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Home › Honda › 1983 › Accord Base, 2D Hatchback, Automatic › Repair and Diagnosis › Engine Performance › System › Carburetor - KEIHIN › Testing › THERMOVALVE Test

THERMOVALVE Test

  1. Drain engine coolant until level is below distributor holder. Remove the distributor holder and thermovalve. Attach vacuum pump and apply vacuum to thermovalve.
    NOTE: Install additional vacuum hose on open vacuum port to prevent water from entering valve.
  2. Suspend thermovalve in cold water. Slowly heat water and note temperature and vacuum readings. Make certain thermometer does not contact bottom of container.
  3. Thermovalve "A" should open below 60°F (15°C) and not hold vacuum. Valve should close above 77°F (25°C) and hold vacuum. Thermovalve "B" should open below 104°F (40°C) and close above 122°F (50°C).
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