[Alan Roehrich]

If you had a timing chain problem, odds are you would not have one bent valve, but rather eight, or maybe even sixteen.

It is VERY rare for a bent valve to bend a rod, break a piston, or kill a wrist pin.

Bluing of the journal, the bearing, or the rod is a sign of a lubrication problem, and/or a problem with the rod staying round.

Excessive RPM, especially in a burnout, will often over stress the rods, especially on the exhaust stroke where there is little or no resistance to upward piston motion, and only the rod stops it. When a rod bolt shears, it is usually a sign that the bolt was not properly preloaded.

I've never seen a need to spin an engine past 5K in a burnout. I count it as I'm doing a very poor job of driving if I even hit the burnout chip I usually set at 5500.