Mountaintop

Hey guys. I have a strange rattle/slight knocking noise in the engine. Originally thought it was coming from the bell housing fly wheel clutch area. Pulled the trans tonight and the noise remains. Engine is a lq4 block bored 20 over flat top pistons 799 heads tbss intake btr stage 3 truck cam. Mated to a nv4500 stick shift. Have about 1300 miles on a complete rebuilt engine. Noise in constant at idle most audible at 2k rpm. It completely goes away while under load both accel and deceleration. Oil pressure is the same as it always was. No mis fire no noticeable changes in the way it runs or drive. Oil looked good nothing in the filter. Just wondering what else I can check without tearing it down. Thanks

gagliano7

Do you have a recording of the noise? Post up a video of the noise and you will get some responses.