My Wife’s treasured 120 FHC has an oil leak at the left lower rear of the block near where the camshafts oil supply line attaches to the block. I have been trying to stop this leak for 30 years with no success. I suspect the oil supply line and have tried the OE copper crush washers, those washers that have a rubber seal in them, various sealing agents on the washers. I have replaced the oil line and two of the banjo bolts I broke by over-tightening.
I have replaced the cam cover gaskets several times with no success there either.
Any been there, done that with an oil leak in this area??