[EclipseGST]

You can but it can be a pain in the ass. Especially trying to get the old BS bearings out and installing the new ones.

Which balance shaft bearing is toast? If its the balance shaft driven off the oil pump, you dont need a bearing, just put the stub shaft in where the balance shaft bolts to the oil pump and you are set.

If its the other balance shaft, you'll have to pop the old bearings out, install the new ones 180* off from the oil port. Plug the front case and so forth.

Best bet would be to pull the motor and at least look though it. Inspect main/rod bearings for any shavings. No point in going though all that work if you dont inspect everything else. If there is any shavings at all, in my opinion, I'd tear it down and hot tank the block, make sure all the oil galleys are clean. If there was 3-4 flakes in the pan, who knows what it sucked up and is sitting in an oil passage somewhere ready to block it or get thrown into a rod/main bearing, then pretty soon you'll need a new crank or rod or both.

In my opinion... Bearings are cheap... Pick up a gasket set, bearings, and a balance shaft eliminator set and go through the bottom end.