>| After clamping both coolant hoses with a screw down clamp (can you >| imagine the vice grips popping off after hitting a big bump?) I removed >| the heater core and valve. The o-ring didn't have much "o" left, cross >| section wise; good reason for leak. The valve seems senescent, too. If it >| can't keep me from blowing air through it when closed, I'm sure that it >| can't hold back the coolant. I recently did the same work, and found my valve didn't really close all the way. I assume this was designed into the vavle (though I don't really know of any pausible explanation). Is the valve supposed to actually close all the way? dave
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