Does anyone know what this is?

Spray some soapy water on it to be sure. After that, pull the line and re-seat it. If that doesn't work, cut 1/2" off, and re-seat. If that doesn't work, pull the collar out and replace the O-ring.

 

It depends. Composite push-connects usually aren't rebuildable, but that manifold should have O-rings in it. If it doesn't, then you could need the whole part. That's worse case scenario, though.

I have a thin carburetor spring, and I bent one end of it into a very small hook. Works great for pulling out those O-rings. But if they're dry-rotted, it will ruin them. So make sure you have a new O-ring on hand before you go digging in there.

 

You're welcome. Is that line 1/4 or 3/8? I can give you a rough O-ring size.

 

If it's 3/8, you're looking at possibly a 110, or a 204. I have a push-connect on my truck that's a 204, but the rebuild kit for the push connects in the tank are a 110.

 

And what if that dont work? Lol

 

Remove radiator cap, drive a new truck underneath, replace radiator cap!!