Reminds me of plugging tubes in scotch boiler days, " it's only a temp repair " was the norm, Years later and numerous re fits later tube " temp repair " still holding up. I can remember water leaks in the Cat saltwater pumps caused by bearing wear and the shaft running on the lip seal causing the leak. Off with the pump, press out the bearings and note the ball bearing races to be steel and pitted badly both on the balls and the track and carrier. Always tried to fit replacement stainless races where possible. However clever Mr Cat would have different sizes OD and ID by a few thousands of an inch, when you went to a Skefco or RR agent forcing you to pay more money for a genuine part. Always used the inhibitor fluid in the freshwater coolant system to avoid electrolysis problems when refilling as I remember in the 1970's doing loads of piston/liner changes as Mr Electrolysis would drill holes in the liners, first signs were water in the sump, first thought the bottom liner O ring had let go but no, complete piston liner change necessary and many were done. When refilling coolant system part no xyz 123 had to be added to avert further hole drilling as otherwise warranty null and void. In the early 70's herewith was a new thing, an inhibitor fluid.
Remembering The Good Old days, when Chiefs stood watches and all Torque settings were F.T.