I have purchased a used Walker that has the KohlerTH 16 Triad motor. It has a total time of less than 400 hours. I am aware of the issues with the cylinder sleeves dropping out and destroying the entire motor. This engine is running very strong and has no current issues. My question- has anyone ever tried (or heard of) pinning the sleeves into the block on this engine? A machinist friend told me this procedure is very common on older and antique engines. I would hate to tear into this to find out the this procedure would be impossible. Any thoughts?