Hydraulic Brake Booster Pump: Service and Repair

Power Brake Booster Auxiliary Pump Replacement

Removal Procedure





1. Remove the air cleaner resonator and outlet duct. Refer to Air Cleaner Resonator and Outlet Duct Replacement (L99 or LS3) Air Cleaner Resonator and Outlet Duct Replacement (LSA) or Air Cleaner Outlet Duct Replacement Air Cleaner Outlet Duct Replacement.

2. Release the power brake booster vacuum pump hose quick connect (1).

3. Disconnect the power brake booster vacuum pump hose from the auxiliary pump.

4. Disconnect the power brake booster vacuum pump electrical connector.





5. Remove the power brake booster vacuum pump bracket M6 bolt (1).

6. Remove the power brake booster vacuum pump bracket M12 bolt (2).

7. Remove the power brake booster vacuum pump from the engine.





8. Remove the power brake booster vacuum pump bolts (1) and nuts (2).

9. Release the power brake booster vacuum pump electrical harness connector retainer from the bracket.





10. Remove the power brake booster vacuum pump bracket (1).





11. Remove the power brake booster vacuum pump insulator sleeves (1).

12. Remove the power brake booster vacuum pump insulators (2).

Installation Procedure





1. Assemble the power brake booster pump sleeves (1) to the insulators (2).

2. Install the power brake booster pump insulators.





3. Install the power brake booster vacuum pump bracket (1).





Caution:
Refer to Fastener Caution Fastener Caution.

4. Install the power brake booster pump bolts (1) and nuts (2) and tighten to 22 Nm (16 lb ft).

5. Install the power brake booster vacuum pump electrical harness connector retainer to the bracket.





6. Position the power brake booster vacuum pump to the engine.

7. Loosely install the power brake booster vacuum pump bracket M6 bolt (1).

8. Loosely install the power brake booster vacuum pump bracket M12 bolt (2).

9. Tighten the power brake booster vacuum pump bracket M6 bolt to 10 Nm (89 lb in).

10. Tighten the power brake booster vacuum pump bracket M12 bolt to 70 Nm (52 lb ft).





11. Install the power brake booster vacuum pump hose.

12. Connect the power brake booster vacuum pump hose quick connect (1).

13. Connect the power brake booster vacuum pump electrical connector.

14. Install the air cleaner resonator and outlet duct. Refer to Air Cleaner Resonator and Outlet Duct Replacement (L99 or LS3) Air Cleaner Resonator and Outlet Duct Replacement (LSA) or Air Cleaner Outlet Duct Replacement Air Cleaner Outlet Duct Replacement.