[lovnthe70]

The air bubbles could be an indication of a head gasket leak, im in the middle of troubleshooting a similar problem myself, i just haven’t had time to do anything lately though. I would let the truck run for a while with the cap off so any excess air can get worked out of the system and then rent a pressure tester from autozone or somewhere and do a pressure test. I would also stick with the 180 t stat and get a new cap. good luck! and you also said you dont have a shroud? I would pick one up as they can make a big difference.