After checking this with a long screwdriver too my ear, I can hear this more when I put this on the valve cover and the ubit right behind the valve cover, (air intake system). Could it be an injecter? When I increase the throttle it does speed up a hair, not much. The sound is like if a pully was bad, checked the belt which needs to be replaced but all runs true. I can hear the rods and lifters with using the screwdriver and all sounds to be good. If you took the end of the screwdriver(plastic handle) and tapped it on the valve cover this would be the closest sound I can say. You can hear this every second. With driver window down and hood closed you can hear this noise while driving. Enough to bother me. Rev the engine and this will increase a bit. Im so stumped on this one. Im a shade tree man, but back in the late 60s and 70s.
Saturday, July 27th, 2013 AT 10:50 AM