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Engine overhaul project content

2023-02-06

Automobile engine overhaul mainly includes replacing valves, pistons, cylinder liners, or boring cylinders, grinding shafts, etc. According to the standard of general 4S shops, all 4 sets need to be replaced, that is, pistons, piston rings, valves, valve oil seals, valve guides, crankshaft bearings, connecting rod bearings, timing belts, and tensioners. The overhaul project generally includes overhauling the engine, machining the cylinder head plane, boring the cylinder, clearing the water tank, grinding the valve, inserting the cylinder liner, pressing the piston, cleaning the oil circuit, maintaining the motor, maintaining the generator, etc.
 
The engine overhaul mainly includes the following parts: replacement of the timing chain, tensioner, in addition to machining, the lower sleeve of the boring cylinder, the grinding shaft, the cold pressure conduit, and the replacement of the overhaul kit, the cranked front oil seal, the cranked rear oil seal, Camshaft oil seals, oil pumps, valves, etc., and sometimes external parts need to be replaced, such as clutch discs, etc. In short, it is necessary to replace all the parts that are not sure to repair the engine to ensure the performance of the engine .
2. The mechanical part generally includes a set of valve intake and exhaust, a set of piston rings, a set of 4 cylinder liners (if it is a 4-cylinder engine), two thrust plates, and 4 pistons;
3. The cooling system generally includes the 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 hose, the throttle water pipe (must be replaced if it is aging and swollen), the temperature control device, etc.;
The fuel part generally includes the upper and lower oil rings of the fuel injector, gasoline filter; the ignition part: replace the high-voltage line if there is swelling or leakage, fire piston; the upper and lower oil rings of the fuel injector, gasoline filter;
 
4. Ignition part: Replace the high-voltage line if there is swelling or leakage, and the fire piston;
 
Materials needed for engine overhaul
 
1. Valve oil seal package, one set of valve intake and exhaust, one set of plug ring, one set of cylinder liner, 4 push pieces, two push pieces, large and small tiles, 4 plugs,
 
2. The cooling system generally mainly includes the water pump (the pump blade is corroded or the water seal has no signs of water seepage)
 
3. The upper and lower water pipes of the engine, large-circulation iron water pipes, small-circulation rubber hoses, and bone valve water pipes (must be replaced if there is no aging and shrinkage);
 
4. The fuel part generally includes the upper and lower oil rings of the fuel injector, and the gasoline filter;
 
5. The ignition part generally mainly includes whether the high-voltage line can be replaced without shrinkage or leakage, the spark plug, and the air intake part generally mainly include the air filter,
6. Other auxiliary materials: antifreeze, engine oil; whether the cylinder head is corroded or uneven, crankshaft, camshaft, anti-clocking belt tensioner, anti-clocking belt zeroing wheel, anti-clocking belt, external engine belt and zeroing wheel, crankshaft Arm or rocker shaft, if it is a hydraulic lifter with more detection hydraulic lifters, the overhaul kit includes cylinder gaskets and various oil seals, valve chamber cover gaskets, valve oil seals, gaskets and other things.