Dumb Question Thread - No Flaming Allowed

[Slideways]

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

Yes, TIS states to replace the entire plug. I have taken out the o-ring to measure it and it shouldn't be too difficult to find a bag of replacement o-rings.

The older style plugs, which I kept in case I want to revert back, did use a crush washer, but realOEM no longer lists a part number for the crush washer for the E46. You have to go to an older model, like the E31, where they still have it on the diagram funny enough.

[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!