[fast1075]

You are correct on sleeve replacement. The sleeves are an interference fit. They (As Racerx says) cannot be pressed out cold. You do need to heat them. When hot enough, they will come out easily. But they have to be HOT. The 600 degree oven is about right.

I used to help my machinist in exchange for "credit" towards work I needed for my dragbikes. We would put the cylinders in the oven for an hour, and on most of them once hot the sleeve would slide out, or come out with little effort.

The new sleeves would slide right in. You have to support under the cylinder and put heavy weight in the sleeves to seat them and keep them in place until they cooled off. We used 50 pound steel blocks.

After that a truing run thru the surfacer, and good to go.

Same process for big bore sleeves, except you bore the block to fit the larger sleeves before putting them in. Definately not a home garage job.