My first post..2005 pt cruiser head gasket..pin hole leak, maybe Long story short ~ will Blue Device head gasket sealer work for small head gasket leak, I realize the heads could even have small cracks without looking. I got this car for cheap, was told probably head gasket what their mechanic said. Car would get hot. So after searching the net, before this forum, flushed the coolant system, with some radiator cleaner, rinsed system out several times, replace thermostat, removed air bleed coated with anti seize/install pulled the grill, fan, radiator, after flushing, I removed the radiator completely power washed out the radiator fins, also power washed the trans cooler, and AC unit in front of the radiator. Fan looked to be new, Fan connection normal, not burned at all. So all good, to reassemble...bought a spill free funnel to fill radiator with Mopar 5 year coolant. Bleed system, ran motor, fan would kick on/off normal...thermostat would open....So I see small bubbles still coming up into the coolant spill free funnel..this is a funnel that attaches in place of the radiator cap. When the thermostat opens I get a bigger blurb. Not to bad...So getting air into the system, hoses look good, I do not see any external leaks. Should I pour some BlueDevil gasket sealer in the radiator..Anyone had success.