How Often Should the Drain Plug Be Replaced?

[VonErin]

Steel oil pan drain plugs generally do not require replacement, whereas plastic oil pan drain plugs need to be replaced every time the engine oil is changed. Below is relevant information about oil pan drain plugs. Function of the Drain Plug: The drain plug is used to remove dirty oil that has settled in the oil pan during an engine oil change. After draining the dirty oil, new oil can be added, and the plug serves a sealing function. The Drain Plug Washer Must Be Replaced: The compressed washer loses its ability to deform, so a new washer must be installed every time the drain bolt is removed during an oil change. Failure to replace it may lead to oil leaks. Even if tightened with high torque, it can accelerate thread wear and make future removal more difficult.