YES THOSE ARE TORQUE TO YEILD BOLTS , ALL ISUZU V6 ENGINES USE THE SAME TYPE OF BOLT AND THEY SHOULD BE REPLACED,AFTER EVERY USE , ESP AFTER A LOT OF MILES ,AND YES AGAIN ON THE HELI COIL BUT I WOULD HIGHLY RECCOMMEND A GOOD MACHINE SHOP , THAT PARTICLE ONE IS NOT FOR THE FAINT OF HEART , JERRY