The other day I noticed a knocking noise from the engine bay of my 2000 SVT contour. The noise is intermittent and happens only at idle RPMs. If I hear the knocking noise, I rev the car a bit and the noise goes away but returns once the revs go back to idle. I did some research and it looks like these cars have a lot of problems with spun bearings and a spun bearing makes a bad knocking noise. I am hoping that the knocking noise is a bad pulley since the noise is coming from that side of the engine and is intermittent and only occurs at idle. How do I tell if I have a spun bearing or have a bad pulley? The car drives fine.
