[49r]

I chased this one for a while with my 8BA. New rebuild, decked block and heads. Bubbles didn't always show in the radiator and would only blow out the overflow when I pushed it ... until the head gasket let go properly and I lost number 8. Out hosed the tell-tale water when I compression tested the cylinder. Put on another new composite gasket that was hanging on the wall (maker unknown but looked ok). Re-checked head torque after every run but 200 miles later same problem. Leak-down test identified the cylinder. Replaced head gasket with Fel-Pro and 200+ miles later I think (hope!) I've got it beat. Lesson for me - use top quality head gaskets and keep checking head torque after every run (cold) until there is no more movement.