What happens is when the connector ends break, the oiler tube has no oil pressure because the oil leaks out at the broken connector. No pressure means no oil coming out of the little holes and dribbling on the cam. After about an hour of running the cam dry, the lobes are toast.
And yes, Peter means that they try to reuse the tube and broken plastic bits.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.