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Message: [QUOTE="Rich Rohrich, post: 1152170, member: 16241"] If you are sure you are getting adequate flow through the cooling system it's fairly easy to check if the combustion gases are leaking into it and raising the pressure. Just attach a radiator pressure tester in place of the radiator cap and fire the engine up. You should see very little pressure rise with the engine running on the stand and a fan blowing on the radiator to get some airflow. If you see a fairly quick pressure rise it's a good sign that the head gasket is leaking. [/QUOTE]