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Old 03-05-2002, 12:07 PM
Posts: n/a
Besides inspecting the monovlave, the easiest way to tell is to drive the car for 15 minutes around the neighberhood, shut the car off for a few mins, then start it again. If it blows hot for a minute or so (heat built up in the engine comp't), then starts to blow cool air, it's most likely the monovalve.
It usually fails because the rubber seal tears on the valve or the rubber diaphragm.
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