Here is a great site on how to build a motive flow bleeder - for servicing brake systems. My version is slightly different.

OK, its Saturday afternoon and you just realized you need a water pump gasket,"... that'll come to $3.95 plus $9.00 in shipping and we'll get that right out to  you in a couple of days." Sound familiar? Well it has happened to me and even though I'd rather use a die cut gasket, I'm not above improvising. For the very few of you brave (or foolish) enough to cut your own gaskets, here is the pattern that will help. I believe this will work for all 944 engines. Hint, use a piece of copper tubing, with the inner diameter filed (using a rotary file) to create a sharpened edge, and punch the holes.