The only thing screwed is some of the information contained in the
books. On the 1997 sephia service manual, under the timing belt
replacement section it says to set the cams and crank to TDC, install
the belt, and then loosen the bolt on the tensioner to allow it to
tension the belt. It then proceeds to tell you to button everything up
because you're done. Doing it this way is guaranteed to leave you with
a belt that will jump teeth.

Later in the same section of the book under cylinder head replacement,
it says to install the belt, rotate 1 5/6 turns to the tension set
mark, and then loosen the bolt in the tensioner pulley to tension the
belt and tighten to 35 ft/lbs. This is the correct way to do it.

The sephia book also says to use 'silicone sealant' between the #5
camshaft bearing cap and the head. Using silicone here will change the
oil clearance in my opinion, what you are supposed to use here is a
THIN flange sealant such as hylomar. Silicone is for the corners of
the caps and is intended to seal up the valve cover, not the cap to
the head.

I could go on and on..the book is good in some respects and just plain
sucks in others. I'm not sure if similar problems exist for the
service manuals on other types of cars or not.

Chris