A friend who owned a radiator shop out in California close to mine back in the mid-1970s showed me a trick. Cut a short spool off the smaller diameter hose and slip it over the radiator nipple. Then slide the bigger hose over it DRY- - - -no sealer or lubricant, and tighten a worm drive clamp over the whole works. Crank the clamp down TIGHT! It will hold all the pressure the cooling system cam generate, without slipping. Works like a charm!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!