[30 Closed Cab PU]

I've heard the black pepper trick long ago by my deceased father, when I saw him doing it to an old tractor he had. He informed me that it was an old farmer/ truck driver fix. He told me it was an on the road Quick Fix , but not to be relied on. I always wondered what happened to the rest of the pepper not needed/used to stop the leak. just does not seem like a good idea to me. Possible it could cause other issues, make a radiator clog up over time, etc.? Kinda like using Bars stop leak, radiator guy told me that it can float around and eventually clog up the radiator.
You could try to locate the leak, and solder it , if leaks continue to develop, have it professionally repaired, or replace. If radiator pretty old, replacement will provide trouble free fix. Upper radiator coolant hose filter is recommended. If you flush/backflush do radiator and block separately to avoid plugging the radiator. You having experience may already be aware of this info.