What is the reason for oil leakage from the side cover of the oil passage in the Caterpillar 320c engine?

1 Answers
Kate
07/30/25 7:04am
Caterpillar 320c engine oil passage side cover oil leakage is caused by blockage of the excavator oil tank oil pan filter screen; aging of the excavator seal; or damage to the excavator piston rings. Start the vehicle for inspection: Start the excavator engine, open the oil cap on the valve cover, and cover the oil cap with your hand. If there is strong internal pressure, the reason is damage to the excavator piston rings, and new piston rings need to be replaced. Check the engine oil: Open the oil cap, dip a little engine oil, and smell whether the oil has a diesel odor. Alternatively, drop the oil on corrugated paper and check whether the oil stain spreads quickly. If this occurs, it indicates excessive downward blow-by gas, and the piston components are worn. The decision to replace the matching parts should be based on the degree of wear.
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