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Old 08-27-2002, 03:16 PM
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Join Date: May 2000
Posts: 376
When closed, should a heater valve block all coolant flow?

When I checked mine (87 190e) out of the car with vacuum applied, it will flow just a trickle of fluid. Is this normal or should it seal completely.

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Old 08-27-2002, 05:28 PM
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
There have been 3 different brands of these heater valves on the W201 chassis. ONE brand didn't seal off the water completely, BUT it should have.
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Old 08-28-2002, 08:19 AM
it leaks, its german
Join Date: Mar 2002
Location: raleigh nc
Posts: 1,111
Same here, I've never seen one completly seal. :-(

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