Is a washer needed on an oil drain plug?
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The washer is there to prevent oil from leaking. So if you mind having some oil leaking, I’d recommend redoing the job.
How important is the washer on the oil pan bolt?
The crush washer is used to protect the oil pan from the frequent torquing of the drain bolt. The crush washer’s purpose isn’t to help create a seal, it’s to help “cushion” the oil pan from the drain bolt.

Are all oil pan drain plugs the same?
Are oil drain plugs universal? There is no such thing as a universal oil drain plug. However, the industry uses a few standard sizes that are widely available.
Can you reuse oil drain plug washer?
You didn’t replace the drain plug gasket. These copper washers are not designed to be reused, and they should be replaced at every oil change.

What’s the purpose of a crush washer?
They provide a little spring pressure (helps keep the fastner tight) between the mating surface and the nut or bolt. You can use them repeatedly.
Why is my oil plug leaking?
There can be several reasons why your drain plug is leaking. Your plug may use a crush washer, a gasket or a combination of these two components to help seal it. If the washer is missing or deformed or if the gasket has dried out or torn, then these may be responsible for the leak.
Do you need a new oil drain plug for oil pan?
If the bolt or oil pan have been cross-threaded, you may need a new oil drain plug. In some cases, an oversized oil drain plug will cut new threads to help you avoid replacing the entire oil pan. Before you commit to an oil pan repair, pick up an oil drain plug from O’Reilly Auto Parts.
What is an oil drain plug used for?
It is used to drain the oil from your pan during an oil change. If you notice a leak at the oil plug, in some cases it can be as simple as replacing the gasket.
Where is the oil drain plug located on a car?
The oil drain plug is typically located on the bottom of the engine on the oil pan. It is used to drain the oil from your pan during an oil change. If you notice a leak at the oil plug, in some cases it can be as simple as replacing the gasket.
What to do if your oil drain plug is leaking?
If you notice a leak at the oil plug, in some cases it can be as simple as replacing the gasket. If the bolt or oil pan have been cross-threaded, you may need a new oil drain plug. In some cases, an oversized oil drain plug will cut new threads to help you avoid replacing the entire oil pan.