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. Pieceof 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 cooling pipe circulation, butterfly water pipe (needs replacement if aged 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. Jo setvalve oil ints, 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 consists of the water pump (the pump blades are corroded or the hydraulic seal is not leaking)
3. The upper and lower water pipes of the engine, large iron circulation water pipes, small rubber circulation pipes and valve water pipes (need to be replaced if they do not age or shrink) >
4. The fuel part usually includes the upper and lower oil rings of the injector); , and the fuel filter;
5. The ignition part generally includes mainly if the high voltage line has no shrinkage or leakage. If not, replace the spark plug. The air intake part generally mainly includesremove 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. reset belt and pulley, rocker arm or rocker arm 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.
The JAC Ruifeng engine is a modern engine, and it is maintained just like Beijing Hyundai. Change the oil, engine filter and air filter every 5,000 (can be replaced depending on the situation, and it can be replaced twice after maintenance). The fuel filter element and transmission oil are changed every 50000 yuan. The timing belt costs between 60,000 and 70,000 RMB. Of course, if the maintenance is carried out timely, it can be replaced at 80,000 RMB. For external generators, air conditioners and booster pump belts, the timing belt can be replaced twice and once.