Can anyone ID this radiator?

[blown motor]

This is a 26" 2 core rad. I can't find a brand name on it. Can anyone ID it by the dimples in the top. The rad cap doesn't fit tight and I'm wondering if it takes some special cap.

[blown motor]

Here's a video of me installing a brand new cap. I can turn it all the way with very little pressure on one finger.

[anlauto]

That seems odd, do you think it's the rad or the rad cap ? Have you tried other caps ?

[blown motor]

@anlauto   That cap is brand new. The cap that was on there, the Challenger cap and the Power Wagon cap all do the same thing.

[Cudajason]

no idea who made the rad...but I found this.

https://knowledge.northernfactory.com/en/articles/24-how-to-choose-the-correct-radiator-cap

looks like there are different size rad caps!