I have a steady knock-knock-knock noise at idle, about two beats per sec. It doesn't sound like piston/bearing knock and goes away after throttle. It sounds exactly like two 1" dia. ball bearings being struck together. I removed the sc belt to see if the shaft spring had went bad, still the same. It is coming from somewhere in front of the engine. Possibly exhaust leak? How do I check? Motor mounts make this noise? It doesn't sound like normal valve/lifter noise to me. It has been getting a little louder ever since the rebuild.
111K, 11K on rebuilt motor.
111K, 11K on rebuilt motor.