Correct. The remaining wall stabilizes the repair sleeve. I usually use a polymer sealer on the repair sleeve that bonds to the old remaining wall and seals the top and bottom of the repair. No failures.
As mentioned by mr. P body. I also have some repaired BBC engines out there, that had to have Darton thick wall sleeves. One a Dart block that had massive damage. No cylinder wall left and partial cam tunnel damage. Also a roundy round Dart small block with two adjascent cylinders completely gone. Still running hard.
Last edited by BOBCRMAN@aol.com; 10-04-2012 at 08:19 AM.