specialized phosphating process, creating a dense, protective chemical coating. This layer not only prevents oxidation during storage and initial operation but also acts as a superior lubricant carrier. It ensures exceptional lubrication even under extreme cold-start conditions, significantly reducing the risk of cylinder scuffing and seizure.

Ultra-Smooth Precision Finish We utilize high-standard manufacturing processes to ensure an exceptionally smooth inner wall. This superior surface consistency minimizes friction between the piston rings and the cylinder wall, effectively reducing engine noise and maximizing power output.

Optimized Cross-Hatch Honing Through state-of-the-art honing technology, we create a precise, uniform cross-hatch pattern on the inner wall. These microscopic grooves serve as oil reservoirs, maintaining a stable oil film that ensures optimal piston ring sealing, accelerates the break-in process, and provides a perfect balance between power delivery and oil consumption control.

Why choose us?

Our factory has achieved ISO 9001:2015 Quality Management System certification, along with a government-issued Well-known Trademark certification and AAA Credit Rating. We also hold dozens of patents. Our products are sold not only in China but also exported to regions such as Africa, the Middle East, South America, and Asia – where they are well-loved by customers for their reliable quality and highly competitive prices. Additionally, we have an office in a premium high-rise building in Guangzhou and a warehouse of over 2,000 square meters, stocking our best-selling products to ensure fast and convenient delivery.