Coolant overflow tank bubbling after coolant change.

[Beachhead]

So I just did a coolant change (not flush) on my 2000 4.0. I had no idea when the coolant was last changed as I just bought this Jeep. We drained what we could and put in the Zerex G05 50/50 stuff everyone here talks about. Drove it for about 15 minutes, and upon parking it I noticed a bubbling noise (boiling?) coming from the overflow tank. This did not happen prior to the change.

There is no leaking, it's not overflowing out of the tank. The overflow tank is at the "FULL" mark, and the gauge wasn't going crazy.
I've read possible radiator cap, but it was working fine just earlier today prior to the change.

Any insights would be helpful, thank you.

 

[StefTCK]

Did you bleed all of the air out of the system after switching out the coolant fluid? That was the solution for multiple of my radiator related problems.

 

[Beachhead]

Did you bleed all of the air out of the system after switching out the coolant fluid? That was the solution for multiple of my radiator related problems.

I did not

 

[Dunkut88TJ]

Burp it, if your overflow tank is full it may cause quite a mess!