We bit the bullet and dismantled, crack in the head gasket, water in number 3. Figuring hot testing, seals and other ancillary bits to put the original back together, for us to not trust it due to stresses it's been under, so we are considering a full replacement of the head.

We are in ...

After replacing the stat, water pump, checking hoses and rads and multiple see saw filling carefully we have come to the conclusion bongo is creating air somewhere in the system. Which can only be either head gasket (hopefully) or the head itself.

The bubbles/boiling are rhythmic every 25 seconds ...

Hello,

We are having exact same issues with our bongo as this thread. Could you give me an update on your difficulties, did you solve it, what else did you try, and was it the dreaded head?