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).

We maintain an absolute skeptical attitude. In addition to regular visual inspections, we focus on checking for sediment accumulation around the sunroof drainage channels and look for water stains under the A-pillar trim and front floor mats. This is the only effective physical evidence to determine if the sunroof drainage holes are blocked, leading to hidden leaks.

Our responsibility ends with delivering the vehicle to the Russian border or Far East port and providing the legal Chinese export documents. The payment of Scrap Tax, application for SBKTS (Vehicle Structure Safety Certificate), and activation of the final e-PTS electronic passport must be fully handled by the Russian buyer and their local customs broker.