Help with low anitfreeze

Also how i know if have a bad radiator cap???

 

Well it dark here and can't see anything I'll take a look tomorrow

 

See if the rubber is good and that the little plastic check valve in the middle isn't missing.

 

I think that the problem radiator cap missing check valve

 

Is this okay???

 

Nope it's missing the check valve, time for a new rad cap.

 

Thanks

 

In case it's not the failed cap - borrow a pressure test kit from an auto part store. Pressurize the system and look for pressure drop and leak.
I had the thermostat o-ring/gasket go bad. The leak was right behind the fan, the air flow was vaporizing the drops so I couldn't see the leek with the engine running. Engine off there wasn't enough pressure in the system to make it leak.

https://www.autozone.com/test-scan-.../434717_0_0?searchText=radiator+pressure+test

 

Hiw easy that fix? You have. Writeup bro???

 

Job was pretty easy. Used YouTube videos for both pressure kit use instructions and thermostat how-to fix. There might be write-ups, but I didn't look.