727 dipstick seal

[440+6scamp]

My dipstick tube has a grove in it. I assume this is for some sort of o-ring seal. Is is a standard round o-ring or more like a square seal? Where can I find one?

 

[OldVart]

NAPA has them.

 

[fishy68]

They get flattened out after it's been in a while so they look square but they are a standard round O-ring. Like Vart said NAPA should be able to help you or a hydraulic supply if you have one of them near by.