Coolant leakage problems

[stumpy]

Long time lurker, new poster. 1990 ZR!. 48K, owned since 1995, stock except aftermarker injectors. I blew radiator side tanks and just installed dewitts with new hoses and breeze SST liner clamps--now the issue, after start up as the engine warmed there became a very fine mist of coolant being thrown by the new serp belt. The odd part is as the system pressure and temp came up, the leak stops. The total volume lost is in the order of 1 ounce. Ran car for 15 minutes idle, 105 ambient AC on with no top shroud and temp still was below half way--radiator works well! Upon shut down I looked everywhere for some indication of leak origin, but none appeared as the belt threw it every where. After full cool expansion tank was down and reservior was about full, so no vacuum leak on cool down. No leaks when sitting cold. Water pump? hose conection in line with belt? small spray from hose to belt? Maybe I just need to continuously keep it at operating temp?