Engine Vibration - 3K RPM

[bbcc]

Internal or external balance? If its external check to see that 1) the dampener hasn't rotated on the shear pin 2) the weight is still fastened to the dampener 3) the weights are still fastened to the flywheel 4) there arn't any teeth missing or big gouges on the flywheel. If its internaly balanaced check for the same things, but if nothing is found you are going to have to drop the pan and inspect the bottom end. Also check the distributor and/or ignition box. Maybe swap these items with some known good ones.



Good luck bbcc