Precursor of Diesel Engine Valve Dropping

Below for you to introduce the diesel engine valve cylinder fall precursor.
Valve falling into cylinder is usually caused by valve rod breaking, valve spring breaking, valve spring seat cracking, valve lock clamp falling off and so on.
When the cylinder head part emits "when" knock (piston touches valve), "click" friction (piston touches valve) or accompanied by other abnormal sounds, the engine is often unstable when the valve drops off the cylinder, at this time should stop and extinguish immediately, otherwise it will damage the piston, cylinder head and cylinder liner, even the top bending connecting rod, break the body, and break the crankshaft.
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