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Jim Adney wrote: > That's right; it doesn't actually seal, it just reduces the flow to a minimum. > > Right, fully sealed i could still blow a little air through it, and it gurgled a little since it was extra oily in the valve from the oil I put in to free it. > Right, but you'll probably have to jiggle the piston inside again to > get it to > move back. Every time you repeat this it frees up a little more. > > This is exactly what happened. When the unit cooled down, I could still see the valve was closed, but when I touched it with the screwdriver, it sprung open so the round hole in the piston was MOSTLY lined up with the lower tube. > I don't know for sure, because I've never had a completelly dead one that I > felt comfortable tearing apart, but my bet would be that Bosch made this to > work in an oily environment and that it would work there just fine. The air > passing thru it comes thru an oil-filled air cleaner after all. > > Well, a completely dead one would be one that resistance is either 0 or infinity- a shorted element or a broken element. Not much you can do with one of those other than open it up and put in about 13 ohms worth of heating element wire on the ceramic heater base. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~