Yes, you need to completely remove the oil pan in order to remove the timing cover.....the oil pump pick-up tube is holding it in place, so you have to drop the oil pan enough to remove the 10mm bolt that has the pick-up tube attached to the windage tray.....look at my photos above and you will see that.
Also, the diagrams you have in your recent post are for a B2000 engine, not the B2600i engine......I will get the correct one and post it here soon.