The other day i replaced my thermostat on my mr2 turbo and the whole dip stick come out with the tube which connects to the sump.

.

.

on the tube bit has it meant to a a O ring seal.

all i did

was just put it in the hole and connect the support nut back on at the top.

? if the O ring not on will i lose oil or will i get oily smell in the cabin.

any help would be greatful?

cheers all
dave