This is the RS model with the 5.0 and a 5-speed. There is a continual knocking sound coming from somewhere in the engine/trans? With the use of a stethescope we narrowed it down to the harmonic balancer, which in fact was bad but not the real source of the problem. We thought it might be coming from the bell housing area. We removed the valve covers and all the rockers/lifters seem to be functioning properly. The noise is constant at any rpm. It does not get any louder with use or at a higher rpm. You can rev it up quite high and there is no sign of weakness. It almost sounds like a rod bearing but not as loud. Could a cam issue cause this? Is it possible in this engine a wristpin in defective? What else should we look at?
Sunday, April 22nd, 2012 AT 8:33 PM