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Home >> Mazda >> 1982 >> B2000 Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Exhaust Gas RECIRCULATION >> Testing >> Water THERMO Valves >> B2000 Models
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B2000 Models

  1. Drain radiator until coolant level is below intake manifold. Disconnect vacuum hoses from water thermo valve and remove valve from intake manifold.
  2. Attach a hose to each port of valve and place valve in container of water with thermometer. Suspend valve in water so it does not touch container.
  3. Gradually heat water and blow into vacuum hose. Air should pass through valve when temperature is 122°F (50°C). If valve does not respond as outlined, replace water thermo valve.
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