Hi im new to fords,diesel, forms, and combustion gasses getting into my coolant. The rig is 1987 f350 6.9. C6 auto. 4x4 crewcab. No obvious signs of head gaskets leaking and runs very smooth. But tested positive for combustion gasses in coolant, it was boiling some off and gurgling so thats why it was tested.. So. Who thinks retorqueing the heads can get me through for a while. 2nd car this year with a failing head gasket. I don't have a garage or Bunch of dough left. And only need the truck on weekends. Any help appreciated.