We use two steps: 1. Insert a medical-grade endoscope through the spark plug hole to visually inspect cylinder wall scratches and carbon buildup on the piston top; 2. Extract an engine oil sample to check for large metal debris or emulsification (caused by coolant leakage).

Our FOB vehicle quotes are typically valid for 72 hours (as domestic retail vehicle sources can be sold at any time); sea freight quotes are valid for 7 to 14 days (depending on shipping line changes). After expiration, prices need to be recalculated based on real-time exchange rates and domestic procurement conditions.

Changes must be requested before the shipping cut-off date (SI Cut-off Date) prior to the vessel's departure. Once the vessel has sailed, the shipping company will charge a high amendment fee, which may also cause delays in customs clearance at the destination port, with costs borne by the buyer.