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On 21 Nov 2005 at 10:35, David Y wrote: > I went out and bought a new T3 Brosol pump ($23) and noticed the second I > pulled it out of the box that the spring(s) on my old one were shot to > hell: I could operate the action with my pinky! I actually thought the new > one might be defective/stuck since it took so much more relative pressure > to actuate. I don't have much experience with the mech pumps, but I thought they were ALL rather hard to depress with your finger. It's hard to imagine what would make one go this bad. It's usually the diaphram that goes, not the springs. Will you be able to take the new one apart in the future if necessary? It's the springs which control the supplied fuel pressure, so your old pump would have been putting out an extremely low pressure. While others have always pointed out that type 3s take a higher pressure pump, I once calculated how much difference in carb bowl filling depth this would make and it was only a few thousandths of an inch. I think the fact that your old pump worked fine once it was running, demonstrates that pressure is not all that important. OTOH, if it was also putting out low FLOW, then this might have been making your carbs run lean and might explain your engine temp. Keep watching your temps now and let us know what you find. > So, the immobilizing vapor lock problem is gone, but is it normal to have > to turn a hot motor over a few more times than cold? I would expect to have some trouble. There's really just no way to avoid having some of the gas boil away, which will leave your carb bowls low or empty. Once it gets running at all, the pump should fill everything up rather quickly, as you observed. -- Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~