在解放牌发动机大修过程中,当总成分解清洗后,对缸体进行水压试验时,常发现缸体装气门弹簧的上承孔内漏水。当发动机运转时,由于气门弹簧的上下振动频率较大,极容易造成承孔内漏水。漏水的部位,一般都在承孔上平面与内圆上端交界处。而漏水的承孔多发生在第二缸的进气门弹簧承孔。遇到这种情况,多用电焊修补。但电焊的效果并不十分理想。一是不易焊好,二是焊好后也会由于气门弹簧的上端与其接触,气门弹簧往复运动,不要多久,就会磨破漏水。近年来,我们采用在缸体气门弹簧承孔内镶套,使其获得了理想的解决。我们用此法修 In the liberation of the engine overhaul process, when the solution after cleaning solution, the cylinder pressure test, often found in cylinder valve spring bearing hole leakage. When the engine is running, as the valve spring vibration frequency up and down, it is likely to cause leakage within the hole. Leakage site, usually in the hole on the plane and the inner circle at the junction. The leaky bearing holes occurred in the second cylinder intake valve spring bearing hole. Encounter this situation, the use of electric welding repair. However, the effect of welding is not very satisfactory. First, not easy to weld, the second is welded after the valve spring will be the upper end of its contact with the valve spring reciprocating motion, not how long, it will wear leaking. In recent years, we use the valve sleeve in the cylinder valve sleeve, making it the ideal solution. We use this method repair