BHG/cracked head/cracked block. COmbustion gases should not be present in cooling system. If that comes back clean, no gases present then look into radiator/water pump flow.
st2b said:Oh god... I match the symptoms of a BHG, and I'm N/A!!!
Does this mean I have a BHG?
jdub said:If you have a clogged radiator, you can flush it all you want and it will not correct the problem. Deposits will remain on the internal channels and will not show during/after the flush. They can only be removes by having the radiator rodded or you replace the radiator.