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Home >> Isuzu >> 1984 >> Pickup Base, 2.2 S, RWD, Standard, MSG5K >> Repair and Diagnosis >> Engine Performance >> System >> Air Injection System >> Operation >> Check Valve
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Check Valve

This one-way flow control directs air into air injection manifold from air pump. When exhaust system pressure is greater than air pump pressure, check valve closes to prevent exhaust gas from flowing back into air pump system and damaging components.

Fig 1: Air Injection System (P'UP - Federal & Trooper II) P'UP Federal models do not use vacuum switching valve.
G41236
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