What are the symptoms of a faulty exhaust valve in a Zhijun car?

[McBarrett]

Symptoms of a faulty exhaust valve in a Zhijun car include difficulty starting and engine shaking. Location of the exhaust valve in a Zhijun car: It is located under the hood, in the upper left corner of the engine. Maintenance of the exhaust valve in a Zhijun car: The valve should be stored in a dry and ventilated indoor area, with both ends blocked. Valves stored for a long time should be inspected regularly to remove dirt, and anti-rust oil should be applied to the machined surfaces. After installation, regular inspections should be conducted, mainly checking the wear of the sealing surfaces; the wear of the trapezoidal threads on the valve stem and valve stem nut; whether the packing is outdated or ineffective, and if damaged, it should be replaced promptly. After repair and assembly, the valve should undergo a sealing performance test.