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Wenzhou COC Auto Parts Co., Ltd. – A trusted global manufacturer of high-performance engine bearings, pistons, piston rings, and bushings since 1977. Delivering OEM-quality components to markets worldwide.
Wenzhou COC Auto Parts Co., Ltd. has been a leading manufacturer in the engine components industry for over 38 years. Originally established as Olian Industry & Trading Company, we have evolved into a globally recognized supplier of precision-engineered auto parts.
As a member of the National Internal Combustion Standardization Committee and a certified OEM supplier in China, we uphold the highest standards in product development, quality control, and manufacturing excellence.
High-performance engine components built for reliability, efficiency, and longevity. Designed for OEM and aftermarket applications across global markets.
High-load capacity bearings for diesel and gasoline engines. Precision-machined for optimal fit and extended service life.
Multi-layer coated piston rings with superior sealing, heat resistance, and wear protection for heavy-duty applications.
Forged and cast aluminum pistons with optimized skirt profiles and thermal expansion control for high-efficiency engines.
Self-lubricating and maintenance-free bushings for engine mounts, suspension, and drivetrain systems.
High-strength bi-metal and tri-metal bearings designed for extreme pressure and fatigue resistance.
Precision-ground main and rod bearings for smooth rotation and reduced friction in high-RPM engines.
Durable wet and dry liners with honed surfaces for optimal piston ring sealing and heat dissipation.
Complete rebuild kits including pistons, rings, bearings, and gaskets for full engine restoration.
Engineered for performance, reliability, and global compliance.
Certified supplier to China OEM market and member of the National Internal Combustion Standardization Committee.
Over three decades of continuous innovation and manufacturing excellence in engine component technology.
Established export division since 2009, serving customers across Asia, Europe, Africa, and the Americas.
We use high-grade bi-metal and tri-metal alloys including steel-backed bronze and aluminum-tin composites for superior load distribution and wear resistance.
Yes, our piston rings are engineered to withstand high temperatures and pressures typical in turbocharged and high-performance engines.
Yes, we support OEM/ODM services and can produce custom engine components based on technical drawings and specifications.
We comply with national internal combustion standards and follow strict in-house quality control protocols at every stage of production.
For inquiries, quotations, or technical support, visit our official website to connect with our team.
Company: WENZHOU COC AUTO PARTS CO.,LTD.
Address: No.25 Pingsong Middle Road, Wanquang Town, Pingyang County, Wenzhou City, Zhejiang, China
Email: [email protected]
QQ: 1097957358
Phone: +86-577-63701373
Fax: +86-577-63701373
ICP: 09018039
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