BEEN THERE DONE THAT,99%CHANCE THAT HARMONIC BALANCER IS THE CULPRIT! SOUNDS AS THOUGH "ROCKS" ARE IN SUPER [...] REMOVING BALANCER YOU MAY ALSO WANT TO REPLACE CRANK SENSOR,IT CAN GET DAMAGED FROM BALANCER OR DURING [...] I RECALL "MATCH-UP" OLD BALANCER UNIT... Login to read more.