Well, so far it seems to have worked for me, although I can always report back.
Basically, I noticed that the best way to bleed a 944 is either by 'mouth to mouth' (i.e putting some cloth over the header tank and blowing into it with the bleeder screw open (clear hazzards here although many specialists seem to do it this way) or to get a pressure bleeder kit.
I improvised on the latter. I used a zip tie, an old bike inner tube and a bike pump (albeit a fancy pricey footpump that I use for a few things).
Cutting the old inner tube up and zip tieing the end was step one. Next step was to cut the other side of the inner tube (of the valve) and an angle and to then put it over the top of the expansion cap so as to form a tight seal. And then slowly compress the handle until you get some pressure (only about 5PSi was required for mine, but I wouldn't go beyond 10).
With the gravity method I only got 3.5 litres into the cooling system. With this method, it bled the air out via the bleeding screw (before it became consistant you could hear the air gurgling around in the system etc.). It took around 8-9 litres after I was finished, and it did seem to have much of an airlock left either compared to previous attempts (I bled it after the stat had opened too). Remember that I changed almost every part of the cooling system in my case (new cooling hoses, new heater matrix and heater pipes, and a new thermostat).
Whilst it's not the most glamorous method, I figured that it may be of some use to other TIPECers
.
Pics will come soon if you want to see more of what I used and how I cut things etc.
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