HI GUYS. ANYONE HAD THE VANOS UNIT REPLACED ?? MINE IS AN '01 WITH 70 K MILES. I FEEL A VERY SLIGHT LOSS OF POWER AND A MINUTE DETERIORATION IN THE SMOOTHNESS ON ACCELERATION. I'VE READ THAT THE SEALS IN THE VANOS PISTONS START DETERIORATING, CAUSING A LESS THAN OPTIMUM EFFICIENCY IN THE VALVES TIMING. ANY IDEAS ?? THANKS.