That is all it takes in warm weather, a tiny leak. Check any new valve the same way. If you can blow though it at all when closed, reject it. Mark Shawn Wright wrote: > While replacing my rad, I also removing my front heater control valve, since > I still seemed to be getting heat in the core even with the valve fully closed. I > had already checked that the control cable was closing it all the way. > Blowing in the valve shows that there is some leakage, but not a lot - > blowing as hard as I can produces a barely noticeable amount of air coming > out the other side. This doesn't seem like enough to cause the amount of > heat I'm getting in the core - enough that it's uncomfortable to drive when > hot out just from the air coming out of the vents with the fan off. > > I recall others commenting on this valve leaking. How much does it have to > leak to be a problem? Is there some other explanation? Could reversing the > flow from the engine cause the problem? (I may have done this in error > when installing my TD). > > Thanks. > > Shawn Wright > http://members.shaw.ca/vwdiesels > '88 Westy 1.6TD 5 speed > '85 Jetta Diesel 1.6NA > |
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