doing a thorough cooling system drain and re-fill. I have read that the block drain is a 13mm bolts on the passenger (US) side of the block under #2 cylinder header. Got under there with a flashlight,.....can't see much of the block, or ANY of the exhaust header. the view is blocked by the water pump, thermostat, steering rack and various other bits. I am doing this on some low ramps in my driveway,.....not on a lift.