instead of just replacing the caps at minimum i would replaced the entire r-134 conversion fittings, they dont look to happy. and they are only a few dollars a piece.
Just blast them clean.........
If they're not leaking, leave them alone.
If I tried to replace them, they'd probably start to leak, and I'd lose my whole r134a charge............
![Yup yup :yupyup:](https://board.marlincrawler.com/Smileys/marlin/yupyup.gif)