I know this has probably been covered before in "The Forums", but I'm not sure my problem is exactly the same. I've read about drilling the crank tip and threading it for a bolt to be used hold the harmonic balancer on, but the harmonic balancer on my engine is loose side to side, not front to back. In other words, it moves about 1/4" to 1/2" back and forth and in so doing, the water (fan) pump moves as does the alternator and a/c compressor. So, it is slipping back and forth, or left and right, on the crankshaft. when idling, it sounds like bottom end internal engine noise. At any amount of RPM's off of idle, there is no noise. Any ideas on how to fix this?