[mike1967]

breather pipe to rear of rocker cover leaking, rocker cover gasket leaking, little earth wire on front of engine maybe, you say no codes in ecu what are you scanning it with,

 

[mike1967]

you cant tell be sight if chain is nailed unless you turn engine to view the writing on the camshafts are both facing upwards and even as such, or best way drop the timing lock kit on them,, 100k petrol never had a chain done it will need doing anyway