Please elaborate all the things that have gone wrong. I have seen two people with a broken clutch and it didn't harm the motor. Likely a bad batch of clutches. Ironic that so many AC guys want those clutches for their AC's. There has not been any significant problems with the 800 CFI2 motor. I've only heard of one burn down. I've also heard of three eTec burn downs (which is not significant) and several AC Diamond Drive issues. The IQ 800 (CFI4) did have more issues and that motor needs to have some add-ons to insure durability.
I may have worded that wrong The clutch is the part that is breaking not the crank shaft so no it is not a motor issue.