Tweet
Can anyone describe the symtoms of a failed Harmonic Balancer ? I may be grasping at straws but a question from a friend regarding his '61 prompts the inquiry. Thanks for the help. Rick
-
-
Re: Failed Harmonic Balancer -C1
Rick - harmonic balancer failure results when the bond fails in the rubber member between the outer ring and the inner hub. This is required to allow the unit to function correctly, not only to elimnate vibration from the crankshaft assembly, but, to insure the accurate timing settings. Once the bond fails, the outer ring can walk around on the inner hub, creating a totally unsafe unit, that, if left unattended, can come apart and destroy components in the front of the car...very dangerous. I had one fail on my 81 big block 454 truck, and it basically allowed the outer ring to walk backwards against the timing cover, and I noticed it before it tore much else up. One of the easiet ways to tell if a unit has failed is to do some accurate piston placements at TDC with a stop, and see if the timing mark is at TDC or not. If there is drift, then the annular ring has shifted or rotated....Craig -
Re: Failed Harmonic Balancer -C1
Rick - harmonic balancer failure results when the bond fails in the rubber member between the outer ring and the inner hub. This is required to allow the unit to function correctly, not only to elimnate vibration from the crankshaft assembly, but, to insure the accurate timing settings. Once the bond fails, the outer ring can walk around on the inner hub, creating a totally unsafe unit, that, if left unattended, can come apart and destroy components in the front of the car...very dangerous. I had one fail on my 81 big block 454 truck, and it basically allowed the outer ring to walk backwards against the timing cover, and I noticed it before it tore much else up. One of the easiet ways to tell if a unit has failed is to do some accurate piston placements at TDC with a stop, and see if the timing mark is at TDC or not. If there is drift, then the annular ring has shifted or rotated....CraigComment
-
Re: Failed Harmonic Balancer -C1
A couple of years ago I had a balancer on my Mustang fail. I could not set the timing to anywhere near specifications. When I set it to specifications, it back fired terribly and idled rough. I had so much trouble getting it started that I think it blew guts out of my old muffler. A couple of days after I fixed the balancer, the muffler failed completely.
I timed it by ear and the timing mark did not appear on the engine mounted scale. After confirming that I had the distributor in the proper orientation, I replaced it with a rebuilt unit from Damper Dudes in Calif. I guess the symptons will vary by how much the balancer ring has slipped.Comment
-
Re: Failed Harmonic Balancer -C1
A couple of years ago I had a balancer on my Mustang fail. I could not set the timing to anywhere near specifications. When I set it to specifications, it back fired terribly and idled rough. I had so much trouble getting it started that I think it blew guts out of my old muffler. A couple of days after I fixed the balancer, the muffler failed completely.
I timed it by ear and the timing mark did not appear on the engine mounted scale. After confirming that I had the distributor in the proper orientation, I replaced it with a rebuilt unit from Damper Dudes in Calif. I guess the symptons will vary by how much the balancer ring has slipped.Comment
-
Re: Failed Harmonic Balancer -C1
I have also experienced a damper problem, on one of those F*** cars. In this case, the damper got loose on the crank and wore the keyway down to the point it needed replacement. Had a crank bolt too. So much for F*** products.Comment
-
Re: Failed Harmonic Balancer -C1
I have also experienced a damper problem, on one of those F*** cars. In this case, the damper got loose on the crank and wore the keyway down to the point it needed replacement. Had a crank bolt too. So much for F*** products.Comment
-
Dampers can be rebuilt...
As long as the metal parts are intact. The nice part is you get to use the one originally balanced for your engine, which for my money is better than a new one. I have sent many out through Glazier's Mustang Barn (other posts refer to these vehicles) and they come back good as new. About that center bolt- happened to me, too. Immaculate threads+proper torque+Loctite=end of problem.Comment
-
Dampers can be rebuilt...
As long as the metal parts are intact. The nice part is you get to use the one originally balanced for your engine, which for my money is better than a new one. I have sent many out through Glazier's Mustang Barn (other posts refer to these vehicles) and they come back good as new. About that center bolt- happened to me, too. Immaculate threads+proper torque+Loctite=end of problem.Comment
-
Thanks for the responses, NM *NM*
Comment
-
Thanks for the responses, NM *NM*
Comment
Comment