How to change the compressor on 99 bmw

bert mackey, try this:"

A/C Compressor, replacing

1 . Following manufacturer's instructions, connect an approved refrigerant recovery/recycling/recharging unit to A/C system and discharge system .

WARNING

Do not discharge/charge the A/C system without proper equipment and training. Damage to the vehicle and personal injury may result.

2. Remove splash shield from under engine.

3. Mark A/C drive belt with direction of rotation . Remove A/C belt tensioner trim cap. See Fig. 34.

4. On 4-cylinder engines: Loosen A/C belt tensioner bolt under trim cap, then remove belt from A/C compressor.

Fig. 35 . 4-cylinder engines: Loosen retaining bolt A on tensioner to release drive-belt tension. To increase tension, rotate pulley in direction of arrow, then tighten bolt A.

5. On 6-cylinder engines: Release tension on A/C belt by turning tensioner pulley clockwíse (against spring tension).See Fig. 36.

6. Disconnect electrical harness connector from compressor.

7. Remove A/C pressure hose and suction hose flange bolts from compressor. Plug hoses immediately See Fig . 37.

8 . Remove compressor mounting bolts . See Fig . 38. Re-move compressor by pulling downward from underneath car.

9. Installation is reverse of removal.

CAUTION-

" Always replace O-rings when reconnecting refrigerant fines.

" When installing a new compressor always replace receiver/drier unit.

10. Before recharging, evacuate system for at least 30 min.Recharge system following equipment manufacturer'. Hope this helps, good luck.