Air Injection Pump: Service and Repair

AIR Pump Removal:

REMOVAL

1. Hold pump pulley from turning by compressing drive belt, then loosen pump pulley bolts.
2. Loosen bolts, holding pump to mounting brackets, release tension on drive belts.
3. Move belts out of the way, then remove pump hoses, vacuum and electrical connections, and control valve.
4. Remove pulley, then pump.
5. If required, insert needle nose pliers and pull filter fan from hub.

INSTALLATION

1. Install air pump assembly, and tighten mounting bolts.
2. Install hoses, vacuum and electrical connections, and control valve.
3. Install new filter fan on pump hub.
4. Install spacer and pump pulley against centrifugal filter fan.
5. Install pump pulley bolts and tighten equally to 13 Nm (10 lb ft). This will compress the centrifugal filter fan onto the pump hole. DO NOT drive filter fan on with a hammer. A slight amount of interference with the housing bore is normal. After a new filter fan has been installed, it may sequela upon initial operation or until O.D. sealing lip has worn in. This may require a short period of pump operation at various engine speeds.
6. Install pump drive belt and adjust.
7. Check air injection system for proper operation.