Hey guy,s i have a tb42e which use,s some coolant but the funny thing is it doesn,t leak on preassure test and comes up negative on a t,k head check, doesn,t o'heat, no milk in oil but a little if i do a heap of short runs as soon as it goes on a decent run perfect!! is there any other place these things leak like oil cooler or something like that??? before i bite the bullet and pull the head of hopefully someone can give me a magic answer lol