Turtle...thanks..thought it should be cast in liners...
Bi-metal strips used for anything to do with measuring and/or tripping a switch
like your home thermometer, etc...uses a bi-metal strip coil
Where the strip has two different metals fused together and then wound into a coil
As it heats/cools, it will move because of the difference in thermal expansion
and contraction rates of each metal working on the other side
Not difference with cast iron liner cast into an aluminum block, but much thicker
sections..so the movement is held from moving...until one or both metals reaches
a certain temperature...where it can wrap the thinner material and in this case
guessing the liner
Pre-ignition/knock/etc attains a much higher temp than normal running and why
it can and does melt pistons, valves, etc
Not the whole block, but in the CC area. There is such a thing as wrapped blocks
and heads....cast iron and aluminum without liners
Maybe they will scope it through the spark plug holes
Also, go back to Turtle's original comment to check your radiator stack, which
is the ATF Aux radiator, then the AC radiator, then the main engine coolant radiator.
Lots of stuff can get in there to block good air flow
Hope they warranty your engine and good luck with that
