how can i tell the difference? I already have a bhg on the thing but she blows some blue smoke and uses about a 1-2 quart every 3000. I obviously cannot do a compression test with a bhg at the momment, whats another way? I was thinking a leak down test, but that would not work either with my bhg? No oil in coolant or vice versa. She smokes white and blue, haha and almost 200,000 miles on ORIGINAL HEAD GASKET!