Good morning all,
I did some searching but only found some older threads that didn't directly apply. What are options for installing new valves in slightly used guides and seats? Sounds like hand-lapping is no longer recommended.
Situation is thus: stock 3.0 aside from PMOs and headers in a track car that's only used for DEs. Engine has just under 12hrs since it was completely rebuilt, 6500 red line. The heads and valves were in good shape so just installed new guides and the seats and valves were ground. My engine builder also advised that safety collars were a better alternative to carrera pressure-fed tensioners.
During the last event, the 1-3 tensioner & said safety collar failed at 5800 rpm allowing the cam to slip a few teeth... You all know how this turns out... intake valves hit pistons, all 3 rocker arms broken.
I'm borrowing a leakdown tester this weekend to see if the valves are bent, but given the track only nature of the car, I'm inclined to replace all 3 valves given the impact they suffered. What say you all for the best course of action to get back on track? Thanks!
