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Home >> Opel >> 1979 >> Opel 4D Sedan, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Air Injection System >> Operation >> Air Pump
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Air Pump

Air pump is belt driven. It draws fresh air in, pressurizes it and passes it along to rest of system. A built-in relief valve will bleed off any excess pressure occurring in the air pump. Normal air pump pressure is 2.8-4.9 psi (.20-.34 kg/cm2 ).