This is a proven solution without condemning the engine block. (THIS IS NOT A REPAIR KIT)TRY IT!
TimeSert Repair (ALTERNATIVE) 01-06 Toyota Camry Head Bolt Time-Sert M11 x 1.5
M11X1.5 TOYOTA INSERTS 2.4 2AZFE / 2.0 1AZFE CAMRY HEAD BOLT THREAD REPAIR KIT