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有一辆拉达2105轿车发动机经大修后,行驶2万多公里,发动机异响严重。经断火试验断定一缸有问题,拆解检查原来是活塞销窜出而引起拉缸的。拉缸损伤良宽约1.5mm,深1mm,已无法使用,修理需更换缸套。造成这一故障的原因是由于修理装配不合要求所引起的。拉达2105发动机的活塞销为半浮式,连杆小头与活塞销为过盈配合,过盈量为0.01～0.04mm,以防止活塞销在连杆小头中转动。这
There is a Lada 2105 sedan engine overhaul, driving more than 20,000 kilometers, the engine abnormal noise. After the fire test concluded that a cylinder problems, disassembly inspection turned out to be caused by the piston pin pull cylinder. Cylinder injury damage wide about 1.5mm, 1mm deep, has been unable to use, repair needs to be replaced liner. The cause of this failure is caused by improper repair assembly requirements. Lada 2105 engine piston pin is semi-floating, connecting rod head and piston pin for the interference fit, the amount of interference is 0.01 ~ 0.04mm, to prevent the piston pin in the connecting rod small head rotation. This