What are the symptoms of camshaft wear?

[LaylaFitz]

Symptoms of camshaft wear mainly include: 1. Increased engine noise due to camshaft damage. 2. Disruption of the valve opening pattern. 3. Reduced valve lift and shortened valve opening and closing overlap time, affecting the accuracy of valve timing. 4. Inadequate air intake and incomplete exhaust emission, making it difficult to adjust the clearance between the valve stem end and the tappet, resulting in weak vehicle performance and increased fuel consumption. Here is some additional information: 1. Introduction: The camshaft is the main driving component in the valve train, used to control the timing of the exhaust valve's opening and closing, and to drive other accessories such as the fuel pump, oil pump, and distributor. 2. Position classification: The camshaft can be positioned in three ways: lower-mounted, mid-mounted, and upper-mounted. In lower-mounted valve trains, the camshaft is located in the crankcase; in mid-mounted valve trains, it is located in the upper part of the engine block; and in upper-mounted valve trains, it is located on the cylinder head.