Maybe because I've done it myself (timing belt, water pump, tensioner, and idler pulleys). I didn't do the cam gears because I had already done the stuff once myself and yes it is a bit more work if cam gears have to be touched and more tools are needed. But guess what, if cam gears are not being changed (atleast on pre98s), then timing does not change. You lock the cams in at TDC with ANY piece of decent metal (a file WILL work fine) and you have the crank pulley aligned with the notch on the block. It's all pretty easy stuff to do. The only time I've heard of needing any kind of peg was during an engine rebuild. Ooo but what would I know, I've only done it on my own car.
