I may be a second grader trying to tell the teacher how to spell 'cat', but maybe I can help someone greener than I. I've just done a water pump replacement, timing belt and cam seal. Haynes helped a bit, but I was having trouble loosening the bolt at the cam sprocket. A screwdriver in the hole wasn't helping. I finally used the old belt on the sprocket only and turned the cam until it doubled on itself. Once the belt was nearly fully wrapped on the sprocket, I used a screwdriver through the loop against the head. That held it tight enough to remove the bolt.
Water pump help I can't give. Neither can Haynes.....
I'm now pretty good at removing and reinstalling it except for the seal between the pump and metal heater tube. Silicone and some trimmed red rubber garden hose washers finally did it.
I hope this helps someone....
Mark
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'94 940 Wagon, '84 240 turbo sedan, '84 245 DL