I have had two different occasions where the pistons should have slapped the valves. <img src="/forums/images/graemlins/scared.gif" alt="" />
One time the cam locating pin sheared . That should have done it.
Second time the chain broke! <img src="/forums/images/graemlins/frown.gif" alt="" />
Both times I was fortunate and only needed to replace timing kits and the pin.
ymmv
Danny


1985 SR5 4Runner
eLocked with Carter Lock
4.7:1 single case
Davez Offroad twin stick