318 expansion plug leaking

And the dish plug behind the camshaft: lay it in there dish out and put a 1/2 deep socket on its middle, then smack it hard. The dish will bend in and expand the OD a few thou in the process, sealing it. I replaced a freeze plug with a steel replacement (sunday afternoon job, no time for brass order) but I painted the back with ultra copper RTV prior to installing it. Filled the block the next morning and the darn thing looked new 5 years later when I rebuilt it. The others were close to rust through