1979 210 Models
- Remove thermal vacuum valve from engine. Submerge valve in a container of water below 41-64°F (5-18°C). Apply vacuum to top port of valve. Valve passage should be closed.
- Heat water to 65-120°F (18-49°C). DO NOT allow water to enter thermal vacuum valve during test. Apply vacuum to top port of valve. Valve passage should now be open. Now heat water to above 122-145°F (50-63°C), and again apply vacuum to top port of valve. Valve should again be closed.
Courtesy of NISSAN NORTH AMERICA, INC.