Just clicked on this thread since it came up on the bottom of the forum pages, but wanted to add a little tip for finding noises other than mechanical noises, such as lifters, pulley bearings, etc. If you think it may be an exhaust, or vacuum leak that you are hearing, a screwdriver/wooden dowel will not work. Get you a short(10"-12" or longer if needed) section of 5/8" or 3/4" heater hose, and use that as your stethoscope. Put one end against your ear, and move the other end around the area where you think hear the noise. You'll be able to pin-point the source of your leak.....kinda like the old days when hard-of-hearing folks used a funnel to their ear(s) to help hear. :good: :mrgreen: