Sometimes when I start my car in my driveway on a hill. I get a knock it sounds like a lifter on the passenger side like its not getting oil. Friend thinks its a rod knock but it doesn't sound like one to me and it would do it all the time I would think. Anyway has 49k on it anyone heard of this? 3rd time it has done this in like last 3 months doesn't matter if the motor is warm or cold.

Also when you move to flat ground and turn it off then start it again its gone. Today when I started it did it and then went away after like 30-45 secs.