Steve W. wrote:
Bob Engelhardt wrote:
There were 2 heads at the dump, each for 2 cylinders - from a a v4
engine I'd guess. Each of the heads had 1 cylinder badly "burned",
as shown. Anybody know what happened?

Just curious,
Bob

http://home.comcast.net/~bobengelhardt/EngineHead.jpg

Looks like timing belt/chain failure. That stuck 2 valves out in each
cylinder for the piston to hit. These break off then rattle around in
the cylinder and beat the crap out of everything. This is the end
result. You DID pick up those heads didn't you??? They are GREAT to
cut up, melt down and use for casting your own projects.

Typically they would be. A mate that works in engine development has
mentioned that the heads are invariably cast from virgin aluminium in
order to guarantee the material behaves as required, at least the major
players.