DMiller
Senior Member
Blow air into air compressor oil feed line L side of block back to main gallery, air blows above and behind #1 main. Very little air coming out piston nozzle mount points and still whistles behind the main.
No plugs, no other ports except the cross drillings main gallery to main and main to front structure/head supply riflings. Nothing else can explain the exhaust air behind the main boss.
No plugs, no other ports except the cross drillings main gallery to main and main to front structure/head supply riflings. Nothing else can explain the exhaust air behind the main boss.