stuck a camera down the sparkplug holes. bores still have hone marks visible, cant see any signs of damage to the piston heads.
we dont have a leak down tester that gives measurements, though we lined them all up a TDC and put ~100psi into each cyl. all cyls had a little leakage on intake and exhaust (very small amount could be heard leaking out), none of the cyls gave any bubbles in the coolant however with the oil filler cap off there was a fairly audible amount of air coming out though i am not sure how much should be leaking out from there if everything is fine.
as far as the valve guides go, i am not sure though the valve stem seals were replaced in 2008