LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 1979 >> B2000 Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Spark Delay Timing Control >> Testing >> Water THERMO Valve
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Water THERMO Valve

  1. Remove cap from filter portion of water thermo valve. Clean filter and allow to dry. Install filter in original position. Ensure there is no water leak from thermo valve.
  2. With engine cold, run engine at 2000 RPM. Detach vacuum sensing hose from thermo valve (leading to vacuum delay valve). Hold finger over valve nipple and be sure no suction is felt. If suction is present, replace valve.
  3. Warm engine to normal operating temperature. Remove cap from filter portion of valve. Check that no air suction is felt at filter. If suction is present, replace valve.
scientia non olet · About LEMON Manuals