A bit like when working with a Haynes manual where the exploded view in the book looks nothing like the pile of bits that fell out on the floor...
Haynes manual? Models of clarity. When i was 20 I bought a worn out Lotus Elan, with no tools, money or knowledge, and needing it running every morning it was a daft thing to do. I did lash out and buy the Lotus workshop manual for it. Step 1 on changing the water pump I recall was "remove cylinder heard and sump"