Eaton gas cap, original or aftermarket?
 

I picked up an old gas cap. It was advertised as an Eaton.
There are no Eaton markings on the inside.
Did Eaton make them without adding their markings?

Re: Eaton gas cap, original or aftermarket?
 

Rusted away. Looks like they would have to pay royalties if it isn't.

Re: Eaton gas cap, original or aftermarket?
 

The direct answer, which is helpful in future searches of the forum:

The picture shows an original Eaton gas cap. This is because of the vent holes and a side profile would show a height of about 1/2”.

Re: Eaton gas cap, original or aftermarket?
 

Dissolve the rust (Evaporust) and you may be able to see some traces of the printing with a magnifying glass. This view looks like an Eaton cap. A side view would help.

Re: Eaton gas cap, original or aftermarket?
 

My cap is rustier than this one :(

Is it better to use Evaporust and clean it up?

Or buy a new reproduction cap?

Re: Eaton gas cap, original or aftermarket?
 

Okra - I have not had good luck with repro 30/31 caps, they've either been too tight to rotate to seal (had to bend the tabs on the cap) or too loose to seal properly (had to fiddle with gaskets). As with most things, if you can find a good original, perhaps needing a bit of cosmetic work, much better than going repro.

Evaporust, followed by some pickin' to make sure the vent holes are open, would be my suggestion. BTW, Evaporust says that you can immerse for minutes to hours, I have not found that effective, I go overnight on almost all things.

Re: Eaton gas cap, original or aftermarket?
 

I have soaked it in Evaporust. It removed all the rust but there is no trace of any markings.

Re: Eaton gas cap, original or aftermarket?
 

Can these caps be disassembled to work out dents in the top and then re-assembled?