The 4G64 has two balance shafts. The one with its own belt is easy to line up, and the second one is part of the oil pump assembly, and is gear driven by the main timing belt. The wheel can look in time but the balance shaft might not be. There is a bolt you can remove on the front of the block near the exhaust manifold, and while all timing marks are lined up, you should be able to slide a screwdriver in the hole free and clear. If you hit something while sliding in the screw driver, its not correct. You can also use the gravity check, and while the timing belt is off, and the arrow is close to lining up, turn the wheel left or right, if it falls back close to lining up its good, if it lands 180 or straight up or down, its not correct. Turn it 360* and try again. There are good Youtube videos explaining the timing on these.