No, recovery tank should not be under any pressure as there is a breather at the cap.
You did not tell me the radiator cap rating when I asked previously.
You mentioned slight warming, how high did the gauge show? Maybe you are paranoid after so much time figuring this out? Lol.
The coolant being sucked back indicates the head gaskets should be good.
Tuesday, July 17th, 2012 AT 4:46 PM