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Home >> Mazda >> 1990 >> B2600i Base, 2D Pickup >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - CARBURETED >> Coolant Temperature THERMOVALVE Test
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Coolant Temperature THERMOVALVE Test

Remove coolant temperature thermovalve. See Figure . Connect vacuum tubing to each port and immerse valve in water-filled container. Heat water gradually and observe temperature. Blow through valve from one vacuum port and verify air comes out other port at more than 129°F (54°C). If air does not pass as indicated, replace thermovalve. Install thermovalve and tighten to 18-39 ft. lbs. (25-53 N.m).