Dumb Question Thread - No Flaming Allowed

[sbay]

Any ideas on what to use to remove residue from cylinder walls?

[IamFODI]

The ones on older cars had a crush washer, the ones you buy now have a green o-ring.

If they have that green O-ring, that means they'd need to be replaced, yeah?

[bmwfnatic]

No crush washer then? Thank you so much!

The ones on older cars had a crush washer, the ones you buy now have a green o-ring.

[BRiley]

This is the case for the differential since they have built in o-rings. Transmission plugs are reusable and don't have a sealing ring.

No crush washer then? Thank you so much!

[Slideways]

Dumb question on transmission fluid change. It seems that some websites / DIY's say you need to replace the transmission fill / drain plugs when changing fluid. Is that true? Why not just the crush washer?

This is the case for the differential since they have built in o-rings. Transmission plugs are reusable and don't have a sealing ring.