Automotive engine overhaul mainly includes replacing valves, pistons, cylinder liners or cylinder boring, shaft grinding, etc. According to the 4S general stores standard, 4 components need to be replaced, namely pistons, piston rings, valves, valve oil seals, valve guides, crankshaft bushings, connecting rod bushings, timing belts and tensioners.
1. Which projects should be reworked?
1. If chain shimming is necessary, the timing chain and tensioner must be replaced. In addition, the machining, lower bore cylinder sleeve, grinding shaft, cold press pipe and overhaul kit need to be replaced. replaced. Front oil seal, rear oil seal, camshaft oil seal, oil pump, valve, etc. Sometimes it is necessary to replace external parts, such as clutch plates, andvs. In short, it is necessary to replace all the parts that are. Not sure if installed. Engine repair ensures engine performance.
2. 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. ;
3. The cooling system usually mainly includes the water pump (the pump blades are corroded or the hydraulic seal has water seepage), the upper and lower water pipes of the engine, the high circulation iron. water pipes, small circulation pipes and butterfly water pipes (with aging problems). (If it expands, it needs to be replaced), thermostat, etc. ;
The fuel part generally includes the upper and lower oil. injector rings, fuel filter; the ignition part:if the high voltage line is swollen or leaking, replace it and the fire piston; the upper and lower oil rings of the fuel injection nozzle, fuel filter;
< p>4. Ignition Part: Replace the high voltage line if it is swollen or leaking and the piston is on fire;5. The air intake part usually includes the air filters; >6. Other auxiliary materials generally include antifreeze, engine oil, engine oil filter, detergent, engine metal cleaner or all-purpose water
7. Components to be inspected generally include if the cylinder head is corroded; or uneven, crankshaft, camshaft, timing belt tensioner pulley, timing belt adjustment pulley, timing belt, external engine belt and adjustment pulley, rocker arm or rocker arm shaft, if it is 'a hydraulic lifter, please check the hydraulic lifter
8. Piecee of the cooling system: water pump (the pump blades are corroded or the water seal is leaking), the upper and lower water pipes of the engine, the large iron circulation pipes, the small pipe circulation, the butterfly water pipe (must be replaced if it is old and swollen);
9. Fuel part: The overhaul kit includes cylinder gaskets and various oil seals, valve chamber cover gaskets, valve oil seals, etc. Gaskets and other things;
Engine overhaul projects usually include engine overhaul, cylinder head plane machining, cylinder boring, water tank cleaning, grinding of the valve, cylinder liner insertion, piston pressing, oil circuit cleaning, engine maintenance, generator set maintenance, etc.
2. Parts that must be replaced during engine overhaul
1. Set of jvalve oil seals, a set of intake and exhaust valves, a set of plug rings and a set of cylinder liner with 4 tappets Two pieces, large and small tiles, 4 plugs,
2. The cooling system usually mainly includes the water pump (the pump blades are corroded or the water seal is not leaking)
3. The upper and lower water pipes of the engine, large circulation iron water pipes, small circulation rubber pipes and valve water pipes (need to be replaced if there is no aging or shrinkage
4. The fuel part generally includes the upper and lower fuel oil rings); the fuel injector and filter;
5. The ignition part usually mainly includes whether the high voltage line has no shrinkage or leakage. If not, replace the spark plug. The air intake part generally mainly includesent the air. filter.
6. Other auxiliary materials: antifreeze fluid, engine oil; if the cylinder head is corroded or uneven, crankshaft, camshaft, reverse timing belt tensioner, reverse timing belt reset pulley, reverse timing belt, external Engine belt and reset pulley, rocker arm or rocker shaft. If it is a hydraulic lifter, please check the hydraulic lifter further. The overhaul kit includes cylinder gaskets and various oil seals, valve cover gaskets, valve oil seals, gaskets, etc.