Can anyone help? Yesterday evening I pulled in my driveway put the car in park and heard a Ticking or Tapping noise coming from the engine compartment.At first I thought it was the water pump as I got out of the car to open the hood.Then getting closer to the engine it wasn't the water pump the noise sounds like it is coming from the back vavle cover maybe the camshafts chain or a valve lifter (tappet).The motor is a 1998 Duratec with 156,220 miles.The car was quite and smooth it is still smooth but execpt the the ticking or tapping noise.I've had no problems at all with this motor.Has anyone had the same problem or noise? Any comments or suggestions would be helpful! Thanks in advance and HAPPY THANKSGIVING to all. :ford