Engine running sweet during ‘break in’ after top end overhaul.
Unfortunately have a small oil leak from push rod tube(s) to head or maybe the head bolt grub screw(s) on no. 2 & 4 ?
Both heads have oil under the rocker cover area, it’s not the rocker cover gasket. Could be one or all 4 tubes ?
Need to investigate to confirm.
New o rings installed at overhaul. Cyls1 & 3 dry.
Anyone had leaky grub screws or tubes ?