Quickie (ooh ahh missus!) - crush washer size and material?

[River Valley]

About to do my first oil/filter change.
Anyone kind enough to tell me what size and material crush washer normally used for the sump drain plug?
Thanks.

[limax2]

The drain plug is 14mm diameter, so the washer is usually between 14 to 14.5mm inside diameter and about 22mm outside diameter.

[River Valley]

Thanks.
Copper or Alu? or doesn't matter which? Anyone?

[limax2]

I prefer copper but it doesn't really matter which. If I'm stuck for a new one I sometimes anneal a copper washer and use it again.

[noggythenog]

& here's a pic......we do like pics 8)

[elbrownos]

Out of interest, why do people think it's so important to replace it?
I've done dozens of oil changes, never changed the washer, never had even a drip.
It's not like there's any pressure behind it.

[Dave48]

Out of interest, why do people think it's so important to replace it?
I've done dozens of oil changes, never changed the washer, never had even a drip.
It's not like there's any pressure behind it.

Its just good workshop practice. Youre tightening a steel bolt into alloy -hopefully to the right torque setting-&as the name suggests, its a crush washer designed to "spread" behind the bolt head forming a good seal. For the sake of a few pennies its peace of mind.
Probably more damage is done by overtightening components-its very common to see threads in alloy damaged by steel bolts/screws.