93 300SL oil pressure problem

hi, while im driving my 1993 300SL the oil pressure will just drop to zero when i am above 30 and also below thirty. At idle its at about 2 but when i hit the gas it drops to red and i already changed the sensors at the filter and at the oil pan. After a while the engine starts to click and at cold it also clicks really loudly. This all happened after my camshaft broke and my timing chain also broke. When i put the car back together everything else seemed fine except now i have this oil problem. If anyone has any ideas i would appreciate it. Thanks

worn out bearings and camshaft cap bearing.