The mechanical part generally includes a set of intake and exhaust valves, a set of piston rings, a set of 4 cylinder liners (if it is a 4-cylinder engine), two thrust plates, and 4 pistons; the cooling system generally includes a water pump (The pump blades are corroded or the water seal has water seepage), the upper and lower water pipes of the engine, the large circulation iron water pipe, the small circulation rubber pipe, and the throttle valve water pipe (must be replaced if there is aging and swelling); the fuel part generally includes the upper and lower oil rings of the fuel injectors , gasoline filter; ignition part: if there is swelling in the high-voltage line or leakage, replace it, the fire piston;
The part near the air generally mainly includes the air filter; other auxiliary materials generally mainly include antifreeze, engine oil, oil grid, chemical cleaner, engine metal cleaner or all-purpose water; the parts to be inspected generally mainly include whether the cylinder head is corroded or uneven, Crankshaft, camshaft, timing belt tensioner, timing belt adjustment pulley, timing belt, external engine belt and adjustment pulley, rocker arm or rocker shaft, if it is a hydraulic lifter, add more detection hydraulic lifters;