I built this motor to put in my Prius and put in the best available upgrades to eliminate the notorious oil consumption and head gasket issues the gen 3 Prius is known for. The motor has been completely disabled new parts installed crank, rods, main and rod bearings, pistons and rings, completely disassembled the head and replaced valves, valve springs, and seats new timing set and head bolts, the latest upgraded head gasket from Toyota all o rings seals and gaskets this motor was built to have the worry trouble free reliability Toyota is known for and expected from a well maintained Toyota