3969637/D3942589/4981795 Dongfeng Cummins L exhaust valve

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Applicable scope: Dong Kang 6L-375 related accessories: cylinder head, valve seat, valve spring, valve guide principle: control of engine exhaust and suction installation position: valve fault and analysis of block cylinder head (1): common fault fracture analysis of valve neck: (1) the engine overspeed and overload, caused by high temperature strength (2) valve guides and valve clearance is too large (3) valve seat loose (4) valve spring break or lock off (5) piston and valve (2) impact fault reason analysis of valve disc failure: (1) the valve manufacturing department asked the split off block problem caused by the disc (2) valve seat face severe wear fatigue after dropping block (3) valve cone partial ablation