Almost sounds like the mechanic failed to completely bleed out any remaining air when he did the thermostat. Your system may be trying to purge it. Do what Tom said and take it to a radiator shop(not the mechanic) and tell them the story.
Almost sounds like the mechanic failed to completely bleed out any remaining air when he did the thermostat. Your system may be trying to purge it. Do what Tom said and take it to a radiator shop(not the mechanic) and tell them the story.
The reasonable man adapts himself to the world; the unreasonable man persists in trying to adapt the world to himself. Therefore all progress depends on me.