Mickey Thompson 440 valve covers

SludgeWizard

SludgeWizard

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Picked these up on a whim for stupid cheap this week on marketplace, cannot for the life of me figure out what these tubes are? They have retaining clips on the inside which leads me to believe they can be spun out but I can’t get them to budge. Anyone have any insight? I figure they must be for PCV or breathers but I can’t imagine how they’d fit in the orifice of the tube. Pretty sure they’re late 60s/early 70s

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SludgeWizard said:
Picked these up on a whim for stupid cheap this week on marketplace, cannot for the life of me figure out what these tubes are? They have retaining clips on the inside which leads me to believe they can be spun out but I can’t get them to budge. Anyone have any insight? I figure they must be for PCV or breathers but I can’t imagine how they’d fit in the orifice of the tube. Pretty sure they’re late 60s/early 70s

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They are for push on breather caps. I have never seen tubes like that. Probably to keep oil splash out of the breathers. (that's what oil deflectors are for on the inside) One cover already has a hole punched for either oil fill or a pcv with a grommet.
 
Toolmanmike said:
They are for push on breather caps. I have never seen tubes like that. Probably to keep oil splash out of the breathers. (that's what oil deflectors are for on the inside) One cover already has a hole punched for either oil fill or a pcv with a grommet.
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Roger that. Yeah I’m currently trying to find a cap that will actually screw into the oil fill, gonna begin the search for some push on breathers as well.
 
It’s been decades but I thought my ‘67 Imperial had a factory push on breather like that, it connected to the dirty side of the air cleaner assembly.
 
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