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Home >> Mazda >> 1983 >> GLC Base >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Evaporation System >> Component Testing >> Water THERMO Valve

Water THERMO Valve

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  1. Disconnect water thermo valve-to-purge control valve hose and water thermo valve-to-vacuum amplifier hose. Start engine and run at idle.
  2. With engine cold, no vacuum should be present at hoses. With engine coolant temperature above 131°F (55°C), vacuum should be felt. If not, replace water thermo valve.
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