The core of identifying fake and inferior diesel engines lies in systematically verifying key identification, process details, and supporting documents. The following are key points summarized based on industry standards and search results:
1、 Verify the consistency of core numbers
Three major number verification
Nameplate Number: Check if the body nameplate printing is clear and if the information is complete (including model, power, manufacturer, etc.)
Machine body number: Search for the convex body steel seal number on the flywheel end machining plane (consistent with the nameplate)
Oil pump nameplate number: Verify the independent nameplate information of the oil pump to ensure it has not been tampered with
Operation suggestion: Call the manufacturer’s customer service to verify the authenticity of the three major numbers and avoid using counterfeit machines.
Anti counterfeiting identification verification
Scrape off the anti-counterfeiting coating and scan the QR code, and verify through official channels (such as Cummins supporting WeChat scanning for authenticity verification)
Check for laser holographic labels and fluorescent anti-counterfeiting marks (red brand logo visible under UV light irradiation)
2、 Appearance and process inspection
Body identification and craftsmanship
LOGO consistency: Compare the body brand logo with the official website standard pattern (such as Changchai using the Red Sun logo)
Welding and spraying: The welding points of the original machine are uniform, and the paint in the dead corners is smooth; Refurbished machines often have paint color differences or residual stains
Key component materials
Check if the accessories such as filters and oil pipes are original factory configurations (inferior filter elements have no filtering effect)
Observe whether the radiator area meets the standard. Poor quality water tanks can easily cause overheating of the unit
3、 Document and supporting verification
Complete accompanying documents
Must include: factory certificate of conformity (including anti-counterfeiting code available in the manufacturer’s database), operation manual, warranty card
Check if the data on the certificate of conformity matches the parameters on the nameplate completely
Trap of supporting materials
Be wary of confusion with “similar factory names” (such as “Weifang XX” impersonating “Weichai Co., Ltd.”)
Missing global service network manuals or parts catalogs are mostly counterfeit
4、 Auxiliary identification methods
Oil and operational testing
Engine oil identification: Genuine engine oil is clear and transparent, with a light odor; Poor quality oil is cloudy with impurities and prone to solidification at low temperatures
Abnormal test run: The fake and inferior machine experiences significant vibration and abnormal noise during operation, and is prone to stalling due to insufficient power
