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What are the symptoms of a faulty oil filter?

2 Answers

Silva

07/30/25 2:41am

Oil filter failure symptoms include: oil light activation, poor lubrication, oil burning, etc. Here is relevant information: 1. The oil filter, also known as the oil element, is used to remove impurities such as dust, metal particles, carbon deposits, and soot particles from the oil to protect the engine. Oil filters are divided into full-flow and bypass types. The full-flow filter is connected in series between the oil pump and the main oil passage, thus filtering all the lubricating oil entering the main oil passage. The bypass filter is connected in parallel with the main oil passage and only filters part of the lubricating oil delivered by the oil pump. 2. Under normal circumstances, various components in the engine are lubricated by oil to function properly. However, metal shavings generated during component operation, incoming dust, oxidized carbon deposits under high temperatures, and some moisture will continuously mix into the oil. Over time, the service life of the oil will be reduced, and in severe cases, it may affect the normal operation of the engine.

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McGenesis

08/16/25 8:57am

I've been driving for several years and have encountered many symptoms of oil filter failure. The oil turns black and dirty because impurities aren't being filtered out, feeling sticky to the touch. The engine noise becomes significantly louder, especially when accelerating, producing a humming sound like metal rubbing. The oil pressure light also comes on, indicating a system issue. If not repaired promptly, engine wear will accelerate, and oil leaks may occur in the oil circuit. Last time, because I was lazy, my oil pressure became unstable, and fuel consumption skyrocketed. I recommend regularly checking the oil condition and changing the filter every 5,000 kilometers—it only costs a few dozen bucks and can prevent major repairs costing thousands. Daily observation is crucial; for example, if you notice oil stains on the ground after parking, it might mean the filter's sealing ring is damaged and leaking oil.

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