I have an oil leak around where my Vernatherm screws into the oil filter adapter. It's a 90 degree adapter. I've retorqued it to 25 ft/lbs and it still leaks. So I bought a replacement gasket and I note that, like the spark plug gasket, one side is flat and one side has a little bulge to it. Is it correct that the flat side of the gasket is against the Vernatherm flange and the bulged side against the oil filter adapter? Or do I have that backward?