Any authorized Kohler dealer can make a warranty claim for you, but it is not a automatic adjustment. They must see the unit, verify that the block cracked due to loose bolts, fill out the paper work, and hope that they have a good reputation with their Kohler Distributor. If it is approved you would get a short block, but they would have to change over the engine and install at your cost. I have heard that some dealers don’t want to go through the hassle, some have poor reps with distributors, due to questionable claims, some over charge for the changeover and put the job on the back burner. Because the warranty has been going on for so long, Kohler has really tightened up on its claim adjustment, too many claims due too age of the unit and ????? claims, which at this time is understandable. Good luck in your decision.