Can someone tell me what would cause a lot of smoke to be coming out of the valve cover oil breather cap on my 440? My car had been sitting for a couple of months without being run and during this time I took the intake and valve covers off to clean and paint them. After reinstalling the parts, when I started it it now has blue smoke puffing out of the breather cap through the hose and into the air cleaner. It seems to run O.K. but the smoke is really noticeable and doesn't seem to be diminishing. Would this be due to a stuck valve or is it likely something else is causing it?