Diagnosed as rod bearings for knocking sound on start up on 1999 Toyota Celica

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
when car is started it makes a loud knocking sound, one guy said rod bearings need to be replaced.
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is it just on start up or all the time?? did the tech do a manual oil pressure check??

on start up and i don't think there was an oil pressure check done on the car.