Originally Posted by More Power
If we can assume the FD reduces the bad harmonics in these cast iron 6.5 cranks, the question I think some will ask is: "Will this end the crank failures we hear about?"
I suspect the failures we hear about will decrease, but not disappear.
Cracking failures of the 90's GM blocks could still be a contributor. Failed rubber isolated crank pulleys, defective dual-mass flywheels and loose torque converter bolts could still happen on rare occasions. Any of these pose a problem that couldn't be helped with an FD.
Another question: Could reducing crankshaft harmonics reduce the block cracking we hear about?
Jim