I've already replaced the VCT solenoids and seals twice. I'm losing about 2 qts per 1000 miles. Not sure if it's all from this leak or if the engine is burning some as well. There is no obvious sign the engine is burning it though. I'm not sure if it's related at all, but at low RPMs the engine kind of pulses. Like when I'm driving through a neighborhood and have a light foot on the gas. Anyone have any ides on either or both of my scenarios?