SunlitComet
OBS Jedi-Do Good
must be the pic. some of them dont look right. must have some harsh fuel and additives for them to look like that. you could test for leaks head cracks one way by using a combustion leak detector. it has a fluid inside that reacts to combustion gases. you hold it against the radiator neck opening while engine is running. also if you are sure you have no air in the cooling system. look for bubbling in the reservoir tank when running as gases will go there too.