Lamb2221

I just had the local dealer replace the valve cover gaskets on my 2001 LS430. A day later while rolling down I-80 at about 80-mph I felt the car hesitate, choke out a blue cloud of burnt oil and then it ran fine, until I started it again later that day. Then I noticed another large blue cloud of burnt oil. Now it appears I have an oil burning problem. I just turned 163,000 miles and figured I'd have the the valve cover gaskets replaced. The oil leak was only a small problem usually obvious just after an oil change for a week or so. But now after fixing the valve cover gasket leak I have a bigger and uglier problem of burning oil from the right bank of the engine. Any suggestions what the cause might be or even better, how does it get fixed? Thanks - JL.