What are the symptoms of engine valve leakage?

[KalebMarie]

The symptoms of engine valve leakage include: 1. Insufficient power and slow acceleration; 2. Scattered engine noise; 3. Backfire in the carburetor; 4. Black smoke from the exhaust pipe; 5. Reduced resistance when cranking the crankshaft. The causes of engine valve leakage are: 1. Damage or detachment of the valve lock or lock piece; 2. Excessive clearance between the valve stem and the guide; 3. Wear or erosion of the working conical surface of the valve and its seat ring; 4. Bending or breaking of the valve stem; 5. Weakening or breaking of the valve spring. The solutions for engine valve leakage are: 1. Clean the fuel supply pipeline and the filter screen of the pipe joint; 2. Drain the accumulated water at the bottom of the diesel filter; 3. Check whether the joints of each oil pipe are tightened; 4. Replace the valve spring; 5. Replace the new piston ring.