Have just stripped an AC Cat Paw engine that was rebuilt some years back for a previous owner….had just to have liners reset as they had dropped.
The engine has a Dunn water jacket replacement, so I determined to completely strip and acid clean before rebuilding, as any faults here would bite us in the ass when we run it up after rebuild.
Best decision ever! Block cracked, and the front water channel is rotted out plus weaken beyond belief….and to add to the insult, crank and rods need re-metal and are 0.050″ down now! bore 0.008″ over and tappered, pistons old used with “Cord” rings…still dropped under own weight…..When the now owner shock hands on the deal and said “Done” the seller should have replied …”You certainly have been!!!!”