LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Isuzu >> 1984 >> Impulse Standard >> Repair and Diagnosis >> Engine Performance >> System >> EGR System >> Operation >> Thermal Vacuum Valve
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Thermal Vacuum Valve

Mounted on intake manifold, thermal vacuum valve is connected between vacuum port in carburetor and EGR valve. Valve opens when coolant temperature reaches 97-111°F (36-44°C). With valve closed, EGR system does not operate. As coolant warms, valve opens allowing normal EGR operation.

scientia non olet · About LEMON Manuals