Most likely, the head gasket blew, allowing coolant to pool on top of the piston. When you cranked the vehicle, the coolant created undue pressure and stress on the piston and rod. This would cause three possible scenarios, first the piston could have been damaged, second, the rod would have taken stress causing a break, bend or fracture. Third the pressure could have destroyed the tolerance of the rod bearing. Under normal repair of a blown head gasket, no mechanic could have diagnosed either without completely disassembling the engine and having all parts tested (very expensive). This is a circumstance that no one is at fault, and at this time still very costly. Trust me, I have two engines in the shop at this moment because of the same head gasket then bottom end failures.
Friday, February 16th, 2007 AT 5:07 PM