After "resurface" the head, valve and seals ( and bleed the lifters) went for a road test...
Engine was quiet... when reach 6.500 RPM in 5th... bang..
A strange noise , and engine is making a " tic tic tic tic " noise....
Before further investigation mechanics guess could be a hidraulic lifter problem..
Car is 35k miles..
How often Hidraulic lifters offer issues?
Thanks a lot.
Mario.